R.I.P. devfs

SVN-Revision: 6478

10 files changed, 36 insertions, 12398 deletions

diff --git a/package/base-files/files/etc/inittab b/package/base-files/files/etc/inittab
index 39e134c..3d92717 100644
--- a/package/base-files/files/etc/inittab
+++ b/package/base-files/files/etc/inittab
@@ -1,3 +1,3 @@
 ::sysinit:/etc/init.d/rcS
 tts/0::askfirst:/bin/ash --login
-#tts/1::askfirst:/bin/ash --login
+ttyS0::askfirst:/bin/ash --login
diff --git a/package/base-files/files/etc/mdev.conf b/package/base-files/files/etc/mdev.conf
new file mode 100644
index 0000000..8935583
--- /dev/null
+++ b/package/base-files/files/etc/mdev.conf
@@ -0,0 +1,5 @@
+null 0:0 777
+zero 0:0 666
+console 0:5 0600
+tty 0:5 0660
+ttyS* 0:20 640
diff --git a/package/base-files/files/sbin/hotplug b/package/base-files/files/sbin/hotplug
index b1b6f97..75d5170 100755
--- a/package/base-files/files/sbin/hotplug
+++ b/package/base-files/files/sbin/hotplug
@@ -1,6 +1,8 @@
 #!/bin/sh
 # Copyright (C) 2006 OpenWrt.org
 
+[ -x /sbin/mdev ] && /sbin/mdev "$@"
+
 # bypass the normal hotplug path for firmware loading
 # would otherwise cause problems with drivers like bcm43xx
 [ "$1" = "firmware" -a "$ACTION" = "add" ] && {
diff --git a/package/busybox/Makefile b/package/busybox/Makefile
index 530b027..3e6cc4e 100644
--- a/package/busybox/Makefile
+++ b/package/busybox/Makefile
@@ -41,6 +41,7 @@ The Swiss Army Knife of embedded Linux.
 endef
 
 define Package/busybox/config
+	source "$(SOURCE)/target-config.in"
 	menu "Configuration"
 		depends on PACKAGE_busybox
 		source "$(SOURCE)/config/Config.in"
diff --git a/package/busybox/config/miscutils/Config.in b/package/busybox/config/miscutils/Config.in
index 41a42c9..4e41889 100644
--- a/package/busybox/config/miscutils/Config.in
+++ b/package/busybox/config/miscutils/Config.in
@@ -105,7 +105,7 @@ config BUSYBOX_CONFIG_DEVFSD_VERBOSE
 
 config BUSYBOX_CONFIG_FEATURE_DEVFS
 	bool "  Use devfs names for all devices (obsolete)"
-	default y
+	default n
 	help
 	  This is obsolete and will be going away at the end of 2008..
 
diff --git a/package/busybox/config/util-linux/Config.in b/package/busybox/config/util-linux/Config.in
index ab3dc37..0f219d7 100644
--- a/package/busybox/config/util-linux/Config.in
+++ b/package/busybox/config/util-linux/Config.in
@@ -267,7 +267,7 @@ config BUSYBOX_CONFIG_LOSETUP
 
 config BUSYBOX_CONFIG_MDEV
 	bool "mdev"
-	default n
+	default y
 	help
 	  mdev is a mini-udev implementation: call it with -s to populate
 	  /dev from /sys, then "echo /sbin/mdev > /proc/sys/kernel/hotplug" to
@@ -276,7 +276,7 @@ config BUSYBOX_CONFIG_MDEV
 
 config BUSYBOX_CONFIG_FEATURE_MDEV_CONF
 	bool "Support /etc/mdev.conf"
-	default n
+	default y
 	depends on BUSYBOX_CONFIG_MDEV
 	help
 	  The mdev config file contains lines that look like:
diff --git a/package/busybox/target-config.in b/package/busybox/target-config.in
new file mode 100644
index 0000000..77c58ce
--- /dev/null
+++ b/package/busybox/target-config.in
@@ -0,0 +1,11 @@
+config BUSYBOX_CONFIG_FEATURE_DEVFS
+	default y if LINUX_2_4
+	default n if LINUX_2_6
+
+config BUSYBOX_CONFIG_MDEV
+	default n if LINUX_2_4
+	default y if LINUX_2_6
+
+config BUSYBOX_CONFIG_FEATURE_MDEV_CONF
+	default n if LINUX_2_4
+	default y if LINUX_2_6
diff --git a/target/linux/generic-2.6/files/init b/target/linux/generic-2.6/files/init
index 1fa6a7f..292d429 100755
--- a/target/linux/generic-2.6/files/init
+++ b/target/linux/generic-2.6/files/init
@@ -3,8 +3,19 @@
 
 export PATH=/bin:/sbin:/usr/bin:/usr/sbin
 mount none /proc -t proc
-mount none /dev -t devfs
-mount non /dev/pts -t devpts
+
+if grep devfs /proc/filesystems > /dev/null; then
+	mount none /dev -t devfs
+else
+	mount -t sysfs none /sys
+	mount -t tmpfs tmpfs /dev -o size=512K
+	mknod /dev/console c 5 1
+	mkdir /dev/pts
+	mkdir /dev/shm
+	/sbin/mdev -s
+fi
+
+mount none /dev/pts -t devpts
 
 # the root mount point can come from the kernel command line
 # or it can be overridden in the preinit.arch file
diff --git a/target/linux/generic-2.6/patches/000-reinstate-devfs.patch b/target/linux/generic-2.6/patches/000-reinstate-devfs.patch
deleted file mode 100644
index 5429a0e..0000000
--- a/target/linux/generic-2.6/patches/000-reinstate-devfs.patch
+++ /dev/null
@@ -1,12377 +0,0 @@
-diff -urN linux-2.6.19.old/arch/cris/arch-v10/kernel/debugport.c linux-2.6.19.dev/arch/cris/arch-v10/kernel/debugport.c
---- linux-2.6.19.old/arch/cris/arch-v10/kernel/debugport.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/arch/cris/arch-v10/kernel/debugport.c	2006-12-14 03:12:59.000000000 +0100
-@@ -540,7 +540,7 @@
- 	dummy_driver.init_termios = tty_std_termios;
- 	dummy_driver.init_termios.c_cflag =
- 		B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */
--	dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-+	dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
- 
- 	dummy_driver.open = dummy_open;
- 	dummy_driver.close = dummy_close;
-diff -urN linux-2.6.19.old/arch/cris/arch-v32/kernel/debugport.c linux-2.6.19.dev/arch/cris/arch-v32/kernel/debugport.c
---- linux-2.6.19.old/arch/cris/arch-v32/kernel/debugport.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/arch/cris/arch-v32/kernel/debugport.c	2006-12-14 03:12:59.000000000 +0100
-@@ -352,7 +352,7 @@
- 	dummy_driver.init_termios = tty_std_termios;
- 	dummy_driver.init_termios.c_cflag =
- 		B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */
--	dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-+	dummy_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
- 
- 	dummy_driver.open = dummy_open;
- 	dummy_driver.close = dummy_close;
-diff -urN linux-2.6.19.old/arch/i386/kernel/microcode.c linux-2.6.19.dev/arch/i386/kernel/microcode.c
---- linux-2.6.19.old/arch/i386/kernel/microcode.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/arch/i386/kernel/microcode.c	2006-12-14 03:12:59.000000000 +0100
-@@ -460,6 +460,7 @@
- static struct miscdevice microcode_dev = {
- 	.minor		= MICROCODE_MINOR,
- 	.name		= "microcode",
-+	.devfs_name	= "cpu/microcode",
- 	.fops		= &microcode_fops,
- };
- 
-diff -urN linux-2.6.19.old/arch/ppc/4xx_io/serial_sicc.c linux-2.6.19.dev/arch/ppc/4xx_io/serial_sicc.c
---- linux-2.6.19.old/arch/ppc/4xx_io/serial_sicc.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/arch/ppc/4xx_io/serial_sicc.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1757,7 +1757,7 @@
-     siccnormal_driver->subtype = SERIAL_TYPE_NORMAL;
-     siccnormal_driver->init_termios = tty_std_termios;
-     siccnormal_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
--    siccnormal_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-+    siccnormal_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
-     tty_set_operations(siccnormal_driver, &sicc_ops);
- 
-     if (tty_register_driver(siccnormal_driver))
-diff -urN linux-2.6.19.old/arch/sparc64/solaris/socksys.c linux-2.6.19.dev/arch/sparc64/solaris/socksys.c
---- linux-2.6.19.old/arch/sparc64/solaris/socksys.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/arch/sparc64/solaris/socksys.c	2006-12-14 03:12:59.000000000 +0100
-@@ -26,6 +26,7 @@
- #include <linux/slab.h>
- #include <linux/syscalls.h>
- #include <linux/in.h>
-+#include <linux/devfs_fs_kernel.h>
- 
- #include <net/sock.h>
- 
-@@ -188,6 +189,8 @@
- 		return ret;
- 	}
- 
-+	devfs_mk_cdev(MKDEV(30, 0), S_IFCHR|S_IRUSR|S_IWUSR, "socksys");
-+
- 	file = fcheck(ret);
- 	/* N.B. Is this valid? Suppose the f_ops are in a module ... */
- 	socksys_file_ops = *file->f_op;
-@@ -202,4 +205,5 @@
- {
- 	if (unregister_chrdev(30, "socksys"))
- 		printk ("Couldn't unregister socksys character device\n");
-+	devfs_remove ("socksys");
- }
-diff -urN linux-2.6.19.old/arch/um/drivers/line.c linux-2.6.19.dev/arch/um/drivers/line.c
---- linux-2.6.19.old/arch/um/drivers/line.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/arch/um/drivers/line.c	2006-12-14 03:12:59.000000000 +0100
-@@ -8,6 +8,7 @@
- #include "linux/list.h"
- #include "linux/kd.h"
- #include "linux/interrupt.h"
-+#include "linux/devfs_fs_kernel.h"
- #include "asm/uaccess.h"
- #include "chan_kern.h"
- #include "irq_user.h"
-@@ -653,6 +654,7 @@
- 
- 	driver->driver_name = line_driver->name;
- 	driver->name = line_driver->device_name;
-+	driver->devfs_name = line_driver->devfs_name;
- 	driver->major = line_driver->major;
- 	driver->minor_start = line_driver->minor_start;
- 	driver->type = line_driver->type;
-diff -urN linux-2.6.19.old/arch/um/drivers/ssl.c linux-2.6.19.dev/arch/um/drivers/ssl.c
---- linux-2.6.19.old/arch/um/drivers/ssl.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/arch/um/drivers/ssl.c	2006-12-14 03:12:59.000000000 +0100
-@@ -53,6 +53,7 @@
- static struct line_driver driver = {
- 	.name 			= "UML serial line",
- 	.device_name 		= "ttyS",
-+	.devfs_name 		= "tts/",
- 	.major 			= TTY_MAJOR,
- 	.minor_start 		= 64,
- 	.type 		 	= TTY_DRIVER_TYPE_SERIAL,
-diff -urN linux-2.6.19.old/arch/um/drivers/stdio_console.c linux-2.6.19.dev/arch/um/drivers/stdio_console.c
---- linux-2.6.19.old/arch/um/drivers/stdio_console.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/arch/um/drivers/stdio_console.c	2006-12-14 03:12:59.000000000 +0100
-@@ -59,6 +59,7 @@
- static struct line_driver driver = {
- 	.name 			= "UML console",
- 	.device_name 		= "tty",
-+	.devfs_name 		= "vc/",
- 	.major 			= TTY_MAJOR,
- 	.minor_start 		= 0,
- 	.type 		 	= TTY_DRIVER_TYPE_CONSOLE,
-diff -urN linux-2.6.19.old/arch/um/drivers/ubd_kern.c linux-2.6.19.dev/arch/um/drivers/ubd_kern.c
---- linux-2.6.19.old/arch/um/drivers/ubd_kern.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/arch/um/drivers/ubd_kern.c	2006-12-14 03:12:59.000000000 +0100
-@@ -24,6 +24,7 @@
- #include "linux/blkdev.h"
- #include "linux/hdreg.h"
- #include "linux/init.h"
-+#include "linux/devfs_fs_kernel.h"
- #include "linux/cdrom.h"
- #include "linux/proc_fs.h"
- #include "linux/ctype.h"
-@@ -645,10 +646,14 @@
- 	disk->first_minor = unit << UBD_SHIFT;
- 	disk->fops = &ubd_blops;
- 	set_capacity(disk, size / 512);
--	if(major == MAJOR_NR)
-+	if(major == MAJOR_NR){
- 		sprintf(disk->disk_name, "ubd%c", 'a' + unit);
--	else
-+		sprintf(disk->devfs_name, "ubd/disc%d", unit);
-+	}
-+	else {
- 		sprintf(disk->disk_name, "ubd_fake%d", unit);
-+		sprintf(disk->devfs_name, "ubd_fake/disc%d", unit);
-+	}
- 
- 	/* sysfs register (not for ide fake devices) */
- 	if (major == MAJOR_NR) {
-@@ -853,6 +864,7 @@
- {
-         int i;
- 
-+	devfs_mk_dir("ubd");
- 	if (register_blkdev(MAJOR_NR, "ubd"))
- 		return -1;
- 
-@@ -866,6 +878,7 @@
- 		char name[sizeof("ubd_nnn\0")];
- 
- 		snprintf(name, sizeof(name), "ubd_%d", fake_major);
-+		devfs_mk_dir(name);
- 		if (register_blkdev(fake_major, "ubd"))
- 			return -1;
- 	}
-diff -urN linux-2.6.19.old/arch/um/include/line.h linux-2.6.19.dev/arch/um/include/line.h
---- linux-2.6.19.old/arch/um/include/line.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/arch/um/include/line.h	2006-12-14 03:12:59.000000000 +0100
-@@ -17,6 +17,7 @@
- struct line_driver {
- 	char *name;
- 	char *device_name;
-+	char *devfs_name;
- 	short major;
- 	short minor_start;
- 	short type;
-diff -urN linux-2.6.19.old/Documentation/Changes linux-2.6.19.dev/Documentation/Changes
---- linux-2.6.19.old/Documentation/Changes	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/Documentation/Changes	2006-12-14 03:12:59.000000000 +0100
-@@ -180,8 +180,8 @@
- --------------------
- 
- A driver has been added to allow updating of Intel IA32 microcode,
--accessible as a normal (misc) character device.  If you are not using
--udev you may need to:
-+accessible as both a devfs regular file and as a normal (misc)
-+character device.  If you are not using devfs you may need to:
- 
- mkdir /dev/cpu
- mknod /dev/cpu/microcode c 10 184
-@@ -200,9 +200,7 @@
- udev
- ----
- udev is a userspace application for populating /dev dynamically with
--only entries for devices actually present.  udev replaces the basic
--functionality of devfs, while allowing persistant device naming for
--devices.
-+only entries for devices actually present. udev replaces devfs.
- 
- FUSE
- ----
-@@ -232,13 +230,18 @@
- enable it to operate over diverse media layers.  If you use PPP,
- upgrade pppd to at least 2.4.0.
- 
--If you are not using udev, you must have the device file /dev/ppp
-+If you are not using devfs, you must have the device file /dev/ppp
- which can be made by:
- 
- mknod /dev/ppp c 108 0
- 
- as root.
- 
-+If you use devfsd and build ppp support as modules, you will need
-+the following in your /etc/devfsd.conf file:
-+
-+LOOKUP	PPP	MODLOAD
-+
- Isdn4k-utils
- ------------
- 
-diff -urN linux-2.6.19.old/Documentation/DocBook/kernel-api.tmpl linux-2.6.19.dev/Documentation/DocBook/kernel-api.tmpl
---- linux-2.6.19.old/Documentation/DocBook/kernel-api.tmpl	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/Documentation/DocBook/kernel-api.tmpl	2006-12-14 03:12:59.000000000 +0100
-@@ -84,6 +84,9 @@
- !Ekernel/rcupdate.c
-      </sect1>
- 
-+  <chapter id="devfs">
-+     <title>The Device File System</title>
-+!Efs/devfs/base.c
-   </chapter>
- 
-   <chapter id="adt">
-diff -urN linux-2.6.19.old/Documentation/filesystems/devfs/boot-options linux-2.6.19.dev/Documentation/filesystems/devfs/boot-options
---- linux-2.6.19.old/Documentation/filesystems/devfs/boot-options	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.19.dev/Documentation/filesystems/devfs/boot-options	2006-12-14 03:12:59.000000000 +0100
-@@ -0,0 +1,65 @@
-+/* -*- auto-fill -*-                                                         */
-+
-+		Device File System (devfs) Boot Options
-+
-+		Richard Gooch <rgooch@atnf.csiro.au>
-+
-+			      18-AUG-2001
-+
-+
-+When CONFIG_DEVFS_DEBUG is enabled, you can pass several boot options
-+to the kernel to debug devfs. The boot options are prefixed by
-+"devfs=", and are separated by commas. Spaces are not allowed. The
-+syntax looks like this:
-+
-+devfs=<option1>,<option2>,<option3>
-+
-+and so on. For example, if you wanted to turn on debugging for module
-+load requests and device registration, you would do:
-+
-+devfs=dmod,dreg
-+
-+You may prefix "no" to any option. This will invert the option.
-+
-+
-+Debugging Options
-+=================
-+
-+These requires CONFIG_DEVFS_DEBUG to be enabled.
-+Note that all debugging options have 'd' as the first character. By
-+default all options are off. All debugging output is sent to the
-+kernel logs. The debugging options do not take effect until the devfs
-+version message appears (just prior to the root filesystem being
-+mounted).
-+
-+These are the options:
-+
-+dmod		print module load requests to <request_module>
-+
-+dreg		print device register requests to <devfs_register>
-+
-+dunreg		print device unregister requests to <devfs_unregister>
-+
-+dchange		print device change requests to <devfs_set_flags>
-+
-+dilookup	print inode lookup requests
-+
-+diget		print VFS inode allocations
-+
-+diunlink	print inode unlinks
-+
-+dichange	print inode changes
-+
-+dimknod		print calls to mknod(2)
-+
-+dall		some debugging turned on
-+
-+
-+Other Options
-+=============
-+
-+These control the default behaviour of devfs. The options are:
-+
-+mount		mount devfs onto /dev at boot time
-+
-+only		disable non-devfs device nodes for devfs-capable drivers
-diff -urN linux-2.6.19.old/Documentation/filesystems/devfs/ChangeLog linux-2.6.19.dev/Documentation/filesystems/devfs/ChangeLog
---- linux-2.6.19.old/Documentation/filesystems/devfs/ChangeLog	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.19.dev/Documentation/filesystems/devfs/ChangeLog	2006-12-14 03:12:59.000000000 +0100
-@@ -0,0 +1,1977 @@
-+/* -*- auto-fill -*-                                                         */
-+===============================================================================
-+Changes for patch v1
-+
-+- creation of devfs
-+
-+- modified miscellaneous character devices to support devfs
-+===============================================================================
-+Changes for patch v2
-+
-+- bug fix with manual inode creation
-+===============================================================================
-+Changes for patch v3
-+
-+- bugfixes
-+
-+- documentation improvements
-+
-+- created a couple of scripts (one to save&restore a devfs and the
-+  other to set up compatibility symlinks)
-+
-+- devfs support for SCSI discs. New name format is: sd_hHcCiIlL
-+===============================================================================
-+Changes for patch v4
-+
-+- bugfix for the directory reading code
-+
-+- bugfix for compilation with kerneld
-+
-+- devfs support for generic hard discs
-+
-+- rationalisation of the various watchdog drivers
-+===============================================================================
-+Changes for patch v5
-+
-+- support for mounting directly from entries in the devfs (it doesn't
-+  need to be mounted to do this), including the root filesystem.
-+  Mounting of swap partitions also works. Hence, now if you set
-+  CONFIG_DEVFS_ONLY to 'Y' then you won't be able to access your discs
-+  via ordinary device nodes. Naturally, the default is 'N' so that you
-+  can still use your old device nodes.  If you want to mount from devfs
-+  entries, make sure you use: append = "root=/dev/sd_..." in your
-+  lilo.conf. It seems LILO looks for the device number (major&minor)
-+  and writes that into the kernel image :-( 
-+
-+- support for character memory devices (/dev/null, /dev/zero, /dev/full
-+  and so on). Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
-+===============================================================================
-+Changes for patch v6
-+
-+- support for subdirectories
-+
-+- support for symbolic links (created by devfs_mk_symlink(), no
-+  support yet for creation via symlink(2))
-+
-+- SCSI disc naming now cast in stone, with the format:
-+  /dev/sd/c0b1t2u3	controller=0, bus=1, ID=2, LUN=3, whole disc
-+  /dev/sd/c0b1t2u3p4	controller=0, bus=1, ID=2, LUN=3, 4th partition
-+
-+- loop devices now appear in devfs
-+
-+- tty devices, console, serial ports, etc. now appear in devfs
-+  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
-+
-+- bugs with mounting devfs-only devices now fixed
-+===============================================================================
-+Changes for patch v7
-+
-+- SCSI CD-ROMS, tapes and generic devices now appear in devfs
-+===============================================================================
-+Changes for patch v8
-+
-+- bugfix with no-rewind SCSI tapes
-+
-+- RAMDISCs now appear in devfs
-+
-+- better cleaning up of devfs entries created by various modules
-+
-+- interface change to <devfs_register>
-+===============================================================================
-+Changes for patch v9
-+
-+- the v8 patch was corrupted somehow, which would affect the patch for
-+  linux/fs/filesystems.c
-+  I've also fixed the v8 patch file on the WWW
-+
-+- MetaDevices (/dev/md*) should now appear in devfs
-+===============================================================================
-+Changes for patch v10
-+
-+- bugfix in meta device support for devfs
-+
-+- created this ChangeLog file
-+
-+- added devfs support to the floppy driver
-+
-+- added support for creating sockets in a devfs
-+===============================================================================
-+Changes for patch v11
-+
-+- added DEVFS_FL_HIDE_UNREG flag
-+
-+- incorporated better patch for ttyname() in libc 5.4.43 from H.J. Lu.
-+
-+- interface change to <devfs_mk_symlink>
-+
-+- support for creating symlinks with symlink(2)
-+
-+- parallel port printer (/dev/lp*) now appears in devfs
-+===============================================================================
-+Changes for patch v12
-+
-+- added inode check to <devfs_fill_file> function
-+
-+- improved devfs support when mounting from devfs
-+
-+- added call to <<release>> operation when removing swap areas on
-+  devfs devices
-+
-+- increased NR_SUPER to 128 to support large numbers of devfs mounts
-+  (for chroot(2) gaols)
-+
-+- fixed bug in SCSI disc support: was generating incorrect minors if
-+  SCSI ID's did not start at 0 and increase by 1
-+
-+- support symlink traversal when mounting root
-+===============================================================================
-+Changes for patch v13
-+
-+- added devfs support to soundcard driver
-+  Thanks to Eric Dumas <dumas@linux.eu.org> and
-+  C. Scott Ananian <cananian@alumni.princeton.edu>
-+
-+- added devfs support to the joystick driver
-+
-+- loop driver now has it's own subdirectory "/dev/loop/"
-+
-+- created <devfs_get_flags> and <devfs_set_flags> functions
-+
-+- fix problem with SCSI disc compatibility names (sd{a,b,c,d,e,f})
-+  which assumes ID's start at 0 and increase by 1. Also only create
-+  devfs entries for SCSI disc partitions which actually exist
-+  Show new names in partition check
-+  Thanks to Jakub Jelinek <jj@sunsite.ms.mff.cuni.cz>
-+===============================================================================
-+Changes for patch v14
-+
-+- bug fix in floppy driver: would not compile without
-+  CONFIG_DEVFS_FS='Y'
-+  Thanks to Jurgen Botz <jbotz@nova.botz.org>
-+
-+- bug fix in loop driver
-+  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
-+
-+- do not create devfs entries for printers not configured
-+  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
-+
-+- do not create devfs entries for serial ports not present
-+  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
-+
-+- ensure <tty_register_devfs> is exported from tty_io.c
-+  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
-+
-+- allow unregistering of devfs symlink entries
-+
-+- fixed bug in SCSI disc naming introduced in last patch version
-+===============================================================================
-+Changes for patch v15
-+
-+- ported to kernel 2.1.81
-+===============================================================================
-+Changes for patch v16
-+
-+- created <devfs_set_symlink_destination> function
-+
-+- moved DEVFS_SUPER_MAGIC into header file
-+
-+- added DEVFS_FL_HIDE flag
-+
-+- created <devfs_get_maj_min>
-+
-+- created <devfs_get_handle_from_inode>
-+
-+- fixed bugs in searching by major&minor
-+
-+- changed interface to <devfs_unregister>, <devfs_fill_file> and
-+  <devfs_find_handle>
-+
-+- fixed inode times when symlink created with symlink(2)
-+
-+- change tty driver to do auto-creation of devfs entries
-+  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
-+
-+- fixed bug in genhd.c: whole disc (non-SCSI) was not registered to
-+  devfs
-+
-+- updated libc 5.4.43 patch for ttyname()
-+===============================================================================
-+Changes for patch v17
-+
-+- added CONFIG_DEVFS_TTY_COMPAT
-+  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
-+
-+- bugfix in devfs support for drivers/char/lp.c
-+  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
-+
-+- clean up serial driver so that PCMCIA devices unregister correctly
-+  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
-+
-+- fixed bug in genhd.c: whole disc (non-SCSI) was not registered to
-+  devfs [was missing in patch v16]
-+
-+- updated libc 5.4.43 patch for ttyname() [was missing in patch v16]
-+
-+- all SCSI devices now registered in /dev/sg
-+
-+- support removal of devfs entries via unlink(2)
-+===============================================================================
-+Changes for patch v18
-+
-+- added floppy/?u720 floppy entry
-+
-+- fixed kerneld support for entries in devfs subdirectories
-+
-+- incorporated latest patch for ttyname() in libc 5.4.43 from H.J. Lu.
-+===============================================================================
-+Changes for patch v19
-+
-+- bug fix when looking up unregistered entries: kerneld was not called
-+
-+- fixes for kernel 2.1.86 (now requires 2.1.86)
-+===============================================================================
-+Changes for patch v20
-+
-+- only create available floppy entries
-+  Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
-+
-+- new IDE naming scheme following SCSI format (i.e. /dev/id/c0b0t0u0p1
-+  instead of /dev/hda1)
-+  Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
-+
-+- new XT disc naming scheme following SCSI format (i.e. /dev/xd/c0t0p1
-+  instead of /dev/xda1)
-+  Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
-+
-+- new non-standard CD-ROM names (i.e. /dev/sbp/c#t#)
-+  Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
-+
-+- allow symlink traversal when mounting the root filesystem
-+
-+- Create entries for MD devices at MD init
-+  Thanks to Christophe Leroy <christophe.leroy5@capway.com>
-+===============================================================================
-+Changes for patch v21
-+
-+- ported to kernel 2.1.91
-+===============================================================================
-+Changes for patch v22
-+
-+- SCSI host number patch ("scsihosts=" kernel option)
-+  Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
-+===============================================================================
-+Changes for patch v23
-+
-+- Fixed persistence bug with device numbers for manually created
-+  device files
-+
-+- Fixed problem with recreating symlinks with different content
-+
-+- Added CONFIG_DEVFS_MOUNT (mount devfs on /dev at boot time)
-+===============================================================================
-+Changes for patch v24
-+
-+- Switched from CONFIG_KERNELD to CONFIG_KMOD: module autoloading
-+  should now work again
-+
-+- Hide entries which are manually unlinked
-+
-+- Always invalidate devfs dentry cache when registering entries
-+
-+- Support removal of devfs directories via rmdir(2)
-+
-+- Ensure directories created by <devfs_mk_dir> are visible
-+
-+- Default no access for "other" for floppy device
-+===============================================================================
-+Changes for patch v25
-+
-+- Updates to CREDITS file and minor IDE numbering change
-+  Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
-+
-+- Invalidate devfs dentry cache when making directories
-+
-+- Invalidate devfs dentry cache when removing entries
-+
-+- More informative message if root FS mount fails when devfs
-+  configured
-+
-+- Fixed persistence bug with fifos
-+===============================================================================
-+Changes for patch v26
-+
-+- ported to kernel 2.1.97
-+
-+- Changed serial directory from "/dev/serial" to "/dev/tts" and
-+  "/dev/consoles" to "/dev/vc" to be more friendly to new procps
-+===============================================================================
-+Changes for patch v27
-+
-+- Added support for IDE4 and IDE5
-+  Thanks to Andrzej Krzysztofowicz <ankry@green.mif.pg.gda.pl>
-+
-+- Documented "scsihosts=" boot parameter
-+
-+- Print process command when debugging kerneld/kmod
-+
-+- Added debugging for register/unregister/change operations
-+
-+- Added "devfs=" boot options
-+
-+- Hide unregistered entries by default
-+===============================================================================
-+Changes for patch v28
-+
-+- No longer lock/unlock superblock in <devfs_put_super> (cope with
-+  recent VFS interface change)
-+
-+- Do not automatically change ownership/protection of /dev/tty
-+
-+- Drop negative dentries when they are released
-+
-+- Manage dcache more efficiently
-+===============================================================================
-+Changes for patch v29
-+
-+- Added DEVFS_FL_AUTO_DEVNUM flag
-+===============================================================================
-+Changes for patch v30
-+
-+- No longer set unnecessary methods
-+
-+- Ported to kernel 2.1.99-pre3
-+===============================================================================
-+Changes for patch v31
-+
-+- Added PID display to <call_kerneld> debugging message
-+
-+- Added "diread" and "diwrite" options
-+
-+- Ported to kernel 2.1.102
-+
-+- Fixed persistence problem with permissions
-+===============================================================================
-+Changes for patch v32
-+
-+- Fixed devfs support in drivers/block/md.c
-+===============================================================================
-+Changes for patch v33
-+
-+- Support legacy device nodes
-+
-+- Fixed bug where recreated inodes were hidden
-+
-+- New IDE naming scheme: everything is under /dev/ide
-+===============================================================================
-+Changes for patch v34
-+
-+- Improved debugging in <get_vfs_inode>
-+
-+- Prevent duplicate calls to <devfs_mk_dir> in SCSI layer
-+
-+- No longer free old dentries in <devfs_mk_dir>
-+
-+- Free all dentries for a given entry when deleting inodes
-+===============================================================================
-+Changes for patch v35
-+
-+- Ported to kernel 2.1.105 (sound driver changes)
-+===============================================================================
-+Changes for patch v36
-+
-+- Fixed sound driver port
-+===============================================================================
-+Changes for patch v37
-+
-+- Minor documentation tweaks
-+===============================================================================
-+Changes for patch v38
-+
-+- More documentation tweaks
-+
-+- Fix for sound driver port
-+
-+- Removed ttyname-patch (grab libc 5.4.44 instead)
-+
-+- Ported to kernel 2.1.107-pre2 (loop driver fix)
-+===============================================================================
-+Changes for patch v39
-+
-+- Ported to kernel 2.1.107 (hd.c hunk broke due to spelling "fixes"). Sigh
-+
-+- Removed many #ifdef's, replaced with trickery in include/devfs_fs.h
-+===============================================================================
-+Changes for patch v40
-+
-+- Fix for sound driver port
-+
-+- Limit auto-device numbering to majors 128 to 239
-+===============================================================================
-+Changes for patch v41
-+
-+- Fixed inode times persistence problem
-+===============================================================================
-+Changes for patch v42
-+
-+- Ported to kernel 2.1.108 (drivers/scsi/hosts.c hunk broke)
-+===============================================================================
-+Changes for patch v43
-+
-+- Fixed spelling in <devfs_readlink> debug
-+
-+- Fixed bug in <devfs_setup> parsing "dilookup"
-+
-+- More #ifdef's removed
-+
-+- Supported Sparc keyboard (/dev/kbd)
-+
-+- Supported DSP56001 digital signal processor (/dev/dsp56k)
-+
-+- Supported Apple Desktop Bus (/dev/adb)
-+
-+- Supported Coda network file system (/dev/cfs*)
-+===============================================================================
-+Changes for patch v44
-+
-+- Fixed devfs inode leak when manually recreating inodes
-+
-+- Fixed permission persistence problem when recreating inodes
-+===============================================================================
-+Changes for patch v45
-+
-+- Ported to kernel 2.1.110
-+===============================================================================
-+Changes for patch v46
-+
-+- Ported to kernel 2.1.112-pre1
-+
-+- Removed harmless "unused variable" compiler warning
-+
-+- Fixed modes for manually recreated device nodes
-+===============================================================================
-+Changes for patch v47
-+
-+- Added NULL devfs inode warning in <devfs_read_inode>
-+
-+- Force all inode nlink values to 1
-+===============================================================================
-+Changes for patch v48
-+
-+- Added "dimknod" option
-+
-+- Set inode nlink to 0 when freeing dentries
-+
-+- Added support for virtual console capture devices (/dev/vcs*)
-+  Thanks to Dennis Hou <smilax@mindmeld.yi.org>
-+
-+- Fixed modes for manually recreated symlinks
-+===============================================================================
-+Changes for patch v49
-+
-+- Ported to kernel 2.1.113
-+===============================================================================
-+Changes for patch v50
-+
-+- Fixed bugs in recreated directories and symlinks
-+===============================================================================
-+Changes for patch v51
-+
-+- Improved robustness of rc.devfs script
-+  Thanks to Roderich Schupp <rsch@experteam.de>
-+
-+- Fixed bugs in recreated device nodes
-+
-+- Fixed bug in currently unused <devfs_get_handle_from_inode>
-+
-+- Defined new <devfs_handle_t> type
-+
-+- Improved debugging when getting entries
-+
-+- Fixed bug where directories could be emptied
-+
-+- Ported to kernel 2.1.115
-+===============================================================================
-+Changes for patch v52
-+
-+- Replaced dummy .epoch inode with .devfsd character device
-+
-+- Modified rc.devfs to take account of above change
-+
-+- Removed spurious driver warning messages when CONFIG_DEVFS_FS=n
-+
-+- Implemented devfsd protocol revision 0
-+===============================================================================
-+Changes for patch v53
-+
-+- Ported to kernel 2.1.116 (kmod change broke hunk)
-+
-+- Updated Documentation/Configure.help
-+
-+- Test and tty pattern patch for rc.devfs script
-+  Thanks to Roderich Schupp <rsch@experteam.de>
-+
-+- Added soothing message to warning in <devfs_d_iput>
-+===============================================================================
-+Changes for patch v54
-+
-+- Ported to kernel 2.1.117
-+
-+- Fixed default permissions in sound driver
-+
-+- Added support for frame buffer devices (/dev/fb*)
-+===============================================================================
-+Changes for patch v55
-+
-+- Ported to kernel 2.1.119
-+
-+- Use GCC extensions for structure initialisations
-+
-+- Implemented async open notification
-+
-+- Incremented devfsd protocol revision to 1
-+===============================================================================
-+Changes for patch v56
-+
-+- Ported to kernel 2.1.120-pre3
-+
-+- Moved async open notification to end of <devfs_open>
-+===============================================================================
-+Changes for patch v57
-+
-+- Ported to kernel 2.1.121
-+
-+- Prepended "/dev/" to module load request
-+
-+- Renamed <call_kerneld> to <call_kmod>
-+
-+- Created sample modules.conf file
-+===============================================================================
-+Changes for patch v58
-+
-+- Fixed typo "AYSNC" -> "ASYNC"
-+===============================================================================
-+Changes for patch v59
-+
-+- Added open flag for files
-+===============================================================================
-+Changes for patch v60
-+
-+- Ported to kernel 2.1.123-pre2
-+===============================================================================
-+Changes for patch v61
-+
-+- Set i_blocks=0 and i_blksize=1024 in <devfs_read_inode>
-+===============================================================================
-+Changes for patch v62
-+
-+- Ported to kernel 2.1.123
-+===============================================================================
-+Changes for patch v63
-+
-+- Ported to kernel 2.1.124-pre2
-+===============================================================================
-+Changes for patch v64
-+
-+- Fixed Unix98 pty support
-+
-+- Increased buffer size in <get_partition_list> to avoid crash and
-+  burn
-+===============================================================================
-+Changes for patch v65
-+
-+- More Unix98 pty support fixes
-+
-+- Added test for empty <<name>> in <devfs_find_handle>
-+
-+- Renamed <generate_path> to <devfs_generate_path> and published
-+
-+- Created /dev/root symlink
-+  Thanks to Roderich Schupp <rsch@ExperTeam.de>
-+  with further modifications by me
-+===============================================================================
-+Changes for patch v66
-+
-+- Yet more Unix98 pty support fixes (now tested)
-+
-+- Created <devfs_get_fops>
-+
-+- Support media change checks when CONFIG_DEVFS_ONLY=y
-+
-+- Abolished Unix98-style PTY names for old PTY devices
-+===============================================================================
-+Changes for patch v67
-+
-+- Added inline declaration for dummy <devfs_generate_path>
-+
-+- Removed spurious "unable to register... in devfs" messages when
-+  CONFIG_DEVFS_FS=n
-+
-+- Fixed misc. devices when CONFIG_DEVFS_FS=n
-+
-+- Limit auto-device numbering to majors 144 to 239
-+===============================================================================
-+Changes for patch v68
-+
-+- Hide unopened virtual consoles from directory listings
-+
-+- Added support for video capture devices
-+
-+- Ported to kernel 2.1.125
-+===============================================================================
-+Changes for patch v69
-+
-+- Fix for CONFIG_VT=n
-+===============================================================================
-+Changes for patch v70
-+
-+- Added support for non-OSS/Free sound cards
-+===============================================================================
-+Changes for patch v71
-+
-+- Ported to kernel 2.1.126-pre2
-+===============================================================================
-+Changes for patch v72
-+
-+- #ifdef's for CONFIG_DEVFS_DISABLE_OLD_NAMES removed
-+===============================================================================
-+Changes for patch v73
-+
-+- CONFIG_DEVFS_DISABLE_OLD_NAMES replaced with "nocompat" boot option
-+
-+- CONFIG_DEVFS_BOOT_OPTIONS removed: boot options always available
-+===============================================================================
-+Changes for patch v74
-+
-+- Removed CONFIG_DEVFS_MOUNT and "mount" boot option and replaced with
-+  "nomount" boot option
-+
-+- Documentation updates
-+
-+- Updated sample modules.conf
-+===============================================================================
-+Changes for patch v75
-+
-+- Updated sample modules.conf
-+
-+- Remount devfs after initrd finishes
-+
-+- Ported to kernel 2.1.127
-+
-+- Added support for ISDN
-+  Thanks to Christophe Leroy <christophe.leroy5@capway.com>
-+===============================================================================
-+Changes for patch v76
-+
-+- Updated an email address in ChangeLog
-+
-+- CONFIG_DEVFS_ONLY replaced with "only" boot option
-+===============================================================================
-+Changes for patch v77
-+
-+- Added DEVFS_FL_REMOVABLE flag
-+
-+- Check for disc change when listing directories with removable media
-+  devices
-+
-+- Use DEVFS_FL_REMOVABLE in sd.c
-+
-+- Ported to kernel 2.1.128
-+===============================================================================
-+Changes for patch v78
-+
-+- Only call <scan_dir_for_removable> on first call to <devfs_readdir>
-+
-+- Ported to kernel 2.1.129-pre5
-+
-+- ISDN support improvements
-+  Thanks to Christophe Leroy <christophe.leroy5@capway.com>
-+===============================================================================
-+Changes for patch v79
-+
-+- Ported to kernel 2.1.130
-+
-+- Renamed miscdevice "apm" to "apm_bios" to be consistent with
-+  devices.txt
-+===============================================================================
-+Changes for patch v80
-+
-+- Ported to kernel 2.1.131
-+
-+- Updated <devfs_rmdir> for VFS change in 2.1.131
-+===============================================================================
-+Changes for patch v81
-+
-+- Fixed permissions on /dev/ptmx
-+===============================================================================
-+Changes for patch v82
-+
-+- Ported to kernel 2.1.132-pre4
-+
-+- Changed initial permissions on /dev/pts/*
-+
-+- Created <devfs_mk_compat>
-+
-+- Added "symlinks" boot option
-+
-+- Changed devfs_register_blkdev() back to register_blkdev() for IDE
-+
-+- Check for partitions on removable media in <devfs_lookup>
-+===============================================================================
-+Changes for patch v83
-+
-+- Fixed support for ramdisc when using string-based root FS name
-+
-+- Ported to kernel 2.2.0-pre1
-+===============================================================================
-+Changes for patch v84
-+
-+- Ported to kernel 2.2.0-pre7
-+===============================================================================
-+Changes for patch v85
-+
-+- Compile fixes for driver/sound/sound_common.c (non-module) and
-+  drivers/isdn/isdn_common.c
-+  Thanks to Christophe Leroy <christophe.leroy5@capway.com>
-+
-+- Added support for registering regular files
-+
-+- Created <devfs_set_file_size>
-+
-+- Added /dev/cpu/mtrr as an alternative interface to /proc/mtrr
-+
-+- Update devfs inodes from entries if not changed through FS
-+===============================================================================
-+Changes for patch v86
-+
-+- Ported to kernel 2.2.0-pre9
-+===============================================================================
-+Changes for patch v87
-+
-+- Fixed bug when mounting non-devfs devices in a devfs
-+===============================================================================
-+Changes for patch v88
-+
-+- Fixed <devfs_fill_file> to only initialise temporary inodes
-+
-+- Trap for NULL fops in <devfs_register>
-+
-+- Return -ENODEV in <devfs_fill_file> for non-driver inodes
-+
-+- Fixed bug when unswapping non-devfs devices in a devfs
-+===============================================================================
-+Changes for patch v89
-+
-+- Switched to C data types in include/linux/devfs_fs.h
-+
-+- Switched from PATH_MAX to DEVFS_PATHLEN
-+
-+- Updated Documentation/filesystems/devfs/modules.conf to take account
-+  of reverse scanning (!) by modprobe
-+
-+- Ported to kernel 2.2.0
-+===============================================================================
-+Changes for patch v90
-+
-+- CONFIG_DEVFS_DISABLE_OLD_TTY_NAMES replaced with "nottycompat" boot
-+  option
-+
-+- CONFIG_DEVFS_TTY_COMPAT removed: existing "symlinks" boot option now
-+  controls this. This means you must have libc 5.4.44 or later, or a
-+  recent version of libc 6 if you use the "symlinks" option
-+===============================================================================
-+Changes for patch v91
-+
-+- Switch from <devfs_mk_symlink> to <devfs_mk_compat> in
-+  drivers/char/vc_screen.c to fix problems with Midnight Commander
-+===============================================================================
-+Changes for patch v92
-+
-+- Ported to kernel 2.2.2-pre5
-+===============================================================================
-+Changes for patch v93
-+
-+- Modified <sd_name> in drivers/scsi/sd.c to cope with devices that
-+  don't exist (which happens with new RAID autostart code printk()s)
-+===============================================================================
-+Changes for patch v94
-+
-+- Fixed bug in joystick driver: only first joystick was registered
-+===============================================================================
-+Changes for patch v95
-+
-+- Fixed another bug in joystick driver
-+
-+- Fixed <devfsd_read> to not overrun event buffer
-+===============================================================================
-+Changes for patch v96
-+
-+- Ported to kernel 2.2.5-2
-+
-+- Created <devfs_auto_unregister>
-+
-+- Fixed bugs: compatibility entries were not unregistered for:
-+    loop driver
-+    floppy driver
-+    RAMDISC driver
-+    IDE tape driver
-+    SCSI CD-ROM driver
-+    SCSI HDD driver
-+===============================================================================
-+Changes for patch v97
-+
-+- Fixed bugs: compatibility entries were not unregistered for:
-+    ALSA sound driver
-+    partitions in generic disc driver
-+
-+- Don't return unregistred entries in <devfs_find_handle>
-+
-+- Panic in <devfs_unregister> if entry unregistered
-+
-+- Don't panic in <devfs_auto_unregister> for duplicates
-+===============================================================================
-+Changes for patch v98
-+
-+- Don't unregister already unregistered entries in <unregister>
-+
-+- Register entry in <sd_detect>
-+
-+- Unregister entry in <sd_detach>
-+
-+- Changed to <devfs_*register_chrdev> in drivers/char/tty_io.c
-+
-+- Ported to kernel 2.2.7
-+===============================================================================
-+Changes for patch v99
-+
-+- Ported to kernel 2.2.8
-+
-+- Fixed bug in drivers/scsi/sd.c when >16 SCSI discs
-+
-+- Disable warning messages when unable to read partition table for
-+  removable media
-+===============================================================================
-+Changes for patch v100
-+
-+- Ported to kernel 2.3.1-pre5
-+
-+- Added "oops-on-panic" boot option
-+
-+- Improved debugging in <devfs_register> and <devfs_unregister>
-+
-+- Register entry in <sr_detect>
-+
-+- Unregister entry in <sr_detach>
-+
-+- Register entry in <sg_detect>
-+
-+- Unregister entry in <sg_detach>
-+
-+- Added support for ALSA drivers
-+===============================================================================
-+Changes for patch v101
-+
-+- Ported to kernel 2.3.2
-+===============================================================================
-+Changes for patch v102
-+
-+- Update serial driver to register PCMCIA entries
-+  Thanks to Roch-Alexandre Nomine-Beguin <roch@samarkand.infini.fr>
-+
-+- Updated an email address in ChangeLog
-+
-+- Hide virtual console capture entries from directory listings when
-+  corresponding console device is not open
-+===============================================================================
-+Changes for patch v103
-+
-+- Ported to kernel 2.3.3
-+===============================================================================
-+Changes for patch v104
-+
-+- Added documentation for some functions
-+
-+- Added "doc" target to fs/devfs/Makefile
-+
-+- Added "v4l" directory for video4linux devices
-+
-+- Replaced call to <devfs_unregister> in <sd_detach> with call to
-+  <devfs_register_partitions>
-+
-+- Moved registration for sr and sg drivers from detect() to attach()
-+  methods
-+
-+- Register entries in <st_attach> and unregister in <st_detach>
-+
-+- Work around IDE driver treating CD-ROM as gendisk
-+
-+- Use <sed> instead of <tr> in rc.devfs
-+
-+- Updated ToDo list
-+
-+- Removed "oops-on-panic" boot option: now always Oops
-+===============================================================================
-+Changes for patch v105
-+
-+- Unregister SCSI host from <scsi_host_no_list> in <scsi_unregister>
-+  Thanks to Zoltán Böszörményi <zboszor@mail.externet.hu>
-+
-+- Don't save /dev/log in rc.devfs
-+
-+- Ported to kernel 2.3.4-pre1
-+===============================================================================
-+Changes for patch v106
-+
-+- Fixed silly typo in drivers/scsi/st.c
-+
-+- Improved debugging in <devfs_register>
-+===============================================================================
-+Changes for patch v107
-+
-+- Added "diunlink" and "nokmod" boot options
-+
-+- Removed superfluous warning message in <devfs_d_iput>
-+===============================================================================
-+Changes for patch v108
-+
-+- Remove entries when unloading sound module
-+===============================================================================
-+Changes for patch v109
-+
-+- Ported to kernel 2.3.6-pre2
-+===============================================================================
-+Changes for patch v110
-+
-+- Took account of change to <d_alloc_root>
-+===============================================================================
-+Changes for patch v111
-+
-+- Created separate event queue for each mounted devfs
-+
-+- Removed <devfs_invalidate_dcache>
-+
-+- Created new ioctl()s for devfsd
-+
-+- Incremented devfsd protocol revision to 3
-+
-+- Fixed bug when re-creating directories: contents were lost
-+
-+- Block access to inodes until devfsd updates permissions
-+===============================================================================
-+Changes for patch v112
-+
-+- Modified patch so it applies against 2.3.5 and 2.3.6
-+
-+- Updated an email address in ChangeLog
-+
-+- Do not automatically change ownership/protection of /dev/tty<n>
-+
-+- Updated sample modules.conf
-+
-+- Switched to sending process uid/gid to devfsd
-+
-+- Renamed <call_kmod> to <try_modload>
-+
-+- Added DEVFSD_NOTIFY_LOOKUP event
-+
-+- Added DEVFSD_NOTIFY_CHANGE event
-+
-+- Added DEVFSD_NOTIFY_CREATE event
-+
-+- Incremented devfsd protocol revision to 4
-+
-+- Moved kernel-specific stuff to include/linux/devfs_fs_kernel.h
-+===============================================================================
-+Changes for patch v113
-+
-+- Ported to kernel 2.3.9
-+
-+- Restricted permissions on some block devices
-+===============================================================================
-+Changes for patch v114
-+
-+- Added support for /dev/netlink
-+  Thanks to Dennis Hou <smilax@mindmeld.yi.org>
-+
-+- Return EISDIR rather than EINVAL for read(2) on directories
-+
-+- Ported to kernel 2.3.10
-+===============================================================================
-+Changes for patch v115
-+
-+- Added support for all remaining character devices
-+  Thanks to Dennis Hou <smilax@mindmeld.yi.org>
-+
-+- Cleaned up netlink support
-+===============================================================================
-+Changes for patch v116
-+
-+- Added support for /dev/parport%d
-+  Thanks to Tim Waugh <tim@cyberelk.demon.co.uk>
-+
-+- Fixed parallel port ATAPI tape driver
-+
-+- Fixed Atari SLM laser printer driver
-+===============================================================================
-+Changes for patch v117
-+
-+- Added support for COSA card
-+  Thanks to Dennis Hou <smilax@mindmeld.yi.org>
-+
-+- Fixed drivers/char/ppdev.c: missing #include <linux/init.h>
-+
-+- Fixed drivers/char/ftape/zftape/zftape-init.c
-+  Thanks to Vladimir Popov <mashgrad@usa.net>
-+===============================================================================
-+Changes for patch v118
-+
-+- Ported to kernel 2.3.15-pre3
-+
-+- Fixed bug in loop driver
-+
-+- Unregister /dev/lp%d entries in drivers/char/lp.c
-+  Thanks to Maciej W. Rozycki <macro@ds2.pg.gda.pl>
-+===============================================================================
-+Changes for patch v119
-+
-+- Ported to kernel 2.3.16
-+===============================================================================
-+Changes for patch v120
-+
-+- Fixed bug in drivers/scsi/scsi.c
-+
-+- Added /dev/ppp
-+  Thanks to Dennis Hou <smilax@mindmeld.yi.org>
-+
-+- Ported to kernel 2.3.17
-+===============================================================================
-+Changes for patch v121
-+
-+- Fixed bug in drivers/block/loop.c
-+
-+- Ported to kernel 2.3.18
-+===============================================================================
-+Changes for patch v122
-+
-+- Ported to kernel 2.3.19
-+===============================================================================
-+Changes for patch v123
-+
-+- Ported to kernel 2.3.20
-+===============================================================================
-+Changes for patch v124
-+
-+- Ported to kernel 2.3.21
-+===============================================================================
-+Changes for patch v125
-+
-+- Created <devfs_get_info>, <devfs_set_info>,
-+  <devfs_get_first_child> and <devfs_get_next_sibling>
-+  Added <<dir>> parameter to <devfs_register>, <devfs_mk_compat>,
-+  <devfs_mk_dir> and <devfs_find_handle>
-+  Work sponsored by SGI
-+
-+- Fixed apparent bug in COSA driver
-+
-+- Re-instated "scsihosts=" boot option
-+===============================================================================
-+Changes for patch v126
-+
-+- Always create /dev/pts if CONFIG_UNIX98_PTYS=y
-+
-+- Fixed call to <devfs_mk_dir> in drivers/block/ide-disk.c
-+  Thanks to Dennis Hou <smilax@mindmeld.yi.org>
-+
-+- Allow multiple unregistrations
-+
-+- Created /dev/scsi hierarchy
-+  Work sponsored by SGI
-+===============================================================================
-+Changes for patch v127
-+
-+Work sponsored by SGI
-+
-+- No longer disable devpts if devfs enabled (caveat emptor)
-+
-+- Added flags array to struct gendisk and removed code from
-+  drivers/scsi/sd.c
-+
-+- Created /dev/discs hierarchy
-+===============================================================================
-+Changes for patch v128
-+
-+Work sponsored by SGI
-+
-+- Created /dev/cdroms hierarchy
-+===============================================================================
-+Changes for patch v129
-+
-+Work sponsored by SGI
-+
-+- Removed compatibility entries for sound devices
-+
-+- Removed compatibility entries for printer devices
-+
-+- Removed compatibility entries for video4linux devices
-+
-+- Removed compatibility entries for parallel port devices
-+
-+- Removed compatibility entries for frame buffer devices
-+===============================================================================
-+Changes for patch v130
-+
-+Work sponsored by SGI
-+
-+- Added major and minor number to devfsd protocol
-+
-+- Incremented devfsd protocol revision to 5
-+
-+- Removed compatibility entries for SoundBlaster CD-ROMs
-+
-+- Removed compatibility entries for netlink devices
-+
-+- Removed compatibility entries for SCSI generic devices
-+
-+- Removed compatibility entries for SCSI tape devices
-+===============================================================================
-+Changes for patch v131
-+
-+Work sponsored by SGI
-+
-+- Support info pointer for all devfs entry types
-+
-+- Added <<info>> parameter to <devfs_mk_dir> and <devfs_mk_symlink>
-+
-+- Removed /dev/st hierarchy
-+
-+- Removed /dev/sg hierarchy
-+
-+- Removed compatibility entries for loop devices
-+
-+- Removed compatibility entries for IDE tape devices
-+
-+- Removed compatibility entries for SCSI CD-ROMs
-+
-+- Removed /dev/sr hierarchy
-+===============================================================================
-+Changes for patch v132
-+
-+Work sponsored by SGI
-+
-+- Removed compatibility entries for floppy devices
-+
-+- Removed compatibility entries for RAMDISCs
-+
-+- Removed compatibility entries for meta-devices
-+
-+- Removed compatibility entries for SCSI discs
-+
-+- Created <devfs_make_root>
-+
-+- Removed /dev/sd hierarchy
-+
-+- Support "../" when searching devfs namespace
-+
-+- Created /dev/ide/host* hierarchy
-+
-+- Supported IDE hard discs in /dev/ide/host* hierarchy
-+
-+- Removed compatibility entries for IDE discs
-+
-+- Removed /dev/ide/hd hierarchy
-+
-+- Supported IDE CD-ROMs in /dev/ide/host* hierarchy
-+
-+- Removed compatibility entries for IDE CD-ROMs
-+
-+- Removed /dev/ide/cd hierarchy
-+===============================================================================
-+Changes for patch v133
-+
-+Work sponsored by SGI
-+
-+- Created <devfs_get_unregister_slave>
-+
-+- Fixed bug in fs/partitions/check.c when rescanning
-+===============================================================================
-+Changes for patch v134
-+
-+Work sponsored by SGI
-+
-+- Removed /dev/sd, /dev/sr, /dev/st and /dev/sg directories
-+
-+- Removed /dev/ide/hd directory
-+
-+- Exported <devfs_get_parent>
-+
-+- Created <devfs_register_tape> and /dev/tapes hierarchy
-+
-+- Removed /dev/ide/mt hierarchy
-+
-+- Removed /dev/ide/fd hierarchy
-+
-+- Ported to kernel 2.3.25
-+===============================================================================
-+Changes for patch v135
-+
-+Work sponsored by SGI
-+
-+- Removed compatibility entries for virtual console capture devices
-+
-+- Removed unused <devfs_set_symlink_destination>
-+
-+- Removed compatibility entries for serial devices
-+
-+- Removed compatibility entries for console devices
-+
-+- Do not hide entries from devfsd or children
-+
-+- Removed DEVFS_FL_TTY_COMPAT flag
-+
-+- Removed "nottycompat" boot option
-+
-+- Removed <devfs_mk_compat>
-+===============================================================================
-+Changes for patch v136
-+
-+Work sponsored by SGI
-+
-+- Moved BSD pty devices to /dev/pty
-+
-+- Added DEVFS_FL_WAIT flag
-+===============================================================================
-+Changes for patch v137
-+
-+Work sponsored by SGI
-+
-+- Really fixed bug in fs/partitions/check.c when rescanning
-+
-+- Support new "disc" naming scheme in <get_removable_partition>
-+
-+- Allow NULL fops in <devfs_register>
-+
-+- Removed redundant name functions in SCSI disc and IDE drivers
-+===============================================================================
-+Changes for patch v138
-+
-+Work sponsored by SGI
-+
-+- Fixed old bugs in drivers/block/paride/pt.c, drivers/char/tpqic02.c,
-+  drivers/net/wan/cosa.c and drivers/scsi/scsi.c
-+  Thanks to Sergey Kubushin <ksi@ksi-linux.com>
-+
-+- Fall back to major table if NULL fops given to <devfs_register>
-+===============================================================================
-+Changes for patch v139
-+
-+Work sponsored by SGI
-+
-+- Corrected and moved <get_blkfops> and <get_chrfops> declarations
-+  from arch/alpha/kernel/osf_sys.c to include/linux/fs.h
-+
-+- Removed name function from struct gendisk
-+
-+- Updated devfs FAQ
-+===============================================================================
-+Changes for patch v140
-+
-+Work sponsored by SGI
-+
-+- Ported to kernel 2.3.27
-+===============================================================================
-+Changes for patch v141
-+
-+Work sponsored by SGI
-+
-+- Bug fix in arch/m68k/atari/joystick.c
-+
-+- Moved ISDN and capi devices to /dev/isdn
-+===============================================================================
-+Changes for patch v142
-+
-+Work sponsored by SGI
-+
-+- Bug fix in drivers/block/ide-probe.c (patch confusion)
-+===============================================================================
-+Changes for patch v143
-+
-+Work sponsored by SGI
-+
-+- Bug fix in drivers/block/blkpg.c:partition_name()
-+===============================================================================
-+Changes for patch v144
-+
-+Work sponsored by SGI
-+
-+- Ported to kernel 2.3.29
-+
-+- Removed calls to <devfs_register> from cdu31a, cm206, mcd and mcdx
-+  CD-ROM drivers: generic driver handles this now
-+
-+- Moved joystick devices to /dev/joysticks
-+===============================================================================
-+Changes for patch v145
-+
-+Work sponsored by SGI
-+
-+- Ported to kernel 2.3.30-pre3
-+
-+- Register whole-disc entry even for invalid partition tables
-+
-+- Fixed bug in mounting root FS when initrd enabled
-+
-+- Fixed device entry leak with IDE CD-ROMs
-+
-+- Fixed compile problem with drivers/isdn/isdn_common.c
-+
-+- Moved COSA devices to /dev/cosa
-+
-+- Support fifos when unregistering
-+
-+- Created <devfs_register_series> and used in many drivers
-+
-+- Moved Coda devices to /dev/coda
-+
-+- Moved parallel port IDE tapes to /dev/pt
-+
-+- Moved parallel port IDE generic devices to /dev/pg
-+===============================================================================
-+Changes for patch v146
-+
-+Work sponsored by SGI
-+
-+- Removed obsolete DEVFS_FL_COMPAT and DEVFS_FL_TOLERANT flags
-+
-+- Fixed compile problem with fs/coda/psdev.c
-+
-+- Reinstate change to <devfs_register_blkdev> in
-+  drivers/block/ide-probe.c now that fs/isofs/inode.c is fixed
-+
-+- Switched to <devfs_register_blkdev> in drivers/block/floppy.c,
-+  drivers/scsi/sr.c and drivers/block/md.c
-+
-+- Moved DAC960 devices to /dev/dac960
-+===============================================================================
-+Changes for patch v147
-+
-+Work sponsored by SGI
-+
-+- Ported to kernel 2.3.32-pre4
-+===============================================================================
-+Changes for patch v148
-+
-+Work sponsored by SGI
-+
-+- Removed kmod support: use devfsd instead
-+
-+- Moved miscellaneous character devices to /dev/misc
-+===============================================================================
-+Changes for patch v149
-+
-+Work sponsored by SGI
-+
-+- Ensure include/linux/joystick.h is OK for user-space
-+
-+- Improved debugging in <get_vfs_inode>
-+
-+- Ensure dentries created by devfsd will be cleaned up
-+===============================================================================
-+Changes for patch v150
-+
-+Work sponsored by SGI
-+
-+- Ported to kernel 2.3.34
-+===============================================================================
-+Changes for patch v151
-+
-+Work sponsored by SGI
-+
-+- Ported to kernel 2.3.35-pre1
-+
-+- Created <devfs_get_name>
-+===============================================================================
-+Changes for patch v152
-+
-+Work sponsored by SGI
-+
-+- Updated sample modules.conf
-+
-+- Ported to kernel 2.3.36-pre1
-+===============================================================================
-+Changes for patch v153
-+
-+Work sponsored by SGI
-+
-+- Ported to kernel 2.3.42
-+
-+- Removed <devfs_fill_file>
-+===============================================================================
-+Changes for patch v154
-+
-+Work sponsored by SGI
-+
-+- Took account of device number changes for /dev/fb*
-+===============================================================================
-+Changes for patch v155
-+
-+Work sponsored by SGI
-+
-+- Ported to kernel 2.3.43-pre8
-+
-+- Moved /dev/tty0 to /dev/vc/0
-+
-+- Moved sequence number formatting from <_tty_make_name> to drivers
-+===============================================================================
-+Changes for patch v156
-+
-+Work sponsored by SGI
-+
-+- Fixed breakage in drivers/scsi/sd.c due to recent SCSI changes
-+===============================================================================
-+Changes for patch v157
-+
-+Work sponsored by SGI
-+
-+- Ported to kernel 2.3.45
-+===============================================================================
-+Changes for patch v158
-+
-+Work sponsored by SGI
-+
-+- Ported to kernel 2.3.46-pre2
-+===============================================================================
-+Changes for patch v159
-+
-+Work sponsored by SGI
-+
-+- Fixed drivers/block/md.c
-+  Thanks to Mike Galbraith <mikeg@weiden.de>
-+
-+- Documentation fixes
-+
-+- Moved device registration from <lp_init> to <lp_register>
-+  Thanks to Tim Waugh <twaugh@redhat.com>
-+===============================================================================
-+Changes for patch v160
-+
-+Work sponsored by SGI
-+
-+- Fixed drivers/char/joystick/joystick.c
-+  Thanks to Vojtech Pavlik <vojtech@suse.cz>
-+
-+- Documentation updates
-+
-+- Fixed arch/i386/kernel/mtrr.c if procfs and devfs not enabled
-+
-+- Fixed drivers/char/stallion.c
-+===============================================================================
-+Changes for patch v161
-+
-+Work sponsored by SGI
-+
-+- Remove /dev/ide when ide-mod is unloaded
-+
-+- Fixed bug in drivers/block/ide-probe.c when secondary but no primary
-+
-+- Added DEVFS_FL_NO_PERSISTENCE flag
-+
-+- Used new DEVFS_FL_NO_PERSISTENCE flag for Unix98 pty slaves
-+
-+- Removed unnecessary call to <update_devfs_inode_from_entry> in
-+  <devfs_readdir>
-+
-+- Only set auto-ownership for /dev/pty/s*
-+===============================================================================
-+Changes for patch v162
-+
-+Work sponsored by SGI
-+
-+- Set inode->i_size to correct size for symlinks
-+  Thanks to Jeremy Fitzhardinge <jeremy@goop.org>
-+
-+- Only give lookup() method to directories to comply with new VFS
-+  assumptions
-+
-+- Remove unnecessary tests in symlink methods
-+
-+- Don't kill existing block ops in <devfs_read_inode>
-+
-+- Restore auto-ownership for /dev/pty/m*
-+===============================================================================
-+Changes for patch v163
-+
-+Work sponsored by SGI
-+
-+- Don't create missing directories in <devfs_find_handle>
-+
-+- Removed Documentation/filesystems/devfs/mk-devlinks
-+
-+- Updated Documentation/filesystems/devfs/README
-+===============================================================================
-+Changes for patch v164
-+
-+Work sponsored by SGI
-+
-+- Fixed CONFIG_DEVFS breakage in drivers/char/serial.c introduced in
-+  linux-2.3.99-pre6-7
-+===============================================================================
-+Changes for patch v165
-+
-+Work sponsored by SGI
-+
-+- Ported to kernel 2.3.99-pre6
-+===============================================================================
-+Changes for patch v166
-+
-+Work sponsored by SGI
-+
-+- Added CONFIG_DEVFS_MOUNT
-+===============================================================================
-+Changes for patch v167
-+
-+Work sponsored by SGI
-+
-+- Updated Documentation/filesystems/devfs/README
-+
-+- Updated sample modules.conf
-+===============================================================================
-+Changes for patch v168
-+
-+Work sponsored by SGI
-+
-+- Disabled multi-mount capability (use VFS bindings instead)
-+
-+- Updated README from master HTML file
-+===============================================================================
-+Changes for patch v169
-+
-+Work sponsored by SGI
-+
-+- Removed multi-mount code
-+
-+- Removed compatibility macros: VFS has changed too much
-+===============================================================================
-+Changes for patch v170
-+
-+Work sponsored by SGI
-+
-+- Updated README from master HTML file
-+
-+- Merged devfs inode into devfs entry
-+===============================================================================
-+Changes for patch v171
-+
-+Work sponsored by SGI
-+
-+- Updated sample modules.conf
-+
-+- Removed dead code in <devfs_register> which used to call
-+  <free_dentries>
-+
-+- Ported to kernel 2.4.0-test2-pre3
-+===============================================================================
-+Changes for patch v172
-+
-+Work sponsored by SGI
-+
-+- Changed interface to <devfs_register>
-+
-+- Changed interface to <devfs_register_series>
-+===============================================================================
-+Changes for patch v173
-+
-+Work sponsored by SGI
-+
-+- Simplified interface to <devfs_mk_symlink>
-+
-+- Simplified interface to <devfs_mk_dir>
-+
-+- Simplified interface to <devfs_find_handle>
-+===============================================================================
-+Changes for patch v174
-+
-+Work sponsored by SGI
-+
-+- Updated README from master HTML file
-+===============================================================================
-+Changes for patch v175
-+
-+Work sponsored by SGI
-+
-+- DocBook update for fs/devfs/base.c
-+  Thanks to Tim Waugh <twaugh@redhat.com>
-+
-+- Removed stale fs/tunnel.c (was never used or completed)
-+===============================================================================
-+Changes for patch v176
-+
-+Work sponsored by SGI
-+
-+- Updated ToDo list
-+
-+- Removed sample modules.conf: now distributed with devfsd
-+
-+- Updated README from master HTML file
-+
-+- Ported to kernel 2.4.0-test3-pre4 (which had devfs-patch-v174)
-+===============================================================================
-+Changes for patch v177
-+
-+- Updated README from master HTML file
-+
-+- Documentation cleanups
-+
-+- Ensure <devfs_generate_path> terminates string for root entry
-+  Thanks to Tim Jansen <tim@tjansen.de>
-+
-+- Exported <devfs_get_name> to modules
-+
-+- Make <devfs_mk_symlink> send events to devfsd
-+
-+- Cleaned up option processing in <devfs_setup>
-+
-+- Fixed bugs in handling symlinks: could leak or cause Oops
-+
-+- Cleaned up directory handling by separating fops
-+  Thanks to Alexander Viro <viro@parcelfarce.linux.theplanet.co.uk>
-+===============================================================================
-+Changes for patch v178
-+
-+- Fixed handling of inverted options in <devfs_setup>
-+===============================================================================
-+Changes for patch v179
-+
-+- Adjusted <try_modload> to account for <devfs_generate_path> fix
-+===============================================================================
-+Changes for patch v180
-+
-+- Fixed !CONFIG_DEVFS_FS stub declaration of <devfs_get_info>
-+===============================================================================
-+Changes for patch v181
-+
-+- Answered question posed by Al Viro and removed his comments from <devfs_open>
-+
-+- Moved setting of registered flag after other fields are changed
-+
-+- Fixed race between <devfsd_close> and <devfsd_notify_one>
-+
-+- Global VFS changes added bogus BKL to devfsd_close(): removed
-+
-+- Widened locking in <devfs_readlink> and <devfs_follow_link>
-+
-+- Replaced <devfsd_read> stack usage with <devfsd_ioctl> kmalloc
-+
-+- Simplified locking in <devfsd_ioctl> and fixed memory leak
-+===============================================================================
-+Changes for patch v182
-+
-+- Created <devfs_*alloc_major> and <devfs_*alloc_devnum>
-+
-+- Removed broken devnum allocation and use <devfs_alloc_devnum>
-+
-+- Fixed old devnum leak by calling new <devfs_dealloc_devnum>
-+
-+- Created <devfs_*alloc_unique_number>
-+
-+- Fixed number leak for /dev/cdroms/cdrom%d
-+
-+- Fixed number leak for /dev/discs/disc%d
-+===============================================================================
-+Changes for patch v183
-+
-+- Fixed bug in <devfs_setup> which could hang boot process
-+===============================================================================
-+Changes for patch v184
-+
-+- Documentation typo fix for fs/devfs/util.c
-+
-+- Fixed drivers/char/stallion.c for devfs
-+
-+- Added DEVFSD_NOTIFY_DELETE event
-+
-+- Updated README from master HTML file
-+
-+- Removed #include <asm/segment.h> from fs/devfs/base.c
-+===============================================================================
-+Changes for patch v185
-+
-+- Made <block_semaphore> and <char_semaphore> in fs/devfs/util.c
-+  private
-+
-+- Fixed inode table races by removing it and using inode->u.generic_ip
-+  instead
-+
-+- Moved <devfs_read_inode> into <get_vfs_inode>
-+
-+- Moved <devfs_write_inode> into <devfs_notify_change>
-+===============================================================================
-+Changes for patch v186
-+
-+- Fixed race in <devfs_do_symlink> for uni-processor
-+
-+- Updated README from master HTML file
-+===============================================================================
-+Changes for patch v187
-+
-+- Fixed drivers/char/stallion.c for devfs
-+
-+- Fixed drivers/char/rocket.c for devfs
-+
-+- Fixed bug in <devfs_alloc_unique_number>: limited to 128 numbers
-+===============================================================================
-+Changes for patch v188
-+
-+- Updated major masks in fs/devfs/util.c up to Linus' "no new majors"
-+  proclamation. Block: were 126 now 122 free, char: were 26 now 19 free
-+
-+- Updated README from master HTML file
-+
-+- Removed remnant of multi-mount support in <devfs_mknod>
-+
-+- Removed unused DEVFS_FL_SHOW_UNREG flag
-+===============================================================================
-+Changes for patch v189
-+
-+- Removed nlink field from struct devfs_inode
-+
-+- Removed auto-ownership for /dev/pty/* (BSD ptys) and used
-+  DEVFS_FL_CURRENT_OWNER|DEVFS_FL_NO_PERSISTENCE for /dev/pty/s* (just
-+  like Unix98 pty slaves) and made /dev/pty/m* rw-rw-rw- access
-+===============================================================================
-+Changes for patch v190
-+
-+- Updated README from master HTML file
-+
-+- Replaced BKL with global rwsem to protect symlink data (quick and
-+  dirty hack)
-+===============================================================================
-+Changes for patch v191
-+
-+- Replaced global rwsem for symlink with per-link refcount
-+===============================================================================
-+Changes for patch v192
-+
-+- Removed unnecessary #ifdef CONFIG_DEVFS_FS from arch/i386/kernel/mtrr.c
-+
-+- Ported to kernel 2.4.10-pre11
-+
-+- Set inode->i_mapping->a_ops for block nodes in <get_vfs_inode>
-+===============================================================================
-+Changes for patch v193
-+
-+- Went back to global rwsem for symlinks (refcount scheme no good)
-+===============================================================================
-+Changes for patch v194
-+
-+- Fixed overrun in <devfs_link> by removing function (not needed)
-+
-+- Updated README from master HTML file
-+===============================================================================
-+Changes for patch v195
-+
-+- Fixed buffer underrun in <try_modload>
-+
-+- Moved down_read() from <search_for_entry_in_dir> to <find_entry>
-+===============================================================================
-+Changes for patch v196
-+
-+- Fixed race in <devfsd_ioctl> when setting event mask
-+  Thanks to Kari Hurtta <hurtta@leija.mh.fmi.fi>
-+
-+- Avoid deadlock in <devfs_follow_link> by using temporary buffer
-+===============================================================================
-+Changes for patch v197
-+
-+- First release of new locking code for devfs core (v1.0)
-+
-+- Fixed bug in drivers/cdrom/cdrom.c
-+===============================================================================
-+Changes for patch v198
-+
-+- Discard temporary buffer, now use "%s" for dentry names
-+
-+- Don't generate path in <try_modload>: use fake entry instead
-+
-+- Use "existing" directory in <_devfs_make_parent_for_leaf>
-+
-+- Use slab cache rather than fixed buffer for devfsd events
-+===============================================================================
-+Changes for patch v199
-+
-+- Removed obsolete usage of DEVFS_FL_NO_PERSISTENCE
-+
-+- Send DEVFSD_NOTIFY_REGISTERED events in <devfs_mk_dir>
-+
-+- Fixed locking bug in <devfs_d_revalidate_wait> due to typo
-+
-+- Do not send CREATE, CHANGE, ASYNC_OPEN or DELETE events from devfsd
-+  or children
-+===============================================================================
-+Changes for patch v200
-+
-+- Ported to kernel 2.5.1-pre2
-+===============================================================================
-+Changes for patch v201
-+
-+- Fixed bug in <devfsd_read>: was dereferencing freed pointer
-+===============================================================================
-+Changes for patch v202
-+
-+- Fixed bug in <devfsd_close>: was dereferencing freed pointer
-+
-+- Added process group check for devfsd privileges
-+===============================================================================
-+Changes for patch v203
-+
-+- Use SLAB_ATOMIC in <devfsd_notify_de> from <devfs_d_delete>
-+===============================================================================
-+Changes for patch v204
-+
-+- Removed long obsolete rc.devfs
-+
-+- Return old entry in <devfs_mk_dir> for 2.4.x kernels
-+
-+- Updated README from master HTML file
-+
-+- Increment refcount on module in <check_disc_changed>
-+
-+- Created <devfs_get_handle> and exported <devfs_put>
-+
-+- Increment refcount on module in <devfs_get_ops>
-+
-+- Created <devfs_put_ops> and used where needed to fix races
-+
-+- Added clarifying comments in response to preliminary EMC code review
-+
-+- Added poisoning to <devfs_put>
-+
-+- Improved debugging messages
-+
-+- Fixed unregister bugs in drivers/md/lvm-fs.c
-+===============================================================================
-+Changes for patch v205
-+
-+- Corrected (made useful) debugging message in <unregister>
-+
-+- Moved <kmem_cache_create> in <mount_devfs_fs> to <init_devfs_fs>
-+
-+- Fixed drivers/md/lvm-fs.c to create "lvm" entry
-+
-+- Added magic number to guard against scribbling drivers
-+
-+- Only return old entry in <devfs_mk_dir> if a directory
-+
-+- Defined macros for error and debug messages
-+
-+- Updated README from master HTML file
-+===============================================================================
-+Changes for patch v206
-+
-+- Added support for multiple Compaq cpqarray controllers
-+
-+- Fixed (rare, old) race in <devfs_lookup>
-+===============================================================================
-+Changes for patch v207
-+
-+- Fixed deadlock bug in <devfs_d_revalidate_wait>
-+
-+- Tag VFS deletable in <devfs_mk_symlink> if handle ignored
-+
-+- Updated README from master HTML file
-+===============================================================================
-+Changes for patch v208
-+
-+- Added KERN_* to remaining messages
-+
-+- Cleaned up declaration of <stat_read>
-+
-+- Updated README from master HTML file
-+===============================================================================
-+Changes for patch v209
-+
-+- Updated README from master HTML file
-+
-+- Removed silently introduced calls to lock_kernel() and
-+  unlock_kernel() due to recent VFS locking changes. BKL isn't
-+  required in devfs 
-+
-+- Changed <devfs_rmdir> to allow later additions if not yet empty
-+
-+- Added calls to <devfs_register_partitions> in drivers/block/blkpc.c
-+  <add_partition> and <del_partition>
-+
-+- Fixed bug in <devfs_alloc_unique_number>: was clearing beyond
-+  bitfield
-+
-+- Fixed bitfield data type for <devfs_*alloc_devnum>
-+
-+- Made major bitfield type and initialiser 64 bit safe
-+===============================================================================
-+Changes for patch v210
-+
-+- Updated fs/devfs/util.c to fix shift warning on 64 bit machines
-+  Thanks to Anton Blanchard <anton@samba.org>
-+
-+- Updated README from master HTML file
-+===============================================================================
-+Changes for patch v211
-+
-+- Do not put miscellaneous character devices in /dev/misc if they
-+  specify their own directory (i.e. contain a '/' character)
-+
-+- Copied macro for error messages from fs/devfs/base.c to
-+  fs/devfs/util.c and made use of this macro
-+
-+- Removed 2.4.x compatibility code from fs/devfs/base.c
-+===============================================================================
-+Changes for patch v212
-+
-+- Added BKL to <devfs_open> because drivers still need it
-+===============================================================================
-+Changes for patch v213
-+
-+- Protected <scan_dir_for_removable> and <get_removable_partition>
-+  from changing directory contents
-+===============================================================================
-+Changes for patch v214
-+
-+- Switched to ISO C structure field initialisers
-+
-+- Switch to set_current_state() and move before add_wait_queue()
-+
-+- Updated README from master HTML file
-+
-+- Fixed devfs entry leak in <devfs_readdir> when *readdir fails
-+===============================================================================
-+Changes for patch v215
-+
-+- Created <devfs_find_and_unregister>
-+
-+- Switched many functions from <devfs_find_handle> to
-+  <devfs_find_and_unregister>
-+
-+- Switched many functions from <devfs_find_handle> to <devfs_get_handle>
-+===============================================================================
-+Changes for patch v216
-+
-+- Switched arch/ia64/sn/io/hcl.c from <devfs_find_handle> to
-+  <devfs_get_handle>
-+
-+- Removed deprecated <devfs_find_handle>
-+===============================================================================
-+Changes for patch v217
-+
-+- Exported <devfs_find_and_unregister> and <devfs_only> to modules
-+
-+- Updated README from master HTML file
-+
-+- Fixed module unload race in <devfs_open>
-+===============================================================================
-+Changes for patch v218
-+
-+- Removed DEVFS_FL_AUTO_OWNER flag
-+
-+- Switched lingering structure field initialiser to ISO C
-+
-+- Added locking when setting/clearing flags
-+
-+- Documentation fix in fs/devfs/util.c
-diff -urN linux-2.6.19.old/Documentation/filesystems/devfs/README linux-2.6.19.dev/Documentation/filesystems/devfs/README
---- linux-2.6.19.old/Documentation/filesystems/devfs/README	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.19.dev/Documentation/filesystems/devfs/README	2006-12-14 03:12:59.000000000 +0100
-@@ -0,0 +1,1959 @@
-+Devfs (Device File System) FAQ
-+
-+
-+Linux Devfs (Device File System) FAQ
-+Richard Gooch
-+20-AUG-2002
-+
-+
-+Document languages:
-+
-+
-+
-+
-+
-+
-+
-+-----------------------------------------------------------------------------
-+
-+NOTE: the master copy of this document is available online at:
-+
-+http://www.atnf.csiro.au/~rgooch/linux/docs/devfs.html
-+and looks much better than the text version distributed with the
-+kernel sources. A mirror site is available at:
-+
-+http://www.ras.ucalgary.ca/~rgooch/linux/docs/devfs.html
-+
-+There is also an optional daemon that may be used with devfs. You can
-+find out more about it at:
-+
-+http://www.atnf.csiro.au/~rgooch/linux/
-+
-+A mailing list is available which you may subscribe to. Send
-+email
-+to majordomo@oss.sgi.com with the following line in the
-+body of the message:
-+subscribe devfs
-+To unsubscribe, send the message body:
-+unsubscribe devfs
-+instead. The list is archived at
-+
-+http://oss.sgi.com/projects/devfs/archive/.
-+
-+-----------------------------------------------------------------------------
-+
-+Contents
-+
-+
-+What is it?
-+
-+Why do it?
-+
-+Who else does it?
-+
-+How it works
-+
-+Operational issues (essential reading)
-+
-+Instructions for the impatient
-+Permissions persistence across reboots
-+Dealing with drivers without devfs support
-+All the way with Devfs
-+Other Issues
-+Kernel Naming Scheme
-+Devfsd Naming Scheme
-+Old Compatibility Names
-+SCSI Host Probing Issues
-+
-+
-+
-+Device drivers currently ported
-+
-+Allocation of Device Numbers
-+
-+Questions and Answers
-+
-+Making things work
-+Alternatives to devfs
-+What I don't like about devfs
-+How to report bugs
-+Strange kernel messages
-+Compilation problems with devfsd
-+
-+
-+Other resources
-+
-+Translations of this document
-+
-+
-+-----------------------------------------------------------------------------
-+
-+
-+What is it?
-+
-+Devfs is an alternative to "real" character and block special devices
-+on your root filesystem. Kernel device drivers can register devices by
-+name rather than major and minor numbers. These devices will appear in
-+devfs automatically, with whatever default ownership and
-+protection the driver specified. A daemon (devfsd) can be used to
-+override these defaults. Devfs has been in the kernel since 2.3.46.
-+
-+NOTE that devfs is entirely optional. If you prefer the old
-+disc-based device nodes, then simply leave CONFIG_DEVFS_FS=n (the
-+default). In this case, nothing will change.  ALSO NOTE that if you do
-+enable devfs, the defaults are such that full compatibility is
-+maintained with the old devices names.
-+
-+There are two aspects to devfs: one is the underlying device
-+namespace, which is a namespace just like any mounted filesystem. The
-+other aspect is the filesystem code which provides a view of the
-+device namespace. The reason I make a distinction is because devfs
-+can be mounted many times, with each mount showing the same device
-+namespace. Changes made are global to all mounted devfs filesystems.
-+Also, because the devfs namespace exists without any devfs mounts, you
-+can easily mount the root filesystem by referring to an entry in the
-+devfs namespace.
-+
-+
-+The cost of devfs is a small increase in kernel code size and memory
-+usage. About 7 pages of code (some of that in __init sections) and 72
-+bytes for each entry in the namespace. A modest system has only a
-+couple of hundred device entries, so this costs a few more
-+pages. Compare this with the suggestion to put /dev on a <a
-+href="#why-faq-ramdisc">ramdisc.
-+
-+On a typical machine, the cost is under 0.2 percent. On a modest
-+system with 64 MBytes of RAM, the cost is under 0.1 percent.  The
-+accusations of "bloatware" levelled at devfs are not justified.
-+
-+-----------------------------------------------------------------------------
-+
-+
-+Why do it?
-+
-+There are several problems that devfs addresses. Some of these
-+problems are more serious than others (depending on your point of
-+view), and some can be solved without devfs. However, the totality of
-+these problems really calls out for devfs.
-+
-+The choice is a patchwork of inefficient user space solutions, which
-+are complex and likely to be fragile, or to use a simple and efficient
-+devfs which is robust.
-+
-+There have been many counter-proposals to devfs, all seeking to
-+provide some of the benefits without actually implementing devfs. So
-+far there has been an absence of code and no proposed alternative has
-+been able to provide all the features that devfs does. Further,
-+alternative proposals require far more complexity in user-space (and
-+still deliver less functionality than devfs). Some people have the
-+mantra of reducing "kernel bloat", but don't consider the effects on
-+user-space.
-+
-+A good solution limits the total complexity of kernel-space and
-+user-space.
-+
-+
-+Major&minor allocation
-+
-+The existing scheme requires the allocation of major and minor device
-+numbers for each and every device. This means that a central
-+co-ordinating authority is required to issue these device numbers
-+(unless you're developing a "private" device driver), in order to
-+preserve uniqueness. Devfs shifts the burden to a namespace. This may
-+not seem like a huge benefit, but actually it is. Since driver authors
-+will naturally choose a device name which reflects the functionality
-+of the device, there is far less potential for namespace conflict.
-+Solving this requires a kernel change.
-+
-+/dev management
-+
-+Because you currently access devices through device nodes, these must
-+be created by the system administrator. For standard devices you can
-+usually find a MAKEDEV programme which creates all these (hundreds!)
-+of nodes. This means that changes in the kernel must be reflected by
-+changes in the MAKEDEV programme, or else the system administrator
-+creates device nodes by hand.
-+
-+The basic problem is that there are two separate databases of
-+major and minor numbers. One is in the kernel and one is in /dev (or
-+in a MAKEDEV programme, if you want to look at it that way). This is
-+duplication of information, which is not good practice.
-+Solving this requires a kernel change.
-+
-+/dev growth
-+
-+A typical /dev has over 1200 nodes! Most of these devices simply don't
-+exist because the hardware is not available. A huge /dev increases the
-+time to access devices (I'm just referring to the dentry lookup times
-+and the time taken to read inodes off disc: the next subsection shows
-+some more horrors).
-+
-+An example of how big /dev can grow is if we consider SCSI devices:
-+
-+host           6  bits  (say up to 64 hosts on a really big machine)
-+channel        4  bits  (say up to 16 SCSI buses per host)
-+id             4  bits
-+lun            3  bits
-+partition      6  bits
-+TOTAL          23 bits
-+
-+
-+This requires 8 Mega (1024*1024) inodes if we want to store all
-+possible device nodes. Even if we scrap everything but id,partition
-+and assume a single host adapter with a single SCSI bus and only one
-+logical unit per SCSI target (id), that's still 10 bits or 1024
-+inodes. Each VFS inode takes around 256 bytes (kernel 2.1.78), so
-+that's 256 kBytes of inode storage on disc (assuming real inodes take
-+a similar amount of space as VFS inodes). This is actually not so bad,
-+because disc is cheap these days. Embedded systems would care about
-+256 kBytes of /dev inodes, but you could argue that embedded systems
-+would have hand-tuned /dev directories. I've had to do just that on my
-+embedded systems, but I would rather just leave it to devfs.
-+
-+Another issue is the time taken to lookup an inode when first
-+referenced. Not only does this take time in scanning through a list in
-+memory, but also the seek times to read the inodes off disc.
-+This could be solved in user-space using a clever programme which
-+scanned the kernel logs and deleted /dev entries which are not
-+available and created them when they were available. This programme
-+would need to be run every time a new module was loaded, which would
-+slow things down a lot.
-+
-+There is an existing programme called scsidev which will automatically
-+create device nodes for SCSI devices. It can do this by scanning files
-+in /proc/scsi. Unfortunately, to extend this idea to other device
-+nodes would require significant modifications to existing drivers (so
-+they too would provide information in /proc). This is a non-trivial
-+change (I should know: devfs has had to do something similar). Once
-+you go to this much effort, you may as well use devfs itself (which
-+also provides this information).  Furthermore, such a system would
-+likely be implemented in an ad-hoc fashion, as different drivers will
-+provide their information in different ways.
-+
-+Devfs is much cleaner, because it (naturally) has a uniform mechanism
-+to provide this information: the device nodes themselves!
-+
-+
-+Node to driver file_operations translation
-+
-+There is an important difference between the way disc-based character
-+and block nodes and devfs entries make the connection between an entry
-+in /dev and the actual device driver.
-+
-+With the current 8 bit major and minor numbers the connection between
-+disc-based c&b nodes and per-major drivers is done through a
-+fixed-length table of 128 entries. The various filesystem types set
-+the inode operations for c&b nodes to {chr,blk}dev_inode_operations,
-+so when a device is opened a few quick levels of indirection bring us
-+to the driver file_operations.
-+
-+For miscellaneous character devices a second step is required: there
-+is a scan for the driver entry with the same minor number as the file
-+that was opened, and the appropriate minor open method is called. This
-+scanning is done *every time* you open a device node. Potentially, you
-+may be searching through dozens of misc. entries before you find your
-+open method. While not an enormous performance overhead, this does
-+seem pointless.
-+
-+Linux *must* move beyond the 8 bit major and minor barrier,
-+somehow. If we simply increase each to 16 bits, then the indexing
-+scheme used for major driver lookup becomes untenable, because the
-+major tables (one each for character and block devices) would need to
-+be 64 k entries long (512 kBytes on x86, 1 MByte for 64 bit
-+systems). So we would have to use a scheme like that used for
-+miscellaneous character devices, which means the search time goes up
-+linearly with the average number of major device drivers on your
-+system. Not all "devices" are hardware, some are higher-level drivers
-+like KGI, so you can get more "devices" without adding hardware
-+You can improve this by creating an ordered (balanced:-)
-+binary tree, in which case your search time becomes log(N).
-+Alternatively, you can use hashing to speed up the search.
-+But why do that search at all if you don't have to? Once again, it
-+seems pointless.
-+
-+Note that devfs doesn't use the major&minor system. For devfs
-+entries, the connection is done when you lookup the /dev entry. When
-+devfs_register() is called, an internal table is appended which has
-+the entry name and the file_operations. If the dentry cache doesn't
-+have the /dev entry already, this internal table is scanned to get the
-+file_operations, and an inode is created. If the dentry cache already
-+has the entry, there is *no lookup time* (other than the dentry scan
-+itself, but we can't avoid that anyway, and besides Linux dentries
-+cream other OS's which don't have them:-). Furthermore, the number of
-+node entries in a devfs is only the number of available device
-+entries, not the number of *conceivable* entries. Even if you remove
-+unnecessary entries in a disc-based /dev, the number of conceivable
-+entries remains the same: you just limit yourself in order to save
-+space.
-+
-+Devfs provides a fast connection between a VFS node and the device
-+driver, in a scalable way.
-+
-+/dev as a system administration tool
-+
-+Right now /dev contains a list of conceivable devices, most of which I
-+don't have. Devfs only shows those devices available on my
-+system. This means that listing /dev is a handy way of checking what
-+devices are available.
-+
-+Major&minor size
-+
-+Existing major and minor numbers are limited to 8 bits each. This is
-+now a limiting factor for some drivers, particularly the SCSI disc
-+driver, which consumes a single major number. Only 16 discs are
-+supported, and each disc may have only 15 partitions. Maybe this isn't
-+a problem for you, but some of us are building huge Linux systems with
-+disc arrays. With devfs an arbitrary pointer can be associated with
-+each device entry, which can be used to give an effective 32 bit
-+device identifier (i.e. that's like having a 32 bit minor
-+number). Since this is private to the kernel, there are no C library
-+compatibility issues which you would have with increasing major and
-+minor number sizes. See the section on "Allocation of Device Numbers"
-+for details on maintaining compatibility with userspace.
-+
-+Solving this requires a kernel change.
-+
-+Since writing this, the kernel has been modified so that the SCSI disc
-+driver has more major numbers allocated to it and now supports up to
-+128 discs. Since these major numbers are non-contiguous (a result of
-+unplanned expansion), the implementation is a little more cumbersome
-+than originally.
-+
-+Just like the changes to IPv4 to fix impending limitations in the
-+address space, people find ways around the limitations. In the long
-+run, however, solutions like IPv6 or devfs can't be put off forever.
-+
-+Read-only root filesystem
-+
-+Having your device nodes on the root filesystem means that you can't
-+operate properly with a read-only root filesystem. This is because you
-+want to change ownerships and protections of tty devices. Existing
-+practice prevents you using a CD-ROM as your root filesystem for a
-+*real* system. Sure, you can boot off a CD-ROM, but you can't change
-+tty ownerships, so it's only good for installing.
-+
-+Also, you can't use a shared NFS root filesystem for a cluster of
-+discless Linux machines (having tty ownerships changed on a common
-+/dev is not good). Nor can you embed your root filesystem in a
-+ROM-FS.
-+
-+You can get around this by creating a RAMDISC at boot time, making
-+an ext2 filesystem in it, mounting it somewhere and copying the
-+contents of /dev into it, then unmounting it and mounting it over
-+/dev.
-+
-+A devfs is a cleaner way of solving this.
-+
-+Non-Unix root filesystem
-+
-+Non-Unix filesystems (such as NTFS) can't be used for a root
-+filesystem because they variously don't support character and block
-+special files or symbolic links. You can't have a separate disc-based
-+or RAMDISC-based filesystem mounted on /dev because you need device
-+nodes before you can mount these. Devfs can be mounted without any
-+device nodes. Devlinks won't work because symlinks aren't supported.
-+An alternative solution is to use initrd to mount a RAMDISC initial
-+root filesystem (which is populated with a minimal set of device
-+nodes), and then construct a new /dev in another RAMDISC, and finally
-+switch to your non-Unix root filesystem. This requires clever boot
-+scripts and a fragile and conceptually complex boot procedure.
-+
-+Devfs solves this in a robust and conceptually simple way.
-+
-+PTY security
-+
-+Current pseudo-tty (pty) devices are owned by root and read-writable
-+by everyone. The user of a pty-pair cannot change
-+ownership/protections without being suid-root.
-+
-+This could be solved with a secure user-space daemon which runs as
-+root and does the actual creation of pty-pairs. Such a daemon would
-+require modification to *every* programme that wants to use this new
-+mechanism. It also slows down creation of pty-pairs.
-+
-+An alternative is to create a new open_pty() syscall which does much
-+the same thing as the user-space daemon. Once again, this requires
-+modifications to pty-handling programmes.
-+
-+The devfs solution allows a device driver to "tag" certain device
-+files so that when an unopened device is opened, the ownerships are
-+changed to the current euid and egid of the opening process, and the
-+protections are changed to the default registered by the driver. When
-+the device is closed ownership is set back to root and protections are
-+set back to read-write for everybody. No programme need be changed.
-+The devpts filesystem provides this auto-ownership feature for Unix98
-+ptys. It doesn't support old-style pty devices, nor does it have all
-+the other features of devfs.
-+
-+Intelligent device management
-+
-+Devfs implements a simple yet powerful protocol for communication with
-+a device management daemon (devfsd) which runs in user space. It is
-+possible to send a message (either synchronously or asynchronously) to
-+devfsd on any event, such as registration/unregistration of device
-+entries, opening and closing devices, looking up inodes, scanning
-+directories and more. This has many possibilities. Some of these are
-+already implemented. See:
-+
-+
-+http://www.atnf.csiro.au/~rgooch/linux/
-+
-+Device entry registration events can be used by devfsd to change
-+permissions of newly-created device nodes. This is one mechanism to
-+control device permissions.
-+
-+Device entry registration/unregistration events can be used to run
-+programmes or scripts. This can be used to provide automatic mounting
-+of filesystems when a new block device media is inserted into the
-+drive.
-+
-+Asynchronous device open and close events can be used to implement
-+clever permissions management. For example, the default permissions on
-+/dev/dsp do not allow everybody to read from the device. This is
-+sensible, as you don't want some remote user recording what you say at
-+your console. However, the console user is also prevented from
-+recording. This behaviour is not desirable. With asynchronous device
-+open and close events, you can have devfsd run a programme or script
-+when console devices are opened to change the ownerships for *other*
-+device nodes (such as /dev/dsp). On closure, you can run a different
-+script to restore permissions. An advantage of this scheme over
-+modifying the C library tty handling is that this works even if your
-+programme crashes (how many times have you seen the utmp database with
-+lingering entries for non-existent logins?).
-+
-+Synchronous device open events can be used to perform intelligent
-+device access protections. Before the device driver open() method is
-+called, the daemon must first validate the open attempt, by running an
-+external programme or script. This is far more flexible than access
-+control lists, as access can be determined on the basis of other
-+system conditions instead of just the UID and GID.
-+
-+Inode lookup events can be used to authenticate module autoload
-+requests. Instead of using kmod directly, the event is sent to
-+devfsd which can implement an arbitrary authentication before loading
-+the module itself.
-+
-+Inode lookup events can also be used to construct arbitrary
-+namespaces, without having to resort to populating devfs with symlinks
-+to devices that don't exist.
-+
-+Speculative Device Scanning
-+
-+Consider an application (like cdparanoia) that wants to find all
-+CD-ROM devices on the system (SCSI, IDE and other types), whether or
-+not their respective modules are loaded. The application must
-+speculatively open certain device nodes (such as /dev/sr0 for the SCSI
-+CD-ROMs) in order to make sure the module is loaded. This requires
-+that all Linux distributions follow the standard device naming scheme
-+(last time I looked RedHat did things differently). Devfs solves the
-+naming problem.
-+
-+The same application also wants to see which devices are actually
-+available on the system. With the existing system it needs to read the
-+/dev directory and speculatively open each /dev/sr* device to
-+determine if the device exists or not. With a large /dev this is an
-+inefficient operation, especially if there are many /dev/sr* nodes. A
-+solution like scsidev could reduce the number of /dev/sr* entries (but
-+of course that also requires all that inefficient directory scanning).
-+
-+With devfs, the application can open the /dev/sr directory
-+(which triggers the module autoloading if required), and proceed to
-+read /dev/sr. Since only the available devices will have
-+entries, there are no inefficencies in directory scanning or device
-+openings.
-+
-+-----------------------------------------------------------------------------
-+
-+Who else does it?
-+
-+FreeBSD has a devfs implementation. Solaris and AIX each have a
-+pseudo-devfs (something akin to scsidev but for all devices, with some
-+unspecified kernel support). BeOS, Plan9 and QNX also have it. SGI's
-+IRIX 6.4 and above also have a device filesystem.
-+
-+While we shouldn't just automatically do something because others do
-+it, we should not ignore the work of others either. FreeBSD has a lot
-+of competent people working on it, so their opinion should not be
-+blithely ignored.
-+
-+-----------------------------------------------------------------------------
-+
-+
-+How it works
-+
-+Registering device entries
-+
-+For every entry (device node) in a devfs-based /dev a driver must call
-+devfs_register(). This adds the name of the device entry, the
-+file_operations structure pointer and a few other things to an
-+internal table. Device entries may be added and removed at any
-+time. When a device entry is registered, it automagically appears in
-+any mounted devfs'.
-+
-+Inode lookup
-+
-+When a lookup operation on an entry is performed and if there is no
-+driver information for that entry devfs will attempt to call
-+devfsd. If still no driver information can be found then a negative
-+dentry is yielded and the next stage operation will be called by the
-+VFS (such as create() or mknod() inode methods). If driver information
-+can be found, an inode is created (if one does not exist already) and
-+all is well.
-+
-+Manually creating device nodes
-+
-+The mknod() method allows you to create an ordinary named pipe in the
-+devfs, or you can create a character or block special inode if one
-+does not already exist. You may wish to create a character or block
-+special inode so that you can set permissions and ownership. Later, if
-+a device driver registers an entry with the same name, the
-+permissions, ownership and times are retained. This is how you can set
-+the protections on a device even before the driver is loaded. Once you
-+create an inode it appears in the directory listing.
-+
-+Unregistering device entries
-+
-+A device driver calls devfs_unregister() to unregister an entry.
-+
-+Chroot() gaols
-+
-+2.2.x kernels
-+
-+The semantics of inode creation are different when devfs is mounted
-+with the "explicit" option. Now, when a device entry is registered, it
-+will not appear until you use mknod() to create the device. It doesn't
-+matter if you mknod() before or after the device is registered with
-+devfs_register(). The purpose of this behaviour is to support
-+chroot(2) gaols, where you want to mount a minimal devfs inside the
-+gaol. Only the devices you specifically want to be available (through
-+your mknod() setup) will be accessible.
-+
-+2.4.x kernels
-+
-+As of kernel 2.3.99, the VFS has had the ability to rebind parts of
-+the global filesystem namespace into another part of the namespace.
-+This now works even at the leaf-node level, which means that
-+individual files and device nodes may be bound into other parts of the
-+namespace. This is like making links, but better, because it works
-+across filesystems (unlike hard links) and works through chroot()
-+gaols (unlike symbolic links).
-+
-+Because of these improvements to the VFS, the multi-mount capability
-+in devfs is no longer needed. The administrator may create a minimal
-+device tree inside a chroot(2) gaol by using VFS bindings. As this
-+provides most of the features of the devfs multi-mount capability, I
-+removed the multi-mount support code (after issuing an RFC). This
-+yielded code size reductions and simplifications.
-+
-+If you want to construct a minimal chroot() gaol, the following
-+command should suffice:
-+
-+mount --bind /dev/null /gaol/dev/null
-+
-+
-+Repeat for other device nodes you want to expose. Simple!
-+
-+-----------------------------------------------------------------------------
-+
-+
-+Operational issues
-+
-+
-+Instructions for the impatient
-+
-+Nobody likes reading documentation. People just want to get in there
-+and play. So this section tells you quickly the steps you need to take
-+to run with devfs mounted over /dev. Skip these steps and you will end
-+up with a nearly unbootable system. Subsequent sections describe the
-+issues in more detail, and discuss non-essential configuration
-+options.
-+
-+Devfsd
-+OK, if you're reading this, I assume you want to play with
-+devfs. First you should ensure that /usr/src/linux contains a
-+recent kernel source tree. Then you need to compile devfsd, the device
-+management daemon, available at
-+
-+http://www.atnf.csiro.au/~rgooch/linux/.
-+Because the kernel has a naming scheme
-+which is quite different from the old naming scheme, you need to
-+install devfsd so that software and configuration files that use the
-+old naming scheme will not break.
-+
-+Compile and install devfsd. You will be provided with a default
-+configuration file /etc/devfsd.conf which will provide
-+compatibility symlinks for the old naming scheme. Don't change this
-+config file unless you know what you're doing. Even if you think you
-+do know what you're doing, don't change it until you've followed all
-+the steps below and booted a devfs-enabled system and verified that it
-+works.
-+
-+Now edit your main system boot script so that devfsd is started at the
-+very beginning (before any filesystem
-+checks). /etc/rc.d/rc.sysinit is often the main boot script
-+on systems with SysV-style boot scripts. On systems with BSD-style
-+boot scripts it is often /etc/rc. Also check
-+/sbin/rc.
-+
-+NOTE that the line you put into the boot
-+script should be exactly:
-+
-+/sbin/devfsd /dev
-+
-+DO NOT use some special daemon-launching
-+programme, otherwise the boot script may not wait for devfsd to finish
-+initialising.
-+
-+System Libraries
-+There may still be some problems because of broken software making
-+assumptions about device names. In particular, some software does not
-+handle devices which are symbolic links. If you are running a libc 5
-+based system, install libc 5.4.44 (if you have libc 5.4.46, go back to
-+libc 5.4.44, which is actually correct). If you are running a glibc
-+based system, make sure you have glibc 2.1.3 or later.
-+
-+/etc/securetty
-+PAM (Pluggable Authentication Modules) is supposed to be a flexible
-+mechanism for providing better user authentication and access to
-+services. Unfortunately, it's also fragile, complex and undocumented
-+(check out RedHat 6.1, and probably other distributions as well). PAM
-+has problems with symbolic links. Append the following lines to your
-+/etc/securetty file:
-+
-+vc/1
-+vc/2
-+vc/3
-+vc/4
-+vc/5
-+vc/6
-+vc/7
-+vc/8
-+
-+This will not weaken security. If you have a version of util-linux
-+earlier than 2.10.h, please upgrade to 2.10.h or later. If you
-+absolutely cannot upgrade, then also append the following lines to
-+your /etc/securetty file:
-+
-+1
-+2
-+3
-+4
-+5
-+6
-+7
-+8
-+
-+This may potentially weaken security by allowing root logins over the
-+network (a password is still required, though). However, since there
-+are problems with dealing with symlinks, I'm suspicious of the level
-+of security offered in any case.
-+
-+XFree86
-+While not essential, it's probably a good idea to upgrade to XFree86
-+4.0, as patches went in to make it more devfs-friendly. If you don't,
-+you'll probably need to apply the following patch to
-+/etc/security/console.perms so that ordinary users can run
-+startx. Note that not all distributions have this file (e.g. Debian),
-+so if it's not present, don't worry about it.
-+
-+--- /etc/security/console.perms.orig    Sat Apr 17 16:26:47 1999 
-++++ /etc/security/console.perms Fri Feb 25 23:53:55 2000 
-+@@ -14,7 +14,7 @@ 
-+ # man 5 console.perms 
-+
-+ # file classes -- these are regular expressions 
-+-<console>=tty[0-9][0-9]* :[0-9]\.[0-9] :[0-9] 
-++<console>=tty[0-9][0-9]* vc/[0-9][0-9]* :[0-9]\.[0-9] :[0-9] 
-+
-+ # device classes -- these are shell-style globs 
-+ <floppy>=/dev/fd[0-1]* 
-+
-+If the patch does not apply, then change the line:
-+
-+<console>=tty[0-9][0-9]* :[0-9]\.[0-9] :[0-9]
-+
-+with:
-+
-+<console>=tty[0-9][0-9]* vc/[0-9][0-9]* :[0-9]\.[0-9] :[0-9]
-+
-+
-+Disable devpts
-+I've had a report of devpts mounted on /dev/pts not working
-+correctly. Since devfs will also manage /dev/pts, there is no
-+need to mount devpts as well. You should either edit your
-+/etc/fstab so devpts is not mounted, or disable devpts from
-+your kernel configuration.
-+
-+Unsupported drivers
-+Not all drivers have devfs support. If you depend on one of these
-+drivers, you will need to create a script or tarfile that you can use
-+at boot time to create device nodes as appropriate. There is a
-+section which describes this. Another
-+section lists the drivers which have
-+devfs support.
-+
-+/dev/mouse
-+
-+Many disributions configure /dev/mouse to be the mouse device
-+for XFree86 and GPM. I actually think this is a bad idea, because it
-+adds another level of indirection. When looking at a config file, if
-+you see /dev/mouse you're left wondering which mouse
-+is being referred to. Hence I recommend putting the actual mouse
-+device (for example /dev/psaux) into your
-+/etc/X11/XF86Config file (and similarly for the GPM
-+configuration file).
-+
-+Alternatively, use the same technique used for unsupported drivers
-+described above.
-+
-+The Kernel
-+Finally, you need to make sure devfs is compiled into your kernel. Set
-+CONFIG_EXPERIMENTAL=y, CONFIG_DEVFS_FS=y and CONFIG_DEVFS_MOUNT=y by
-+using favourite configuration tool (i.e. make config or
-+make xconfig) and then make clean and then recompile your kernel and 
-+modules. At boot, devfs will be mounted onto /dev.
-+
-+If you encounter problems booting (for example if you forgot a
-+configuration step), you can pass devfs=nomount at the kernel
-+boot command line. This will prevent the kernel from mounting devfs at
-+boot time onto /dev.
-+
-+In general, a kernel built with CONFIG_DEVFS_FS=y but without mounting
-+devfs onto /dev is completely safe, and requires no
-+configuration changes. One exception to take note of is when
-+LABEL= directives are used in /etc/fstab. In this
-+case you will be unable to boot properly. This is because the
-+mount(8) programme uses /proc/partitions as part of
-+the volume label search process, and the device names it finds are not
-+available, because setting CONFIG_DEVFS_FS=y changes the names in
-+/proc/partitions, irrespective of whether devfs is mounted.
-+
-+Now you've finished all the steps required. You're now ready to boot
-+your shiny new kernel. Enjoy.
-+
-+Changing the configuration
-+
-+OK, you've now booted a devfs-enabled system, and everything works.
-+Now you may feel like changing the configuration (common targets are
-+/etc/fstab and /etc/devfsd.conf). Since you have a
-+system that works, if you make any changes and it doesn't work, you
-+now know that you only have to restore your configuration files to the
-+default and it will work again.
-+
-+
-+Permissions persistence across reboots
-+
-+If you don't use mknod(2) to create a device file, nor use chmod(2) or
-+chown(2) to change the ownerships/permissions, the inode ctime will
-+remain at 0 (the epoch, 12 am, 1-JAN-1970, GMT). Anything with a ctime
-+later than this has had it's ownership/permissions changed. Hence, a
-+simple script or programme may be used to tar up all changed inodes,
-+prior to shutdown. Although effective, many consider this approach a
-+kludge.
-+
-+A much better approach is to use devfsd to save and restore
-+permissions. It may be configured to record changes in permissions and
-+will save them in a database (in fact a directory tree), and restore
-+these upon boot. This is an efficient method and results in immediate
-+saving of current permissions (unlike the tar approach, which saves
-+permissions at some unspecified future time).
-+
-+The default configuration file supplied with devfsd has config entries
-+which you may uncomment to enable persistence management.
-+
-+If you decide to use the tar approach anyway, be aware that tar will
-+first unlink(2) an inode before creating a new device node. The
-+unlink(2) has the effect of breaking the connection between a devfs
-+entry and the device driver. If you use the "devfs=only" boot option,
-+you lose access to the device driver, requiring you to reload the
-+module. I consider this a bug in tar (there is no real need to
-+unlink(2) the inode first).
-+
-+Alternatively, you can use devfsd to provide more sophisticated
-+management of device permissions. You can use devfsd to store
-+permissions for whole groups of devices with a single configuration
-+entry, rather than the conventional single entry per device entry.
-+
-+Permissions database stored in mounted-over /dev
-+
-+If you wish to save and restore your device permissions into the
-+disc-based /dev while still mounting devfs onto /dev
-+you may do so. This requires a 2.4.x kernel (in fact, 2.3.99 or
-+later), which has the VFS binding facility. You need to do the
-+following to set this up:
-+
-+
-+
-+make sure the kernel does not mount devfs at boot time
-+
-+
-+make sure you have a correct /dev/console entry in your
-+root file-system (where your disc-based /dev lives)
-+
-+create the /dev-state directory
-+
-+
-+add the following lines near the very beginning of your boot
-+scripts:
-+
-+mount --bind /dev /dev-state
-+mount -t devfs none /dev
-+devfsd /dev
-+
-+
-+
-+
-+add the following lines to your /etc/devfsd.conf file:
-+
-+REGISTER	^pt[sy]		IGNORE
-+CREATE		^pt[sy]		IGNORE
-+CHANGE		^pt[sy]		IGNORE
-+DELETE		^pt[sy]		IGNORE
-+REGISTER	.*		COPY	/dev-state/$devname $devpath
-+CREATE		.*		COPY	$devpath /dev-state/$devname
-+CHANGE		.*		COPY	$devpath /dev-state/$devname
-+DELETE		.*		CFUNCTION GLOBAL unlink /dev-state/$devname
-+RESTORE		/dev-state
-+
-+Note that the sample devfsd.conf file contains these lines,
-+as well as other sample configurations you may find useful. See the
-+devfsd distribution
-+
-+
-+reboot.
-+
-+
-+
-+
-+Permissions database stored in normal directory
-+
-+If you are using an older kernel which doesn't support VFS binding,
-+then you won't be able to have the permissions database in a
-+mounted-over /dev. However, you can still use a regular
-+directory to store the database. The sample /etc/devfsd.conf
-+file above may still be used. You will need to create the
-+/dev-state directory prior to installing devfsd. If you have
-+old permissions in /dev, then just copy (or move) the device
-+nodes over to the new directory.
-+
-+Which method is better?
-+
-+The best method is to have the permissions database stored in the
-+mounted-over /dev. This is because you will not need to copy
-+device nodes over to /dev-state, and because it allows you to
-+switch between devfs and non-devfs kernels, without requiring you to
-+copy permissions between /dev-state (for devfs) and
-+/dev (for non-devfs).
-+
-+
-+Dealing with drivers without devfs support
-+
-+Currently, not all device drivers in the kernel have been modified to
-+use devfs. Device drivers which do not yet have devfs support will not
-+automagically appear in devfs. The simplest way to create device nodes
-+for these drivers is to unpack a tarfile containing the required
-+device nodes. You can do this in your boot scripts. All your drivers
-+will now work as before.
-+
-+Hopefully for most people devfs will have enough support so that they
-+can mount devfs directly over /dev without losing most functionality
-+(i.e. losing access to various devices). As of 22-JAN-1998 (devfs
-+patch version 10) I am now running this way. All the devices I have
-+are available in devfs, so I don't lose anything.
-+
-+WARNING: if your configuration requires the old-style device names
-+(i.e. /dev/hda1 or /dev/sda1), you must install devfsd and configure
-+it to maintain compatibility entries. It is almost certain that you
-+will require this. Note that the kernel creates a compatibility entry
-+for the root device, so you don't need initrd.
-+
-+Note that you no longer need to mount devpts if you use Unix98 PTYs,
-+as devfs can manage /dev/pts itself. This saves you some RAM, as you
-+don't need to compile and install devpts. Note that some versions of
-+glibc have a bug with Unix98 pty handling on devfs systems. Contact
-+the glibc maintainers for a fix. Glibc 2.1.3 has the fix.
-+
-+Note also that apart from editing /etc/fstab, other things will need
-+to be changed if you *don't* install devfsd. Some software (like the X
-+server) hard-wire device names in their source. It really is much
-+easier to install devfsd so that compatibility entries are created.
-+You can then slowly migrate your system to using the new device names
-+(for example, by starting with /etc/fstab), and then limiting the
-+compatibility entries that devfsd creates.
-+
-+IF YOU CONFIGURE TO MOUNT DEVFS AT BOOT, MAKE SURE YOU INSTALL DEVFSD
-+BEFORE YOU BOOT A DEVFS-ENABLED KERNEL!
-+
-+Now that devfs has gone into the 2.3.46 kernel, I'm getting a lot of
-+reports back. Many of these are because people are trying to run
-+without devfsd, and hence some things break. Please just run devfsd if
-+things break. I want to concentrate on real bugs rather than
-+misconfiguration problems at the moment. If people are willing to fix
-+bugs/false assumptions in other code (i.e. glibc, X server) and submit
-+that to the respective maintainers, that would be great.
-+
-+
-+All the way with Devfs
-+
-+The devfs kernel patch creates a rationalised device tree. As stated
-+above, if you want to keep using the old /dev naming scheme,
-+you just need to configure devfsd appopriately (see the man
-+page). People who prefer the old names can ignore this section. For
-+those of us who like the rationalised names and an uncluttered
-+/dev, read on.
-+
-+If you don't run devfsd, or don't enable compatibility entry
-+management, then you will have to configure your system to use the new
-+names. For example, you will then need to edit your
-+/etc/fstab to use the new disc naming scheme. If you want to
-+be able to boot non-devfs kernels, you will need compatibility
-+symlinks in the underlying disc-based /dev pointing back to
-+the old-style names for when you boot a kernel without devfs.
-+
-+You can selectively decide which devices you want compatibility
-+entries for. For example, you may only want compatibility entries for
-+BSD pseudo-terminal devices (otherwise you'll have to patch you C
-+library or use Unix98 ptys instead). It's just a matter of putting in
-+the correct regular expression into /dev/devfsd.conf.
-+
-+There are other choices of naming schemes that you may prefer. For
-+example, I don't use the kernel-supplied
-+names, because they are too verbose. A common misconception is
-+that the kernel-supplied names are meant to be used directly in
-+configuration files. This is not the case. They are designed to
-+reflect the layout of the devices attached and to provide easy
-+classification.
-+
-+If you like the kernel-supplied names, that's fine. If you don't then
-+you should be using devfsd to construct a namespace more to your
-+liking. Devfsd has built-in code to construct a
-+namespace that is both logical and easy to
-+manage. In essence, it creates a convenient abbreviation of the
-+kernel-supplied namespace.
-+
-+You are of course free to build your own namespace. Devfsd has all the
-+infrastructure required to make this easy for you. All you need do is
-+write a script. You can even write some C code and devfsd can load the
-+shared object as a callable extension.
-+
-+
-+Other Issues
-+
-+The init programme
-+Another thing to take note of is whether your init programme
-+creates a Unix socket /dev/telinit. Some versions of init
-+create /dev/telinit so that the telinit programme can
-+communicate with the init process. If you have such a system you need
-+to make sure that devfs is mounted over /dev *before* init
-+starts. In other words, you can't leave the mounting of devfs to
-+/etc/rc, since this is executed after init. Other
-+versions of init require a named pipe /dev/initctl
-+which must exist *before* init starts. Once again, you need to
-+mount devfs and then create the named pipe *before* init
-+starts.
-+
-+The default behaviour now is not to mount devfs onto /dev at
-+boot time for 2.3.x and later kernels. You can correct this with the
-+"devfs=mount" boot option. This solves any problems with init,
-+and also prevents the dreaded:
-+
-+Cannot open initial console
-+
-+message. For 2.2.x kernels where you need to apply the devfs patch,
-+the default is to mount.
-+
-+If you have automatic mounting of devfs onto /dev then you
-+may need to create /dev/initctl in your boot scripts. The
-+following lines should suffice:
-+
-+mknod /dev/initctl p
-+kill -SIGUSR1 1       # tell init that /dev/initctl now exists
-+
-+Alternatively, if you don't want the kernel to mount devfs onto
-+/dev then you could use the following procedure is a
-+guideline for how to get around /dev/initctl problems:
-+
-+# cd /sbin
-+# mv init init.real
-+# cat > init
-+#! /bin/sh
-+mount -n -t devfs none /dev
-+mknod /dev/initctl p
-+exec /sbin/init.real $*
-+[control-D]
-+# chmod a+x init
-+
-+Note that newer versions of init create /dev/initctl
-+automatically, so you don't have to worry about this.
-+
-+Module autoloading
-+You will need to configure devfsd to enable module
-+autoloading. The following lines should be placed in your
-+/etc/devfsd.conf file:
-+
-+LOOKUP	.*		MODLOAD
-+
-+
-+As of devfsd-v1.3.10, a generic /etc/modules.devfs
-+configuration file is installed, which is used by the MODLOAD
-+action. This should be sufficient for most configurations. If you
-+require further configuration, edit your /etc/modules.conf
-+file. The way module autoloading work with devfs is:
-+
-+
-+a process attempts to lookup a device node (e.g. /dev/fred)
-+
-+
-+if that device node does not exist, the full pathname is passed to
-+devfsd as a string
-+
-+
-+devfsd will pass the string to the modprobe programme (provided the
-+configuration line shown above is present), and specifies that
-+/etc/modules.devfs is the configuration file
-+
-+
-+/etc/modules.devfs includes /etc/modules.conf to
-+access local configurations
-+
-+modprobe will search it's configuration files, looking for an alias
-+that translates the pathname into a module name
-+
-+
-+the translated pathname is then used to load the module.
-+
-+
-+If you wanted a lookup of /dev/fred to load the
-+mymod module, you would require the following configuration
-+line in /etc/modules.conf:
-+
-+alias    /dev/fred    mymod
-+
-+The /etc/modules.devfs configuration file provides many such
-+aliases for standard device names. If you look closely at this file,
-+you will note that some modules require multiple alias configuration
-+lines. This is required to support module autoloading for old and new
-+device names.
-+
-+Mounting root off a devfs device
-+If you wish to mount root off a devfs device when you pass the
-+"devfs=only" boot option, then you need to pass in the
-+"root=<device>" option to the kernel when booting. If you use
-+LILO, then you must have this in lilo.conf:
-+
-+append = "root=<device>"
-+
-+Surprised? Yep, so was I. It turns out if you have (as most people
-+do):
-+
-+root = <device>
-+
-+
-+then LILO will determine the device number of <device> and will
-+write that device number into a special place in the kernel image
-+before starting the kernel, and the kernel will use that device number
-+to mount the root filesystem. So, using the "append" variety ensures
-+that LILO passes the root filesystem device as a string, which devfs
-+can then use.
-+
-+Note that this isn't an issue if you don't pass "devfs=only".
-+
-+TTY issues
-+The ttyname(3) function in some versions of the C library makes
-+false assumptions about device entries which are symbolic links.  The
-+tty(1) programme is one that depends on this function.  I've
-+written a patch to libc 5.4.43 which fixes this. This has been
-+included in libc 5.4.44 and a similar fix is in glibc 2.1.3.
-+
-+
-+Kernel Naming Scheme
-+
-+The kernel provides a default naming scheme. This scheme is designed
-+to make it easy to search for specific devices or device types, and to
-+view the available devices. Some device types (such as hard discs),
-+have a directory of entries, making it easy to see what devices of
-+that class are available. Often, the entries are symbolic links into a
-+directory tree that reflects the topology of available devices. The
-+topological tree is useful for finding how your devices are arranged.
-+
-+Below is a list of the naming schemes for the most common drivers. A
-+list of reserved device names is
-+available for reference. Please send email to
-+rgooch@atnf.csiro.au to obtain an allocation. Please be
-+patient (the maintainer is busy). An alternative name may be allocated
-+instead of the requested name, at the discretion of the maintainer.
-+
-+Disc Devices
-+
-+All discs, whether SCSI, IDE or whatever, are placed under the
-+/dev/discs hierarchy:
-+
-+	/dev/discs/disc0	first disc
-+	/dev/discs/disc1	second disc
-+
-+
-+Each of these entries is a symbolic link to the directory for that
-+device. The device directory contains:
-+
-+	disc	for the whole disc
-+	part*	for individual partitions
-+
-+
-+CD-ROM Devices
-+
-+All CD-ROMs, whether SCSI, IDE or whatever, are placed under the
-+/dev/cdroms hierarchy:
-+
-+	/dev/cdroms/cdrom0	first CD-ROM
-+	/dev/cdroms/cdrom1	second CD-ROM
-+
-+
-+Each of these entries is a symbolic link to the real device entry for
-+that device.
-+
-+Tape Devices
-+
-+All tapes, whether SCSI, IDE or whatever, are placed under the
-+/dev/tapes hierarchy:
-+
-+	/dev/tapes/tape0	first tape
-+	/dev/tapes/tape1	second tape
-+
-+
-+Each of these entries is a symbolic link to the directory for that
-+device. The device directory contains:
-+
-+	mt			for mode 0
-+	mtl			for mode 1
-+	mtm			for mode 2
-+	mta			for mode 3
-+	mtn			for mode 0, no rewind
-+	mtln			for mode 1, no rewind
-+	mtmn			for mode 2, no rewind
-+	mtan			for mode 3, no rewind
-+
-+
-+SCSI Devices
-+
-+To uniquely identify any SCSI device requires the following
-+information:
-+
-+  controller	(host adapter)
-+  bus		(SCSI channel)
-+  target	(SCSI ID)
-+  unit		(Logical Unit Number)
-+
-+
-+All SCSI devices are placed under /dev/scsi (assuming devfs
-+is mounted on /dev). Hence, a SCSI device with the following
-+parameters: c=1,b=2,t=3,u=4 would appear as:
-+
-+	/dev/scsi/host1/bus2/target3/lun4	device directory
-+
-+
-+Inside this directory, a number of device entries may be created,
-+depending on which SCSI device-type drivers were installed.
-+
-+See the section on the disc naming scheme to see what entries the SCSI
-+disc driver creates.
-+
-+See the section on the tape naming scheme to see what entries the SCSI
-+tape driver creates.
-+
-+The SCSI CD-ROM driver creates:
-+
-+	cd
-+
-+
-+The SCSI generic driver creates:
-+
-+	generic
-+
-+
-+IDE Devices
-+
-+To uniquely identify any IDE device requires the following
-+information:
-+
-+  controller
-+  bus		(aka. primary/secondary)
-+  target	(aka. master/slave)
-+  unit
-+
-+
-+All IDE devices are placed under /dev/ide, and uses a similar
-+naming scheme to the SCSI subsystem.
-+
-+XT Hard Discs
-+
-+All XT discs are placed under /dev/xd. The first XT disc has
-+the directory /dev/xd/disc0.
-+
-+TTY devices
-+
-+The tty devices now appear as:
-+
-+  New name                   Old-name                   Device Type
-+  --------                   --------                   -----------
-+  /dev/tts/{0,1,...}         /dev/ttyS{0,1,...}         Serial ports
-+  /dev/cua/{0,1,...}         /dev/cua{0,1,...}          Call out devices
-+  /dev/vc/0                  /dev/tty                   Current virtual console
-+  /dev/vc/{1,2,...}          /dev/tty{1...63}           Virtual consoles
-+  /dev/vcc/{0,1,...}         /dev/vcs{1...63}           Virtual consoles
-+  /dev/pty/m{0,1,...}        /dev/ptyp??                PTY masters
-+  /dev/pty/s{0,1,...}        /dev/ttyp??                PTY slaves
-+
-+
-+RAMDISCS
-+
-+The RAMDISCS are placed in their own directory, and are named thus:
-+
-+  /dev/rd/{0,1,2,...}
-+
-+
-+Meta Devices
-+
-+The meta devices are placed in their own directory, and are named
-+thus:
-+
-+  /dev/md/{0,1,2,...}
-+
-+
-+Floppy discs
-+
-+Floppy discs are placed in the /dev/floppy directory.
-+
-+Loop devices
-+
-+Loop devices are placed in the /dev/loop directory.
-+
-+Sound devices
-+
-+Sound devices are placed in the /dev/sound directory
-+(audio, sequencer, ...).
-+
-+
-+Devfsd Naming Scheme
-+
-+Devfsd provides a naming scheme which is a convenient abbreviation of
-+the kernel-supplied namespace. In some
-+cases, the kernel-supplied naming scheme is quite convenient, so
-+devfsd does not provide another naming scheme. The convenience names
-+that devfsd creates are in fact the same names as the original devfs
-+kernel patch created (before Linus mandated the Big Name
-+Change). These are referred to as "new compatibility entries".
-+
-+In order to configure devfsd to create these convenience names, the
-+following lines should be placed in your /etc/devfsd.conf:
-+
-+REGISTER	.*		MKNEWCOMPAT
-+UNREGISTER	.*		RMNEWCOMPAT
-+
-+This will cause devfsd to create (and destroy) symbolic links which
-+point to the kernel-supplied names.
-+
-+SCSI Hard Discs
-+
-+All SCSI discs are placed under /dev/sd (assuming devfs is
-+mounted on /dev). Hence, a SCSI disc with the following
-+parameters: c=1,b=2,t=3,u=4 would appear as:
-+
-+	/dev/sd/c1b2t3u4	for the whole disc
-+	/dev/sd/c1b2t3u4p5	for the 5th partition
-+	/dev/sd/c1b2t3u4p5s6	for the 6th slice in the 5th partition
-+
-+
-+SCSI Tapes
-+
-+All SCSI tapes are placed under /dev/st. A similar naming
-+scheme is used as for SCSI discs. A SCSI tape with the
-+parameters:c=1,b=2,t=3,u=4 would appear as:
-+
-+	/dev/st/c1b2t3u4m0	for mode 0
-+	/dev/st/c1b2t3u4m1	for mode 1
-+	/dev/st/c1b2t3u4m2	for mode 2
-+	/dev/st/c1b2t3u4m3	for mode 3
-+	/dev/st/c1b2t3u4m0n	for mode 0, no rewind
-+	/dev/st/c1b2t3u4m1n	for mode 1, no rewind
-+	/dev/st/c1b2t3u4m2n	for mode 2, no rewind
-+	/dev/st/c1b2t3u4m3n	for mode 3, no rewind
-+
-+
-+SCSI CD-ROMs
-+
-+All SCSI CD-ROMs are placed under /dev/sr. A similar naming
-+scheme is used as for SCSI discs. A SCSI CD-ROM with the
-+parameters:c=1,b=2,t=3,u=4 would appear as:
-+
-+	/dev/sr/c1b2t3u4
-+
-+
-+SCSI Generic Devices
-+
-+The generic (aka. raw) interface for all SCSI devices are placed under
-+/dev/sg. A similar naming scheme is used as for SCSI discs. A
-+SCSI generic device with the parameters:c=1,b=2,t=3,u=4 would appear
-+as:
-+
-+	/dev/sg/c1b2t3u4
-+
-+
-+IDE Hard Discs
-+
-+All IDE discs are placed under /dev/ide/hd, using a similar
-+convention to SCSI discs. The following mappings exist between the new
-+and the old names:
-+
-+	/dev/hda	/dev/ide/hd/c0b0t0u0
-+	/dev/hdb	/dev/ide/hd/c0b0t1u0
-+	/dev/hdc	/dev/ide/hd/c0b1t0u0
-+	/dev/hdd	/dev/ide/hd/c0b1t1u0
-+
-+
-+IDE Tapes
-+
-+A similar naming scheme is used as for IDE discs. The entries will
-+appear in the /dev/ide/mt directory.
-+
-+IDE CD-ROM
-+
-+A similar naming scheme is used as for IDE discs. The entries will
-+appear in the /dev/ide/cd directory.
-+
-+IDE Floppies
-+
-+A similar naming scheme is used as for IDE discs. The entries will
-+appear in the /dev/ide/fd directory.
-+
-+XT Hard Discs
-+
-+All XT discs are placed under /dev/xd. The first XT disc
-+would appear as /dev/xd/c0t0.
-+
-+
-+Old Compatibility Names
-+
-+The old compatibility names are the legacy device names, such as
-+/dev/hda, /dev/sda, /dev/rtc and so on.
-+Devfsd can be configured to create compatibility symlinks so that you
-+may continue to use the old names in your configuration files and so
-+that old applications will continue to function correctly.
-+
-+In order to configure devfsd to create these legacy names, the
-+following lines should be placed in your /etc/devfsd.conf:
-+
-+REGISTER	.*		MKOLDCOMPAT
-+UNREGISTER	.*		RMOLDCOMPAT
-+
-+This will cause devfsd to create (and destroy) symbolic links which
-+point to the kernel-supplied names.
-+
-+
-+-----------------------------------------------------------------------------
-+
-+
-+Device drivers currently ported
-+
-+- All miscellaneous character devices support devfs (this is done
-+  transparently through misc_register())
-+
-+- SCSI discs and generic hard discs
-+
-+- Character memory devices (null, zero, full and so on)
-+  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
-+
-+- Loop devices (/dev/loop?)
-+ 
-+- TTY devices (console, serial ports, terminals and pseudo-terminals)
-+  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
-+
-+- SCSI tapes (/dev/scsi and /dev/tapes)
-+
-+- SCSI CD-ROMs (/dev/scsi and /dev/cdroms)
-+
-+- SCSI generic devices (/dev/scsi)
-+
-+- RAMDISCS (/dev/ram?)
-+
-+- Meta Devices (/dev/md*)
-+
-+- Floppy discs (/dev/floppy)
-+
-+- Parallel port printers (/dev/printers)
-+
-+- Sound devices (/dev/sound)
-+  Thanks to Eric Dumas <dumas@linux.eu.org> and
-+  C. Scott Ananian <cananian@alumni.princeton.edu>
-+
-+- Joysticks (/dev/joysticks)
-+
-+- Sparc keyboard (/dev/kbd)
-+
-+- DSP56001 digital signal processor (/dev/dsp56k)
-+
-+- Apple Desktop Bus (/dev/adb)
-+
-+- Coda network file system (/dev/cfs*)
-+
-+- Virtual console capture devices (/dev/vcc)
-+  Thanks to Dennis Hou <smilax@mindmeld.yi.org>
-+
-+- Frame buffer devices (/dev/fb)
-+
-+- Video capture devices (/dev/v4l)
-+
-+
-+-----------------------------------------------------------------------------
-+
-+
-+Allocation of Device Numbers
-+
-+Devfs allows you to write a driver which doesn't need to allocate a
-+device number (major&minor numbers) for the internal operation of the
-+kernel. However, there are a number of userspace programmes that use
-+the device number as a unique handle for a device. An example is the
-+find programme, which uses device numbers to determine whether
-+an inode is on a different filesystem than another inode. The device
-+number used is the one for the block device which a filesystem is
-+using. To preserve compatibility with userspace programmes, block
-+devices using devfs need to have unique device numbers allocated to
-+them. Furthermore, POSIX specifies device numbers, so some kind of
-+device number needs to be presented to userspace.
-+
-+The simplest option (especially when porting drivers to devfs) is to
-+keep using the old major and minor numbers. Devfs will take whatever
-+values are given for major&minor and pass them onto userspace.
-+
-+This device number is a 16 bit number, so this leaves plenty of space
-+for large numbers of discs and partitions. This scheme can also be
-+used for character devices, in particular the tty devices, which are
-+currently limited to 256 pseudo-ttys (this limits the total number of
-+simultaneous xterms and remote logins).  Note that the device number
-+is limited to the range 36864-61439 (majors 144-239), in order to
-+avoid any possible conflicts with existing official allocations.
-+
-+Please note that using dynamically allocated block device numbers may
-+break the NFS daemons (both user and kernel mode), which expect dev_t
-+for a given device to be constant over the lifetime of remote mounts.
-+
-+A final note on this scheme: since it doesn't increase the size of
-+device numbers, there are no compatibility issues with userspace.
-+
-+-----------------------------------------------------------------------------
-+
-+
-+Questions and Answers
-+
-+
-+Making things work
-+Alternatives to devfs
-+What I don't like about devfs
-+How to report bugs
-+Strange kernel messages
-+Compilation problems with devfsd
-+
-+
-+
-+Making things work
-+
-+Here are some common questions and answers.
-+
-+
-+
-+Devfsd doesn't start
-+
-+Make sure you have compiled and installed devfsd
-+Make sure devfsd is being started from your boot
-+scripts
-+Make sure you have configured your kernel to enable devfs (see
-+below)
-+Make sure devfs is mounted (see below)
-+
-+
-+Devfsd is not managing all my permissions
-+
-+Make sure you are capturing the appropriate events. For example,
-+device entries created by the kernel generate REGISTER events,
-+but those created by devfsd generate CREATE events.
-+
-+
-+Devfsd is not capturing all REGISTER events
-+
-+See the previous entry: you may need to capture CREATE events.
-+
-+
-+X will not start
-+
-+Make sure you followed the steps 
-+outlined above.
-+
-+
-+Why don't my network devices appear in devfs?
-+
-+This is not a bug. Network devices have their own, completely separate
-+namespace. They are accessed via socket(2) and
-+setsockopt(2) calls, and thus require no device nodes. I have
-+raised the possibilty of moving network devices into the device
-+namespace, but have had no response.
-+
-+
-+How can I test if I have devfs compiled into my kernel?
-+
-+All filesystems built-in or currently loaded are listed in
-+/proc/filesystems. If you see a devfs entry, then
-+you know that devfs was compiled into your kernel. If you have
-+correctly configured and rebuilt your kernel, then devfs will be
-+built-in. If you think you've configured it in, but
-+/proc/filesystems doesn't show it, you've made a mistake.
-+Common mistakes include:
-+
-+Using a 2.2.x kernel without applying the devfs patch (if you
-+don't know how to patch your kernel, use 2.4.x instead, don't bother
-+asking me how to patch)
-+Forgetting to set CONFIG_EXPERIMENTAL=y
-+Forgetting to set CONFIG_DEVFS_FS=y
-+Forgetting to set CONFIG_DEVFS_MOUNT=y (if you want devfs
-+to be automatically mounted at boot)
-+Editing your .config manually, instead of using make
-+config or make xconfig
-+Forgetting to run make dep; make clean after changing the
-+configuration and before compiling
-+Forgetting to compile your kernel and modules
-+Forgetting to install your kernel
-+Forgetting to install your modules
-+
-+Please check twice that you've done all these steps before sending in
-+a bug report.
-+
-+
-+
-+How can I test if devfs is mounted on /dev?
-+
-+The device filesystem will always create an entry called
-+".devfsd", which is used to communicate with the daemon. Even
-+if the daemon is not running, this entry will exist. Testing for the
-+existence of this entry is the approved method of determining if devfs
-+is mounted or not. Note that the type of entry (i.e. regular file,
-+character device, named pipe, etc.) may change without notice. Only
-+the existence of the entry should be relied upon.
-+
-+
-+When I start devfsd, I see the error:
-+Error opening file: ".devfsd"   No such file or directory?
-+
-+This means that devfs is not mounted. Make sure you have devfs mounted.
-+
-+
-+How do I mount devfs?
-+
-+First make sure you have devfs compiled into your kernel (see
-+above). Then you will either need to:
-+
-+set CONFIG_DEVFS_MOUNT=y in your kernel config
-+pass devfs=mount to your boot loader
-+mount devfs manually in your boot scripts with:
-+mount -t none devfs /dev
-+
-+
-+
-+Mount by volume LABEL=<label> doesn't work with
-+devfs
-+
-+Most probably you are not mounting devfs onto /dev. What
-+happens is that if your kernel config has CONFIG_DEVFS_FS=y
-+then the contents of /proc/partitions will have the devfs
-+names (such as scsi/host0/bus0/target0/lun0/part1). The
-+contents of /proc/partitions are used by mount(8) when
-+mounting by volume label. If devfs is not mounted on /dev,
-+then mount(8) will fail to find devices. The solution is to
-+make sure that devfs is mounted on /dev. See above for how to
-+do that.
-+
-+
-+I have extra or incorrect entries in /dev
-+
-+You may have stale entries in your dev-state area. Check for a
-+RESTORE configuration line in your devfsd configuration
-+(typically /etc/devfsd.conf). If you have this line, check
-+the contents of the specified directory for stale entries. Remove
-+any entries which are incorrect, then reboot.
-+
-+
-+I get "Unable to open initial console" messages at boot
-+
-+This usually happens when you don't have devfs automounted onto
-+/dev at boot time, and there is no valid
-+/dev/console entry on your root file-system. Create a valid
-+/dev/console device node.
-+
-+
-+
-+
-+
-+Alternatives to devfs
-+
-+I've attempted to collate all the anti-devfs proposals and explain
-+their limitations. Under construction.
-+
-+
-+Why not just pass device create/remove events to a daemon?
-+
-+Here the suggestion is to develop an API in the kernel so that devices
-+can register create and remove events, and a daemon listens for those
-+events. The daemon would then populate/depopulate /dev (which
-+resides on disc).
-+
-+This has several limitations:
-+
-+
-+it only works for modules loaded and unloaded (or devices inserted
-+and removed) after the kernel has finished booting. Without a database
-+of events, there is no way the daemon could fully populate
-+/dev
-+
-+
-+if you add a database to this scheme, the question is then how to
-+present that database to user-space. If you make it a list of strings
-+with embedded event codes which are passed through a pipe to the
-+daemon, then this is only of use to the daemon. I would argue that the
-+natural way to present this data is via a filesystem (since many of
-+the events will be of a hierarchical nature), such as devfs.
-+Presenting the data as a filesystem makes it easy for the user to see
-+what is available and also makes it easy to write scripts to scan the
-+"database"
-+
-+
-+the tight binding between device nodes and drivers is no longer
-+possible (requiring the otherwise perfectly avoidable
-+table lookups)
-+
-+
-+you cannot catch inode lookup events on /dev which means
-+that module autoloading requires device nodes to be created. This is a
-+problem, particularly for drivers where only a few inodes are created
-+from a potentially large set
-+
-+
-+this technique can't be used when the root FS is mounted
-+read-only
-+
-+
-+
-+
-+Just implement a better scsidev
-+
-+This suggestion involves taking the scsidev programme and
-+extending it to scan for all devices, not just SCSI devices. The
-+scsidev programme works by scanning /proc/scsi
-+
-+Problems:
-+
-+
-+the kernel does not currently provide a list of all devices
-+available. Not all drivers register entries in /proc or
-+generate kernel messages
-+
-+
-+there is no uniform mechanism to register devices other than the
-+devfs API
-+
-+
-+implementing such an API is then the same as the
-+proposal above
-+
-+
-+
-+
-+Put /dev on a ramdisc
-+
-+This suggestion involves creating a ramdisc and populating it with
-+device nodes and then mounting it over /dev.
-+
-+Problems:
-+
-+
-+
-+this doesn't help when mounting the root filesystem, since you
-+still need a device node to do that
-+
-+
-+if you want to use this technique for the root device node as
-+well, you need to use initrd. This complicates the booting sequence
-+and makes it significantly harder to administer and configure. The
-+initrd is essentially opaque, robbing the system administrator of easy
-+configuration
-+
-+
-+insufficient information is available to correctly populate the
-+ramdisc. So we come back to the
-+proposal above to "solve" this
-+
-+
-+a ramdisc-based solution would take more kernel memory, since the
-+backing store would be (at best) normal VFS inodes and dentries, which
-+take 284 bytes and 112 bytes, respectively, for each entry. Compare
-+that to 72 bytes for devfs
-+
-+
-+
-+
-+Do nothing: there's no problem
-+
-+Sometimes people can be heard to claim that the existing scheme is
-+fine. This is what they're ignoring:
-+
-+
-+device number size (8 bits each for major and minor) is a real
-+limitation, and must be fixed somehow. Systems with large numbers of
-+SCSI devices, for example, will continue to consume the remaining
-+unallocated major numbers. USB will also need to push beyond the 8 bit
-+minor limitation
-+
-+
-+simply increasing the device number size is insufficient. Apart
-+from causing a lot of pain, it doesn't solve the management issues
-+of a /dev with thousands or more device nodes
-+
-+
-+ignoring the problem of a huge /dev will not make it go
-+away, and dismisses the legitimacy of a large number of people who
-+want a dynamic /dev
-+
-+
-+the standard response then becomes: "write a device management
-+daemon", which brings us back to the
-+proposal above
-+
-+
-+
-+
-+What I don't like about devfs
-+
-+Here are some common complaints about devfs, and some suggestions and
-+solutions that may make it more palatable for you. I can't please
-+everybody, but I do try :-)
-+
-+I hate the naming scheme
-+
-+First, remember that no naming scheme will please everybody. You hate
-+the scheme, others love it. Who's to say who's right and who's wrong?
-+Ultimately, the person who writes the code gets to choose, and what
-+exists now is a combination of the choices made by the
-+devfs author and the
-+kernel maintainer (Linus).
-+
-+However, not all is lost. If you want to create your own naming
-+scheme, it is a simple matter to write a standalone script, hack
-+devfsd, or write a script called by devfsd. You can create whatever
-+naming scheme you like.
-+
-+Further, if you want to remove all traces of the devfs naming scheme
-+from /dev, you can mount devfs elsewhere (say
-+/devfs) and populate /dev with links into
-+/devfs. This population can be automated using devfsd if you
-+wish.
-+
-+You can even use the VFS binding facility to make the links, rather
-+than using symbolic links. This way, you don't even have to see the
-+"destination" of these symbolic links.
-+
-+Devfs puts policy into the kernel
-+
-+There's already policy in the kernel. Device numbers are in fact
-+policy (why should the kernel dictate what device numbers I use?).
-+Face it, some policy has to be in the kernel. The real difference
-+between device names as policy and device numbers as policy is that
-+no one will use device numbers directly, because device
-+numbers are devoid of meaning to humans and are ugly. At least with
-+the devfs device names, (even though you can add your own naming
-+scheme) some people will use the devfs-supplied names directly. This
-+offends some people :-)
-+
-+Devfs is bloatware
-+
-+This is not even remotely true. As shown above,
-+both code and data size are quite modest.
-+
-+
-+How to report bugs
-+
-+If you have (or think you have) a bug with devfs, please follow the
-+steps below:
-+
-+
-+
-+make sure you have enabled debugging output when configuring your
-+kernel. You will need to set (at least) the following config options:
-+
-+CONFIG_DEVFS_DEBUG=y
-+CONFIG_DEBUG_KERNEL=y
-+CONFIG_DEBUG_SLAB=y
-+
-+
-+
-+please make sure you have the latest devfs patches applied. The
-+latest kernel version might not have the latest devfs patches applied
-+yet (Linus is very busy)
-+
-+
-+save a copy of your complete kernel logs (preferably by
-+using the dmesg programme) for later inclusion in your bug
-+report. You may need to use the -s switch to increase the
-+internal buffer size so you can capture all the boot messages.
-+Don't edit or trim the dmesg output
-+
-+
-+
-+
-+try booting with devfs=dall passed to the kernel boot
-+command line (read the documentation on your bootloader on how to do
-+this), and save the result to a file. This may be quite verbose, and
-+it may overflow the messages buffer, but try to get as much of it as
-+you can
-+
-+
-+send a copy of your devfsd configuration file(s)
-+
-+send the bug report to me first.
-+Don't expect that I will see it if you post it to the linux-kernel
-+mailing list. Include all the information listed above, plus
-+anything else that you think might be relevant. Put the string
-+devfs somewhere in the subject line, so my mail filters mark
-+it as urgent
-+
-+
-+
-+
-+Here is a general guide on how to ask questions in a way that greatly
-+improves your chances of getting a reply:
-+
-+http://www.tuxedo.org/~esr/faqs/smart-questions.html. If you have
-+a bug to report, you should also read
-+
-+http://www.chiark.greenend.org.uk/~sgtatham/bugs.html.
-+
-+
-+Strange kernel messages
-+
-+You may see devfs-related messages in your kernel logs. Below are some
-+messages and what they mean (and what you should do about them, if
-+anything).
-+
-+
-+
-+devfs_register(fred): could not append to parent, err: -17
-+
-+You need to check what the error code means, but usually 17 means
-+EEXIST. This means that a driver attempted to create an entry
-+fred in a directory, but there already was an entry with that
-+name. This is often caused by flawed boot scripts which untar a bunch
-+of inodes into /dev, as a way to restore permissions. This
-+message is harmless, as the device nodes will still
-+provide access to the driver (unless you use the devfs=only
-+boot option, which is only for dedicated souls:-). If you want to get
-+rid of these annoying messages, upgrade to devfsd-v1.3.20 and use the
-+recommended RESTORE directive to restore permissions.
-+
-+
-+devfs_mk_dir(bill): using old entry in dir: c1808724 ""
-+
-+This is similar to the message above, except that a driver attempted
-+to create a directory named bill, and the parent directory
-+has an entry with the same name. In this case, to ensure that drivers
-+continue to work properly, the old entry is re-used and given to the
-+driver. In 2.5 kernels, the driver is given a NULL entry, and thus,
-+under rare circumstances, may not create the require device nodes.
-+The solution is the same as above.
-+
-+
-+
-+
-+
-+Compilation problems with devfsd
-+
-+Usually, you can compile devfsd just by typing in
-+make in the source directory, followed by a make
-+install (as root). Sometimes, you may have problems, particularly
-+on broken configurations.
-+
-+
-+
-+error messages relating to DEVFSD_NOTIFY_DELETE
-+
-+This happened because you have an ancient set of kernel headers
-+installed in /usr/include/linux or /usr/src/linux.
-+Install kernel 2.4.10 or later. You may need to pass the
-+KERNEL_DIR variable to make (if you did not install
-+the new kernel sources as /usr/src/linux), or you may copy
-+the devfs_fs.h file in the kernel source tree into
-+/usr/include/linux.
-+
-+
-+
-+
-+-----------------------------------------------------------------------------
-+
-+
-+Other resources
-+
-+
-+
-+Douglas Gilbert has written a useful document at
-+
-+http://www.torque.net/sg/devfs_scsi.html which
-+explores the SCSI subsystem and how it interacts with devfs
-+
-+
-+Douglas Gilbert has written another useful document at
-+
-+http://www.torque.net/scsi/SCSI-2.4-HOWTO/ which
-+discusses the Linux SCSI subsystem in 2.4.
-+
-+
-+Johannes Erdfelt has started a discussion paper on Linux and
-+hot-swap devices, describing what the requirements are for a scalable
-+solution and how and why he's used devfs+devfsd. Note that this is an
-+early draft only, available in plain text form at:
-+
-+http://johannes.erdfelt.com/hotswap.txt.
-+Johannes has promised a HTML version will follow.
-+
-+
-+I presented an invited 
-+paper
-+at the
-+
-+2nd Annual Storage Management Workshop held in Miamia, Florida,
-+U.S.A. in October 2000.
-+
-+
-+
-+
-+-----------------------------------------------------------------------------
-+
-+
-+Translations of this document
-+
-+This document has been translated into other languages.
-+
-+
-+
-+
-+The document master (in English) by rgooch@atnf.csiro.au is
-+available at
-+
-+http://www.atnf.csiro.au/~rgooch/linux/docs/devfs.html
-+
-+
-+
-+A Korean translation by viatoris@nownuri.net is available at
-+
-+http://your.destiny.pe.kr/devfs/devfs.html
-+
-+
-+
-+
-+-----------------------------------------------------------------------------
-+Most flags courtesy of ITA's 
-+Flags of All Countries
-+used with permission. 
-diff -urN linux-2.6.19.old/Documentation/filesystems/devfs/ToDo linux-2.6.19.dev/Documentation/filesystems/devfs/ToDo
---- linux-2.6.19.old/Documentation/filesystems/devfs/ToDo	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.19.dev/Documentation/filesystems/devfs/ToDo	2006-12-14 03:12:59.000000000 +0100
-@@ -0,0 +1,40 @@
-+		Device File System (devfs) ToDo List
-+
-+		Richard Gooch <rgooch@atnf.csiro.au>
-+
-+			      3-JUL-2000
-+
-+This is a list of things to be done for better devfs support in the
-+Linux kernel. If you'd like to contribute to the devfs, please have a
-+look at this list for anything that is unallocated. Also, if there are
-+items missing (surely), please contact me so I can add them to the
-+list (preferably with your name attached to them:-).
-+
-+
-+- >256 ptys
-+  Thanks to C. Scott Ananian <cananian@alumni.princeton.edu>
-+
-+- Amiga floppy driver (drivers/block/amiflop.c)
-+
-+- Atari floppy driver (drivers/block/ataflop.c)
-+
-+- SWIM3 (Super Woz Integrated Machine 3) floppy driver (drivers/block/swim3.c)
-+
-+- Amiga ZorroII ramdisc driver (drivers/block/z2ram.c)
-+
-+- Parallel port ATAPI CD-ROM (drivers/block/paride/pcd.c)
-+
-+- Parallel port ATAPI floppy (drivers/block/paride/pf.c)
-+
-+- AP1000 block driver (drivers/ap1000/ap.c, drivers/ap1000/ddv.c)
-+
-+- Archimedes floppy (drivers/acorn/block/fd1772.c)
-+
-+- MFM hard drive (drivers/acorn/block/mfmhd.c)
-+
-+- I2O block device (drivers/message/i2o/i2o_block.c)
-+
-+- ST-RAM device (arch/m68k/atari/stram.c)
-+
-+- Raw devices
-+
-diff -urN linux-2.6.19.old/Documentation/ioctl-number.txt linux-2.6.19.dev/Documentation/ioctl-number.txt
---- linux-2.6.19.old/Documentation/ioctl-number.txt	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/Documentation/ioctl-number.txt	2006-12-14 03:12:59.000000000 +0100
-@@ -119,6 +119,7 @@
- 'c'	00-7F	linux/comstats.h	conflict!
- 'c'	00-7F	linux/coda.h		conflict!
- 'd'	00-FF	linux/char/drm/drm/h	conflict!
-+'d'	00-1F	linux/devfs_fs.h	conflict!
- 'd'	00-DF	linux/video_decoder.h	conflict!
- 'd'	F0-FF	linux/digi1.h
- 'e'	all	linux/digi1.h		conflict!
-diff -urN linux-2.6.19.old/Documentation/kernel-parameters.txt linux-2.6.19.dev/Documentation/kernel-parameters.txt
---- linux-2.6.19.old/Documentation/kernel-parameters.txt	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/Documentation/kernel-parameters.txt	2006-12-14 03:12:59.000000000 +0100
-@@ -35,6 +35,7 @@
- 	APM	Advanced Power Management support is enabled.
- 	AX25	Appropriate AX.25 support is enabled.
- 	CD	Appropriate CD support is enabled.
-+	DEVFS	devfs support is enabled.
- 	DRM	Direct Rendering Management support is enabled.
- 	EDD	BIOS Enhanced Disk Drive Services (EDD) is enabled
- 	EFI	EFI Partitioning (GPT) is enabled
-@@ -456,6 +457,9 @@
- 			Format: <area>[,<node>]
- 			See also Documentation/networking/decnet.txt.
- 
-+	devfs=		[DEVFS]
-+			See Documentation/filesystems/devfs/boot-options.
-+
- 	dhash_entries=	[KNL]
- 			Set number of hash buckets for dentry cache.
- 
-diff -urN linux-2.6.19.old/drivers/block/acsi.c linux-2.6.19.dev/drivers/block/acsi.c
---- linux-2.6.19.old/drivers/block/acsi.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/acsi.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1731,10 +1731,13 @@
- 		struct gendisk *disk = acsi_gendisk[i];
- 		sprintf(disk->disk_name, "ad%c", 'a'+i);
- 		aip = &acsi_info[NDevices];
-+		sprintf(disk->devfs_name, "ad/target%d/lun%d", aip->target, aip->lun);
- 		disk->major = ACSI_MAJOR;
- 		disk->first_minor = i << 4;
--		if (acsi_info[i].type != HARDDISK)
-+		if (acsi_info[i].type != HARDDISK) {
- 			disk->minors = 1;
-+			strcat(disk->devfs_name, "/disc");
-+		}
- 		disk->fops = &acsi_fops;
- 		disk->private_data = &acsi_info[i];
- 		set_capacity(disk, acsi_info[i].size);
-diff -urN linux-2.6.19.old/drivers/block/acsi_slm.c linux-2.6.19.dev/drivers/block/acsi_slm.c
---- linux-2.6.19.old/drivers/block/acsi_slm.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/acsi_slm.c	2006-12-14 03:12:59.000000000 +0100
-@@ -65,6 +65,7 @@
- #include <linux/time.h>
- #include <linux/mm.h>
- #include <linux/slab.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/smp_lock.h>
- 
- #include <asm/pgtable.h>
-@@ -1004,6 +1005,11 @@
- 	BufferP = SLMBuffer;
- 	SLMState = IDLE;
- 	
-+	devfs_mk_dir("slm");
-+	for (i = 0; i < MAX_SLM; i++) {
-+		devfs_mk_cdev(MKDEV(ACSI_MAJOR, i),
-+				S_IFCHR|S_IRUSR|S_IWUSR, "slm/%d", i);
-+	}
- 	return 0;
- }
- 
-@@ -1026,6 +1032,10 @@
- 
- void cleanup_module(void)
- {
-+	int i;
-+	for (i = 0; i < MAX_SLM; i++)
-+		devfs_remove("slm/%d", i);
-+	devfs_remove("slm");
- 	if (unregister_chrdev( ACSI_MAJOR, "slm" ) != 0)
- 		printk( KERN_ERR "acsi_slm: cleanup_module failed\n");
- 	atari_stram_free( SLMBuffer );
-diff -urN linux-2.6.19.old/drivers/block/cpqarray.c linux-2.6.19.dev/drivers/block/cpqarray.c
---- linux-2.6.19.old/drivers/block/cpqarray.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/cpqarray.c	2006-12-14 03:12:59.000000000 +0100
-@@ -32,6 +32,7 @@
- #include <linux/blkpg.h>
- #include <linux/timer.h>
- #include <linux/proc_fs.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/init.h>
- #include <linux/hdreg.h>
- #include <linux/spinlock.h>
-@@ -346,6 +347,7 @@
- 	for(j = 0; j < NWD; j++) {
- 		if (ida_gendisk[i][j]->flags & GENHD_FL_UP)
- 			del_gendisk(ida_gendisk[i][j]);
-+		devfs_remove("ida/c%dd%d",i,j);
- 		put_disk(ida_gendisk[i][j]);
- 	}
- 	blk_cleanup_queue(hba[i]->queue);
-@@ -1808,6 +1810,8 @@
- 
- 				}
- 
-+				sprintf(disk->devfs_name, "ida/c%dd%d", ctlr, log_unit);
-+
- 				info_p->phys_drives =
- 				    sense_config_buf->ctlr_phys_drv;
- 				info_p->drv_assign_map
-@@ -1843,6 +1847,7 @@
- 		}
- 	}
- 
-+	devfs_remove("ida");
- 	remove_proc_entry("cpqarray", proc_root_driver);
- }
- 
-diff -urN linux-2.6.19.old/drivers/block/DAC960.c linux-2.6.19.dev/drivers/block/DAC960.c
---- linux-2.6.19.old/drivers/block/DAC960.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/DAC960.c	2006-12-14 03:12:59.000000000 +0100
-@@ -2530,6 +2530,7 @@
- 	blk_queue_max_sectors(RequestQueue, Controller->MaxBlocksPerCommand);
- 	disk->queue = RequestQueue;
- 	sprintf(disk->disk_name, "rd/c%dd%d", Controller->ControllerNumber, n);
-+	sprintf(disk->devfs_name, "rd/host%d/target%d", Controller->ControllerNumber, n);
- 	disk->major = MajorNumber;
- 	disk->first_minor = n << DAC960_MaxPartitionsBits;
- 	disk->fops = &DAC960_BlockDeviceOperations;
-diff -urN linux-2.6.19.old/drivers/block/floppy.c linux-2.6.19.dev/drivers/block/floppy.c
---- linux-2.6.19.old/drivers/block/floppy.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/floppy.c	2006-12-14 03:12:59.000000000 +0100
-@@ -177,6 +177,7 @@
- #include <linux/ioport.h>
- #include <linux/interrupt.h>
- #include <linux/init.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/platform_device.h>
- #include <linux/buffer_head.h>	/* for invalidate_buffers() */
- #include <linux/mutex.h>
-@@ -223,6 +224,7 @@
- static unsigned short virtual_dma_port = 0x3f0;
- irqreturn_t floppy_interrupt(int irq, void *dev_id);
- static int set_dor(int fdc, char mask, char data);
-+static void register_devfs_entries(int drive) __init;
- 
- #define K_64	0x10000		/* 64KB */
- 
-@@ -3652,6 +3654,7 @@
- 				first = 0;
- 			}
- 			printk("%s fd%d is %s", prepend, drive, name);
-+			register_devfs_entries(drive);
- 		}
- 		*UDP = *params;
- 	}
-@@ -3921,6 +3924,23 @@
- 	.revalidate_disk = floppy_revalidate,
- };
- 
-+static void __init register_devfs_entries(int drive)
-+{
-+	int base_minor = (drive < 4) ? drive : (124 + drive);
-+
-+	if (UDP->cmos < ARRAY_SIZE(default_drive_params)) {
-+		int i = 0;
-+		do {
-+			int minor = base_minor + (table_sup[UDP->cmos][i] << 2);
-+
-+			devfs_mk_bdev(MKDEV(FLOPPY_MAJOR, minor),
-+				      S_IFBLK | S_IRUSR | S_IWUSR | S_IRGRP |
-+				      S_IWGRP, "floppy/%d%s", drive,
-+				      table[table_sup[UDP->cmos][i]]);
-+		} while (table_sup[UDP->cmos][i++]);
-+	}
-+}
-+
- /*
-  * Floppy Driver initialization
-  * =============================
-@@ -4201,9 +4221,11 @@
- 		motor_off_timer[dr].function = motor_off_callback;
- 	}
- 
-+	devfs_mk_dir("floppy");
-+
- 	err = register_blkdev(FLOPPY_MAJOR, "fd");
- 	if (err)
--		goto out_put_disk;
-+		goto out_devfs_remove;
- 
- 	floppy_queue = blk_init_queue(do_fd_request, &floppy_lock);
- 	if (!floppy_queue) {
-@@ -4354,6 +4376,8 @@
- 	blk_cleanup_queue(floppy_queue);
- out_unreg_blkdev:
- 	unregister_blkdev(FLOPPY_MAJOR, "fd");
-+out_devfs_remove:
-+	devfs_remove("floppy");
- out_put_disk:
- 	while (dr--) {
- 		del_timer(&motor_off_timer[dr]);
-@@ -4514,6 +4538,19 @@
- 
- static char *floppy;
- 
-+static void unregister_devfs_entries(int drive)
-+{
-+	int i;
-+
-+	if (UDP->cmos < ARRAY_SIZE(default_drive_params)) {
-+		i = 0;
-+		do {
-+			devfs_remove("floppy/%d%s", drive,
-+				     table[table_sup[UDP->cmos][i]]);
-+		} while (table_sup[UDP->cmos][i++]);
-+	}
-+}
-+
- static void __init parse_floppy_cfg_string(char *cfg)
- {
- 	char *ptr;
-@@ -4550,11 +4587,13 @@
- 		if ((allowed_drive_mask & (1 << drive)) &&
- 		    fdc_state[FDC(drive)].version != FDC_NONE) {
- 			del_gendisk(disks[drive]);
-+			unregister_devfs_entries(drive);
- 			device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos);
- 			platform_device_unregister(&floppy_device[drive]);
- 		}
- 		put_disk(disks[drive]);
- 	}
-+	devfs_remove("floppy");
- 
- 	del_timer_sync(&fd_timeout);
- 	del_timer_sync(&fd_timer);
-diff -urN linux-2.6.19.old/drivers/block/loop.c linux-2.6.19.dev/drivers/block/loop.c
---- linux-2.6.19.old/drivers/block/loop.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/loop.c	2006-12-14 03:12:59.000000000 +0100
-@@ -62,6 +62,7 @@
- #include <linux/blkdev.h>
- #include <linux/blkpg.h>
- #include <linux/init.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/smp_lock.h>
- #include <linux/swap.h>
- #include <linux/slab.h>
-@@ -1426,6 +1427,8 @@
- 			goto out_mem3;
- 	}
- 
-+	devfs_mk_dir("loop");
-+
- 	for (i = 0; i < max_loop; i++) {
- 		struct loop_device *lo = &loop_dev[i];
- 		struct gendisk *disk = disks[i];
-@@ -1443,6 +1446,7 @@
- 		disk->first_minor = i;
- 		disk->fops = &lo_fops;
- 		sprintf(disk->disk_name, "loop%d", i);
-+		sprintf(disk->devfs_name, "loop/%d", i);
- 		disk->private_data = lo;
- 		disk->queue = lo->lo_queue;
- 	}
-@@ -1456,6 +1460,7 @@
- out_mem4:
- 	while (i--)
- 		blk_cleanup_queue(loop_dev[i].lo_queue);
-+	devfs_remove("loop");
- 	i = max_loop;
- out_mem3:
- 	while (i--)
-@@ -1478,6 +1483,7 @@
- 		blk_cleanup_queue(loop_dev[i].lo_queue);
- 		put_disk(disks[i]);
- 	}
-+	devfs_remove("loop");
- 	if (unregister_blkdev(LOOP_MAJOR, "loop"))
- 		printk(KERN_WARNING "loop: cannot unregister blkdev\n");
- 
-diff -urN linux-2.6.19.old/drivers/block/nbd.c linux-2.6.19.dev/drivers/block/nbd.c
---- linux-2.6.19.old/drivers/block/nbd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/nbd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -29,6 +29,8 @@
- #include <linux/kernel.h>
- #include <net/sock.h>
- 
-+#include <linux/devfs_fs_kernel.h>
-+
- #include <asm/uaccess.h>
- #include <asm/system.h>
- #include <asm/types.h>
-@@ -643,6 +645,7 @@
- 	printk(KERN_INFO "nbd: registered device at major %d\n", NBD_MAJOR);
- 	dprintk(DBG_INIT, "nbd: debugflags=0x%x\n", debugflags);
- 
-+	devfs_mk_dir("nbd");
- 	for (i = 0; i < nbds_max; i++) {
- 		struct gendisk *disk = nbd_dev[i].disk;
- 		nbd_dev[i].file = NULL;
-@@ -660,6 +663,7 @@
- 		disk->private_data = &nbd_dev[i];
- 		disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
- 		sprintf(disk->disk_name, "nbd%d", i);
-+		sprintf(disk->devfs_name, "nbd/%d", i);
- 		set_capacity(disk, 0x7ffffc00ULL << 1); /* 2 TB */
- 		add_disk(disk);
- 	}
-@@ -685,6 +689,7 @@
- 			put_disk(disk);
- 		}
- 	}
-+	devfs_remove("nbd");
- 	unregister_blkdev(NBD_MAJOR, "nbd");
- 	printk(KERN_INFO "nbd: unregistered device at major %d\n", NBD_MAJOR);
- }
-diff -urN linux-2.6.19.old/drivers/block/paride/pg.c linux-2.6.19.dev/drivers/block/paride/pg.c
---- linux-2.6.19.old/drivers/block/paride/pg.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/paride/pg.c	2006-12-14 03:12:59.000000000 +0100
-@@ -156,6 +156,7 @@
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/fs.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/delay.h>
- #include <linux/slab.h>
- #include <linux/mtio.h>
-@@ -673,15 +674,25 @@
- 		err = PTR_ERR(pg_class);
- 		goto out_chrdev;
- 	}
-+	devfs_mk_dir("pg");
- 	for (unit = 0; unit < PG_UNITS; unit++) {
- 		struct pg *dev = &devices[unit];
--		if (dev->present)
-+		if (dev->present) {
- 			class_device_create(pg_class, NULL, MKDEV(major, unit),
- 					NULL, "pg%u", unit);
-+			err = devfs_mk_cdev(MKDEV(major, unit),
-+				      S_IFCHR | S_IRUSR | S_IWUSR, "pg/%u",
-+				      unit);
-+			if (err) 
-+				goto out_class;
-+		}
- 	}
- 	err = 0;
- 	goto out;
- 
-+out_class:
-+	class_device_destroy(pg_class, MKDEV(major, unit));
-+	class_destroy(pg_class);
- out_chrdev:
- 	unregister_chrdev(major, "pg");
- out:
-@@ -694,10 +705,13 @@
- 
- 	for (unit = 0; unit < PG_UNITS; unit++) {
- 		struct pg *dev = &devices[unit];
--		if (dev->present)
-+		if (dev->present) {
- 			class_device_destroy(pg_class, MKDEV(major, unit));
-+			devfs_remove("pg/%u", unit);
-+		}
- 	}
- 	class_destroy(pg_class);
-+	devfs_remove("pg");
- 	unregister_chrdev(major, name);
- 
- 	for (unit = 0; unit < PG_UNITS; unit++) {
-diff -urN linux-2.6.19.old/drivers/block/paride/pt.c linux-2.6.19.dev/drivers/block/paride/pt.c
---- linux-2.6.19.old/drivers/block/paride/pt.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/paride/pt.c	2006-12-14 03:12:59.000000000 +0100
-@@ -141,6 +141,7 @@
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/fs.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/delay.h>
- #include <linux/slab.h>
- #include <linux/mtio.h>
-@@ -970,15 +971,32 @@
- 		goto out_chrdev;
- 	}
- 
-+	devfs_mk_dir("pt");
- 	for (unit = 0; unit < PT_UNITS; unit++)
- 		if (pt[unit].present) {
- 			class_device_create(pt_class, NULL, MKDEV(major, unit),
- 					NULL, "pt%d", unit);
-+			err = devfs_mk_cdev(MKDEV(major, unit),
-+				      S_IFCHR | S_IRUSR | S_IWUSR,
-+				      "pt/%d", unit);
-+			if (err) {
-+				class_device_destroy(pt_class, MKDEV(major, unit));
-+				goto out_class;
-+			}
- 			class_device_create(pt_class, NULL, MKDEV(major, unit + 128),
- 					NULL, "pt%dn", unit);
-+			err = devfs_mk_cdev(MKDEV(major, unit + 128),
-+				      S_IFCHR | S_IRUSR | S_IWUSR,
-+				      "pt/%dn", unit);
-+			if (err) {
-+				class_device_destroy(pt_class, MKDEV(major, unit + 128));
-+				goto out_class;
-+			}
- 		}
- 	goto out;
- 
-+out_class:
-+	class_destroy(pt_class);
- out_chrdev:
- 	unregister_chrdev(major, "pt");
- out:
-@@ -991,9 +1009,12 @@
- 	for (unit = 0; unit < PT_UNITS; unit++)
- 		if (pt[unit].present) {
- 			class_device_destroy(pt_class, MKDEV(major, unit));
-+			devfs_remove("pt/%d", unit);
- 			class_device_destroy(pt_class, MKDEV(major, unit + 128));
-+			devfs_remove("pt/%dn", unit);
- 		}
- 	class_destroy(pt_class);
-+	devfs_remove("pt");
- 	unregister_chrdev(major, name);
- 	for (unit = 0; unit < PT_UNITS; unit++)
- 		if (pt[unit].present)
-diff -urN linux-2.6.19.old/drivers/block/pktcdvd.c linux-2.6.19.dev/drivers/block/pktcdvd.c
---- linux-2.6.19.old/drivers/block/pktcdvd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/pktcdvd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -2613,6 +2613,7 @@
- static struct miscdevice pkt_misc = {
- 	.minor 		= MISC_DYNAMIC_MINOR,
- 	.name  		= DRIVER_NAME,
-+	.devfs_name 	= "pktcdvd/control",
- 	.fops  		= &pkt_ctl_fops
- };
- 
-diff -urN linux-2.6.19.old/drivers/block/ps2esdi.c linux-2.6.19.dev/drivers/block/ps2esdi.c
---- linux-2.6.19.old/drivers/block/ps2esdi.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/ps2esdi.c	2006-12-14 03:12:59.000000000 +0100
-@@ -419,6 +419,7 @@
- 		disk->major = PS2ESDI_MAJOR;
- 		disk->first_minor = i<<6;
- 		sprintf(disk->disk_name, "ed%c", 'a'+i);
-+		sprintf(disk->devfs_name, "ed/target%d", i);
- 		disk->fops = &ps2esdi_fops;
- 		ps2esdi_gendisk[i] = disk;
- 	}
-diff -urN linux-2.6.19.old/drivers/block/rd.c linux-2.6.19.dev/drivers/block/rd.c
---- linux-2.6.19.old/drivers/block/rd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/rd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -49,6 +49,7 @@
- #include <linux/module.h>
- #include <linux/moduleparam.h>
- #include <linux/init.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/pagemap.h>
- #include <linux/blkdev.h>
- #include <linux/genhd.h>
-@@ -410,6 +411,7 @@
- 		put_disk(rd_disks[i]);
- 		blk_cleanup_queue(rd_queue[i]);
- 	}
-+	devfs_remove("rd");
- 	unregister_blkdev(RAMDISK_MAJOR, "ramdisk");
- }
- 
-@@ -445,6 +447,8 @@
- 		goto out;
- 	}
- 
-+	devfs_mk_dir("rd");
-+
- 	for (i = 0; i < CONFIG_BLK_DEV_RAM_COUNT; i++) {
- 		struct gendisk *disk = rd_disks[i];
- 
-@@ -458,6 +462,7 @@
- 		disk->queue = rd_queue[i];
- 		disk->flags |= GENHD_FL_SUPPRESS_PARTITION_INFO;
- 		sprintf(disk->disk_name, "ram%d", i);
-+		sprintf(disk->devfs_name, "rd/%d", i);
- 		set_capacity(disk, rd_size * 2);
- 		add_disk(rd_disks[i]);
- 	}
-diff -urN linux-2.6.19.old/drivers/block/sx8.c linux-2.6.19.dev/drivers/block/sx8.c
---- linux-2.6.19.old/drivers/block/sx8.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/sx8.c	2006-12-14 03:12:59.000000000 +0100
-@@ -18,6 +18,7 @@
- #include <linux/spinlock.h>
- #include <linux/blkdev.h>
- #include <linux/sched.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/interrupt.h>
- #include <linux/compiler.h>
- #include <linux/workqueue.h>
-@@ -1509,6 +1510,7 @@
- 		port->disk = disk;
- 		sprintf(disk->disk_name, DRV_NAME "/%u",
- 			(unsigned int) (host->id * CARM_MAX_PORTS) + i);
-+		sprintf(disk->devfs_name, DRV_NAME "/%u_%u", host->id, i);
- 		disk->major = host->major;
- 		disk->first_minor = i * CARM_MINORS_PER_MAJOR;
- 		disk->fops = &carm_bd_ops;
-@@ -1670,6 +1672,8 @@
- 	if (host->flags & FL_DYN_MAJOR)
- 		host->major = rc;
- 
-+	devfs_mk_dir(DRV_NAME);
-+
- 	rc = carm_init_disks(host);
- 	if (rc)
- 		goto err_out_blkdev_disks;
-@@ -1735,6 +1739,7 @@
- 
- 	free_irq(pdev->irq, host);
- 	carm_free_disks(host);
-+	devfs_remove(DRV_NAME);
- 	unregister_blkdev(host->major, host->name);
- 	if (host->major == 160)
- 		clear_bit(0, &carm_major_alloc);
-diff -urN linux-2.6.19.old/drivers/block/ub.c linux-2.6.19.dev/drivers/block/ub.c
---- linux-2.6.19.old/drivers/block/ub.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/ub.c	2006-12-14 03:12:59.000000000 +0100
-@@ -24,10 +24,12 @@
- #include <linux/usb.h>
- #include <linux/usb_usual.h>
- #include <linux/blkdev.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/timer.h>
- #include <scsi/scsi.h>
- 
- #define DRV_NAME "ub"
-+#define DEVFS_NAME DRV_NAME
- 
- #define UB_MAJOR 180
- 
-@@ -2301,6 +2303,7 @@
- 		goto err_diskalloc;
- 
- 	sprintf(disk->disk_name, DRV_NAME "%c", lun->id + 'a');
-+	sprintf(disk->devfs_name, DEVFS_NAME "/%c", lun->id + 'a');
- 	disk->major = UB_MAJOR;
- 	disk->first_minor = lun->id * UB_PARTS_PER_LUN;
- 	disk->fops = &ub_bd_fops;
-@@ -2454,6 +2457,7 @@
- 
- 	if ((rc = register_blkdev(UB_MAJOR, DRV_NAME)) != 0)
- 		goto err_regblkdev;
-+	devfs_mk_dir(DEVFS_NAME);
- 
- 	if ((rc = usb_register(&ub_driver)) != 0)
- 		goto err_register;
-@@ -2462,6 +2466,7 @@
- 	return 0;
- 
- err_register:
-+	devfs_remove(DEVFS_NAME);
- 	unregister_blkdev(UB_MAJOR, DRV_NAME);
- err_regblkdev:
- 	return rc;
-@@ -2471,6 +2476,7 @@
- {
- 	usb_deregister(&ub_driver);
- 
-+	devfs_remove(DEVFS_NAME);
- 	unregister_blkdev(UB_MAJOR, DRV_NAME);
- 	usb_usual_clear_present(USB_US_TYPE_UB);
- }
-diff -urN linux-2.6.19.old/drivers/block/umem.c linux-2.6.19.dev/drivers/block/umem.c
---- linux-2.6.19.old/drivers/block/umem.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/umem.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1192,6 +1192,7 @@
- 	for (i = 0; i < num_cards; i++) {
- 		struct gendisk *disk = mm_gendisk[i];
- 		sprintf(disk->disk_name, "umem%c", 'a'+i);
-+		sprintf(disk->devfs_name, "umem/card%d", i);
- 		spin_lock_init(&cards[i].lock);
- 		disk->major = major_nr;
- 		disk->first_minor  = i << MM_SHIFT;
-diff -urN linux-2.6.19.old/drivers/block/viodasd.c linux-2.6.19.dev/drivers/block/viodasd.c
---- linux-2.6.19.old/drivers/block/viodasd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/viodasd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -59,6 +59,7 @@
-  * numbers 0-255 we get a maximum of 32 disks.
-  */
- #define VIOD_GENHD_NAME		"iseries/vd"
-+#define VIOD_GENHD_DEVFS_NAME	"iseries/disc"
- 
- #define VIOD_VERS		"1.64"
- 
-@@ -522,6 +523,8 @@
- 	else
- 		snprintf(g->disk_name, sizeof(g->disk_name),
- 				VIOD_GENHD_NAME "%c", 'a' + (dev_no % 26));
-+	snprintf(g->devfs_name, sizeof(g->devfs_name),
-+			"%s%d", VIOD_GENHD_DEVFS_NAME, dev_no);
- 	g->fops = &viodasd_fops;
- 	g->queue = q;
- 	g->private_data = d;
-diff -urN linux-2.6.19.old/drivers/block/xd.c linux-2.6.19.dev/drivers/block/xd.c
---- linux-2.6.19.old/drivers/block/xd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/xd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -215,6 +215,7 @@
- 		disk->major = XT_DISK_MAJOR;
- 		disk->first_minor = i<<6;
- 		sprintf(disk->disk_name, "xd%c", i+'a');
-+		sprintf(disk->devfs_name, "xd/target%d", i);
- 		disk->fops = &xd_fops;
- 		disk->private_data = p;
- 		disk->queue = xd_queue;
-diff -urN linux-2.6.19.old/drivers/block/z2ram.c linux-2.6.19.dev/drivers/block/z2ram.c
---- linux-2.6.19.old/drivers/block/z2ram.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/block/z2ram.c	2006-12-14 03:12:59.000000000 +0100
-@@ -354,6 +354,7 @@
-     z2ram_gendisk->first_minor = 0;
-     z2ram_gendisk->fops = &z2_fops;
-     sprintf(z2ram_gendisk->disk_name, "z2ram");
-+    strcpy(z2ram_gendisk->devfs_name, z2ram_gendisk->disk_name);
- 
-     z2ram_gendisk->queue = z2_queue;
-     add_disk(z2ram_gendisk);
-diff -urN linux-2.6.19.old/drivers/cdrom/aztcd.c linux-2.6.19.dev/drivers/cdrom/aztcd.c
---- linux-2.6.19.old/drivers/cdrom/aztcd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/cdrom/aztcd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1918,6 +1918,7 @@
- 	azt_disk->first_minor = 0;
- 	azt_disk->fops = &azt_fops;
- 	sprintf(azt_disk->disk_name, "aztcd");
-+	sprintf(azt_disk->devfs_name, "aztcd");
- 	azt_disk->queue = azt_queue;
- 	add_disk(azt_disk);
- 	azt_invalidate_buffers();
-diff -urN linux-2.6.19.old/drivers/cdrom/cdu31a.c linux-2.6.19.dev/drivers/cdrom/cdu31a.c
---- linux-2.6.19.old/drivers/cdrom/cdu31a.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/cdrom/cdu31a.c	2006-12-14 03:12:59.000000000 +0100
-@@ -161,6 +161,7 @@
- #include <linux/hdreg.h>
- #include <linux/genhd.h>
- #include <linux/ioport.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/string.h>
- #include <linux/slab.h>
- #include <linux/init.h>
-diff -urN linux-2.6.19.old/drivers/cdrom/cm206.c linux-2.6.19.dev/drivers/cdrom/cm206.c
---- linux-2.6.19.old/drivers/cdrom/cm206.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/cdrom/cm206.c	2006-12-14 03:12:59.000000000 +0100
-@@ -187,6 +187,7 @@
- #include <linux/interrupt.h>
- #include <linux/timer.h>
- #include <linux/cdrom.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/ioport.h>
- #include <linux/mm.h>
- #include <linux/slab.h>
-diff -urN linux-2.6.19.old/drivers/cdrom/gscd.c linux-2.6.19.dev/drivers/cdrom/gscd.c
---- linux-2.6.19.old/drivers/cdrom/gscd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/cdrom/gscd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -955,6 +955,7 @@
- 	gscd_disk->first_minor = 0;
- 	gscd_disk->fops = &gscd_fops;
- 	sprintf(gscd_disk->disk_name, "gscd");
-+	sprintf(gscd_disk->devfs_name, "gscd");
- 
- 	if (register_blkdev(MAJOR_NR, "gscd")) {
- 		ret = -EIO;
-diff -urN linux-2.6.19.old/drivers/cdrom/mcdx.c linux-2.6.19.dev/drivers/cdrom/mcdx.c
---- linux-2.6.19.old/drivers/cdrom/mcdx.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/cdrom/mcdx.c	2006-12-14 03:12:59.000000000 +0100
-@@ -74,6 +74,7 @@
- #include <linux/major.h>
- #define MAJOR_NR MITSUMI_X_CDROM_MAJOR
- #include <linux/blkdev.h>
-+#include <linux/devfs_fs_kernel.h>
- 
- #include "mcdx.h"
- 
-diff -urN linux-2.6.19.old/drivers/cdrom/optcd.c linux-2.6.19.dev/drivers/cdrom/optcd.c
---- linux-2.6.19.old/drivers/cdrom/optcd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/cdrom/optcd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -2033,6 +2033,7 @@
- 	optcd_disk->first_minor = 0;
- 	optcd_disk->fops = &opt_fops;
- 	sprintf(optcd_disk->disk_name, "optcd");
-+	sprintf(optcd_disk->devfs_name, "optcd");
- 
- 	if (!request_region(optcd_port, 4, "optcd")) {
- 		printk(KERN_ERR "optcd: conflict, I/O port 0x%x already used\n",
-diff -urN linux-2.6.19.old/drivers/cdrom/sbpcd.c linux-2.6.19.dev/drivers/cdrom/sbpcd.c
---- linux-2.6.19.old/drivers/cdrom/sbpcd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/cdrom/sbpcd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -371,6 +371,7 @@
- #include <linux/kernel.h>
- #include <linux/cdrom.h>
- #include <linux/ioport.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/major.h>
- #include <linux/string.h>
- #include <linux/vmalloc.h>
-@@ -5806,6 +5807,8 @@
- 		return -ENOMEM;
- 	}
- 
-+	devfs_mk_dir("sbp");
-+
- 	for (j=0;j<NR_SBPCD;j++)
- 	{
- 		struct cdrom_device_info * sbpcd_infop;
-@@ -5867,6 +5870,7 @@
- 		disk->fops = &sbpcd_bdops;
- 		strcpy(disk->disk_name, sbpcd_infop->name);
- 		disk->flags = GENHD_FL_CD;
-+		sprintf(disk->devfs_name, "sbp/c0t%d", p->drv_id);
- 		p->disk = disk;
- 		if (register_cdrom(sbpcd_infop))
- 		{
-@@ -5901,6 +5905,7 @@
- 		if (D_S[j].drv_id==-1) continue;
- 		del_gendisk(D_S[j].disk);
- 		put_disk(D_S[j].disk);
-+		devfs_remove("sbp/c0t%d", j);
- 		vfree(D_S[j].sbp_buf);
- 		if (D_S[j].sbp_audsiz>0)
- 			vfree(D_S[j].aud_buf);
-@@ -5911,6 +5916,7 @@
- 		}
- 		vfree(D_S[j].sbpcd_infop);
- 	}
-+	devfs_remove("sbp");
- 	msg(DBG_INF, "%s module released.\n", major_name);
- }
- 
-diff -urN linux-2.6.19.old/drivers/cdrom/sjcd.c linux-2.6.19.dev/drivers/cdrom/sjcd.c
---- linux-2.6.19.old/drivers/cdrom/sjcd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/cdrom/sjcd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1695,6 +1695,7 @@
- 	sjcd_disk->first_minor = 0,
- 	sjcd_disk->fops = &sjcd_fops,
- 	sprintf(sjcd_disk->disk_name, "sjcd");
-+	sprintf(sjcd_disk->devfs_name, "sjcd");
- 
- 	if (!request_region(sjcd_base, 4,"sjcd")) {
- 		printk
-diff -urN linux-2.6.19.old/drivers/cdrom/sonycd535.c linux-2.6.19.dev/drivers/cdrom/sonycd535.c
---- linux-2.6.19.old/drivers/cdrom/sonycd535.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/cdrom/sonycd535.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1589,6 +1589,7 @@
- 	cdu_disk->first_minor = 0;
- 	cdu_disk->fops = &cdu_fops;
- 	sprintf(cdu_disk->disk_name, "cdu");
-+	sprintf(cdu_disk->devfs_name, "cdu535");
- 
- 	if (!request_region(sony535_cd_base_io, 4, CDU535_HANDLE)) {
- 		printk(KERN_WARNING"sonycd535: Unable to request region 0x%x\n",
-diff -urN linux-2.6.19.old/drivers/cdrom/viocd.c linux-2.6.19.dev/drivers/cdrom/viocd.c
---- linux-2.6.19.old/drivers/cdrom/viocd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/cdrom/viocd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -49,6 +49,7 @@
- #include <asm/iseries/vio.h>
- 
- #define VIOCD_DEVICE			"iseries/vcd"
-+#define VIOCD_DEVICE_DEVFS		"iseries/vcd"
- 
- #define VIOCD_VERS "1.06"
- 
-@@ -687,6 +688,8 @@
- 	gendisk->first_minor = deviceno;
- 	strncpy(gendisk->disk_name, c->name,
- 			sizeof(gendisk->disk_name));
-+	snprintf(gendisk->devfs_name, sizeof(gendisk->devfs_name),
-+			VIOCD_DEVICE_DEVFS "%d", deviceno);
- 	blk_queue_max_hw_segments(q, 1);
- 	blk_queue_max_phys_segments(q, 1);
- 	blk_queue_max_sectors(q, 4096 / 512);
-diff -urN linux-2.6.19.old/drivers/char/cyclades.c linux-2.6.19.dev/drivers/char/cyclades.c
---- linux-2.6.19.old/drivers/char/cyclades.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/cyclades.c	2006-12-14 03:12:59.000000000 +0100
-@@ -5227,6 +5227,7 @@
-     cy_serial_driver->owner = THIS_MODULE;
-     cy_serial_driver->driver_name = "cyclades";
-     cy_serial_driver->name = "ttyC";
-+    cy_serial_driver->devfs_name = "tts/C";
-     cy_serial_driver->major = CYCLADES_MAJOR;
-     cy_serial_driver->minor_start = 0;
-     cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
-diff -urN linux-2.6.19.old/drivers/char/dsp56k.c linux-2.6.19.dev/drivers/char/dsp56k.c
---- linux-2.6.19.old/drivers/char/dsp56k.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/dsp56k.c	2006-12-14 03:12:59.000000000 +0100
-@@ -33,6 +33,7 @@
- #include <linux/fs.h>
- #include <linux/mm.h>
- #include <linux/init.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/smp_lock.h>
- #include <linux/device.h>
- 
-@@ -517,9 +518,17 @@
- 	}
- 	class_device_create(dsp56k_class, NULL, MKDEV(DSP56K_MAJOR, 0), NULL, "dsp56k");
- 
-+	err = devfs_mk_cdev(MKDEV(DSP56K_MAJOR, 0),
-+		      S_IFCHR | S_IRUSR | S_IWUSR, "dsp56k");
-+	if(err)
-+		goto out_class;
-+
- 	printk(banner);
- 	goto out;
- 
-+out_class:
-+	class_device_destroy(dsp56k_class, MKDEV(DSP56K_MAJOR, 0));
-+	class_destroy(dsp56k_class);
- out_chrdev:
- 	unregister_chrdev(DSP56K_MAJOR, "dsp56k");
- out:
-@@ -532,6 +541,7 @@
- 	class_device_destroy(dsp56k_class, MKDEV(DSP56K_MAJOR, 0));
- 	class_destroy(dsp56k_class);
- 	unregister_chrdev(DSP56K_MAJOR, "dsp56k");
-+	devfs_remove("dsp56k");
- }
- module_exit(dsp56k_cleanup_driver);
- 
-diff -urN linux-2.6.19.old/drivers/char/dtlk.c linux-2.6.19.dev/drivers/char/dtlk.c
---- linux-2.6.19.old/drivers/char/dtlk.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/dtlk.c	2006-12-14 03:12:59.000000000 +0100
-@@ -62,6 +62,7 @@
- #include <linux/init.h>		/* for __init, module_{init,exit} */
- #include <linux/poll.h>		/* for POLLIN, etc. */
- #include <linux/dtlk.h>		/* local header file for DoubleTalk values */
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/smp_lock.h>
- 
- #ifdef TRACING
-@@ -336,6 +337,9 @@
- 	if (dtlk_dev_probe() == 0)
- 		printk(", MAJOR %d\n", dtlk_major);
- 
-+	devfs_mk_cdev(MKDEV(dtlk_major, DTLK_MINOR),
-+		       S_IFCHR | S_IRUSR | S_IWUSR, "dtlk");
-+
- 	init_timer(&dtlk_timer);
- 	dtlk_timer.function = dtlk_timer_tick;
- 	init_waitqueue_head(&dtlk_process_list);
-@@ -353,6 +357,7 @@
- 
- 	dtlk_write_tts(DTLK_CLEAR);
- 	unregister_chrdev(dtlk_major, "dtlk");
-+	devfs_remove("dtlk");
- 	release_region(dtlk_port_lpc, DTLK_IO_EXTENT);
- }
- 
-diff -urN linux-2.6.19.old/drivers/char/epca.c linux-2.6.19.dev/drivers/char/epca.c
---- linux-2.6.19.old/drivers/char/epca.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/epca.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1227,6 +1227,7 @@
- 
- 	pc_driver->owner = THIS_MODULE;
- 	pc_driver->name = "ttyD"; 
-+	pc_driver->devfs_name = "tts/D";
- 	pc_driver->major = DIGI_MAJOR; 
- 	pc_driver->minor_start = 0;
- 	pc_driver->type = TTY_DRIVER_TYPE_SERIAL;
-diff -urN linux-2.6.19.old/drivers/char/esp.c linux-2.6.19.dev/drivers/char/esp.c
---- linux-2.6.19.old/drivers/char/esp.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/esp.c	2006-12-14 03:12:59.000000000 +0100
-@@ -2448,6 +2448,7 @@
- 	
- 	esp_driver->owner = THIS_MODULE;
- 	esp_driver->name = "ttyP";
-+	esp_driver->devfs_name = "tts/P";
- 	esp_driver->major = ESP_IN_MAJOR;
- 	esp_driver->minor_start = 0;
- 	esp_driver->type = TTY_DRIVER_TYPE_SERIAL;
-diff -urN linux-2.6.19.old/drivers/char/ftape/zftape/zftape-init.c linux-2.6.19.dev/drivers/char/ftape/zftape/zftape-init.c
---- linux-2.6.19.old/drivers/char/ftape/zftape/zftape-init.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/ftape/zftape/zftape-init.c	2006-12-14 03:12:59.000000000 +0100
-@@ -32,6 +32,7 @@
- #endif
- #include <linux/fcntl.h>
- #include <linux/smp_lock.h>
-+#include <linux/devfs_fs_kernel.h>
- 
- #include <linux/zftape.h>
- #include <linux/init.h>
-@@ -330,11 +331,29 @@
- 	zft_class = class_create(THIS_MODULE, "zft");
- 	for (i = 0; i < 4; i++) {
- 		class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i), NULL, "qft%i", i);
-+		devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i),
-+				S_IFCHR | S_IRUSR | S_IWUSR,
-+				"qft%i", i);
- 		class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 4), NULL, "nqft%i", i);
-+		devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 4),
-+				S_IFCHR | S_IRUSR | S_IWUSR,
-+				"nqft%i", i);
- 		class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 16), NULL, "zqft%i", i);
-+		devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 16),
-+				S_IFCHR | S_IRUSR | S_IWUSR,
-+				"zqft%i", i);
- 		class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 20), NULL, "nzqft%i", i);
-+		devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 20),
-+				S_IFCHR | S_IRUSR | S_IWUSR,
-+				"nzqft%i", i);
- 		class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 32), NULL, "rawqft%i", i);
-+		devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 32),
-+				S_IFCHR | S_IRUSR | S_IWUSR,
-+				"rawqft%i", i);
- 		class_device_create(zft_class, NULL, MKDEV(QIC117_TAPE_MAJOR, i + 36), NULL, "nrawrawqft%i", i);
-+		devfs_mk_cdev(MKDEV(QIC117_TAPE_MAJOR, i + 36),
-+				S_IFCHR | S_IRUSR | S_IWUSR,
-+				"nrawqft%i", i);
- 	}
- 
- #ifdef CONFIG_ZFT_COMPRESSOR
-@@ -360,11 +379,17 @@
- 		TRACE(ft_t_info, "successful");
- 	}
-         for (i = 0; i < 4; i++) {
-+		devfs_remove("qft%i", i);
- 		class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i));
-+		devfs_remove("nqft%i", i);
- 		class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 4));
-+		devfs_remove("zqft%i", i);
- 		class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 16));
-+		devfs_remove("nzqft%i", i);
- 		class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 20));
-+		devfs_remove("rawqft%i", i);
- 		class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 32));
-+		devfs_remove("nrawqft%i", i);
- 		class_device_destroy(zft_class, MKDEV(QIC117_TAPE_MAJOR, i + 36));
- 	}
- 	class_destroy(zft_class);
-diff -urN linux-2.6.19.old/drivers/char/hvc_console.c linux-2.6.19.dev/drivers/char/hvc_console.c
---- linux-2.6.19.old/drivers/char/hvc_console.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/hvc_console.c	2006-12-14 03:12:59.000000000 +0100
-@@ -822,6 +822,7 @@
- 		return -ENOMEM;
- 
- 	drv->owner = THIS_MODULE;
-+	drv->devfs_name = "hvc/";
- 	drv->driver_name = "hvc";
- 	drv->name = "hvc";
- 	drv->major = HVC_MAJOR;
-diff -urN linux-2.6.19.old/drivers/char/hvcs.c linux-2.6.19.dev/drivers/char/hvcs.c
---- linux-2.6.19.old/drivers/char/hvcs.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/hvcs.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1361,6 +1361,7 @@
- 
- 	hvcs_tty_driver->driver_name = hvcs_driver_name;
- 	hvcs_tty_driver->name = hvcs_device_node;
-+	hvcs_tty_driver->devfs_name = hvcs_device_node;
- 
- 	/*
- 	 * We'll let the system assign us a major number, indicated by leaving
-diff -urN linux-2.6.19.old/drivers/char/hvsi.c linux-2.6.19.dev/drivers/char/hvsi.c
---- linux-2.6.19.old/drivers/char/hvsi.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/hvsi.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1152,6 +1152,7 @@
- 		return -ENOMEM;
- 
- 	hvsi_driver->owner = THIS_MODULE;
-+	hvsi_driver->devfs_name = "hvsi/";
- 	hvsi_driver->driver_name = "hvsi";
- 	hvsi_driver->name = "hvsi";
- 	hvsi_driver->major = HVSI_MAJOR;
-diff -urN linux-2.6.19.old/drivers/char/ip2/ip2main.c linux-2.6.19.dev/drivers/char/ip2/ip2main.c
---- linux-2.6.19.old/drivers/char/ip2/ip2main.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/ip2/ip2main.c	2006-12-14 03:12:59.000000000 +0100
-@@ -90,6 +90,7 @@
- #include <linux/module.h>
- #include <linux/signal.h>
- #include <linux/sched.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/timer.h>
- #include <linux/interrupt.h>
- #include <linux/pci.h>
-@@ -412,7 +413,9 @@
- 			/* free io addresses and Tibet */
- 			release_region( ip2config.addr[i], 8 );
- 			class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i));
-+			devfs_remove("ip2/ipl%d", i);
- 			class_device_destroy(ip2_class, MKDEV(IP2_IPL_MAJOR, 4 * i + 1));
-+			devfs_remove("ip2/stat%d", i);
- 		}
- 		/* Disable and remove interrupt handler. */
- 		if ( (ip2config.irq[i] > 0) && have_requested_irq(ip2config.irq[i]) ) {	
-@@ -421,6 +424,7 @@
- 		}
- 	}
- 	class_destroy(ip2_class);
-+	devfs_remove("ip2");
- 	if ( ( err = tty_unregister_driver ( ip2_tty_driver ) ) ) {
- 		printk(KERN_ERR "IP2: failed to unregister tty driver (%d)\n", err);
- 	}
-@@ -674,6 +678,7 @@
- 
- 	ip2_tty_driver->owner		    = THIS_MODULE;
- 	ip2_tty_driver->name                 = "ttyF";
-+	ip2_tty_driver->devfs_name	    = "tts/F";
- 	ip2_tty_driver->driver_name          = pcDriver_name;
- 	ip2_tty_driver->major                = IP2_TTY_MAJOR;
- 	ip2_tty_driver->minor_start          = 0;
-@@ -722,9 +727,26 @@
- 				class_device_create(ip2_class, NULL,
- 						MKDEV(IP2_IPL_MAJOR, 4 * i),
- 						NULL, "ipl%d", i);
-+				err = devfs_mk_cdev(MKDEV(IP2_IPL_MAJOR, 4 * i),
-+						S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR,
-+						"ip2/ipl%d", i);
-+				if (err) {
-+					class_device_destroy(ip2_class,
-+						MKDEV(IP2_IPL_MAJOR, 4 * i));
-+					goto out_class;
-+				}
-+
- 				class_device_create(ip2_class, NULL,
- 						MKDEV(IP2_IPL_MAJOR, 4 * i + 1),
- 						NULL, "stat%d", i);
-+				err = devfs_mk_cdev(MKDEV(IP2_IPL_MAJOR, 4 * i + 1),
-+						S_IRUSR | S_IWUSR | S_IRGRP | S_IFCHR,
-+						"ip2/stat%d", i);
-+				if (err) {
-+					class_device_destroy(ip2_class,
-+						MKDEV(IP2_IPL_MAJOR, 4 * i + 1));
-+					goto out_class;
-+				}
- 
- 			    for ( box = 0; box < ABS_MAX_BOXES; ++box )
- 			    {
-diff -urN linux-2.6.19.old/drivers/char/ipmi/ipmi_devintf.c linux-2.6.19.dev/drivers/char/ipmi/ipmi_devintf.c
---- linux-2.6.19.old/drivers/char/ipmi/ipmi_devintf.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/ipmi/ipmi_devintf.c	2006-12-14 03:12:59.000000000 +0100
-@@ -39,6 +39,7 @@
- #include <linux/poll.h>
- #include <linux/spinlock.h>
- #include <linux/slab.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/ipmi.h>
- #include <linux/mutex.h>
- #include <linux/init.h>
-@@ -832,6 +833,9 @@
- 	dev_t dev = MKDEV(ipmi_major, if_num);
- 	struct ipmi_reg_list *entry;
- 
-+	devfs_mk_cdev(dev, S_IFCHR | S_IRUSR | S_IWUSR,
-+		      "ipmidev/%d", if_num);
-+
- 	entry = kmalloc(sizeof(*entry), GFP_KERNEL);
- 	if (!entry) {
- 		printk(KERN_ERR "ipmi_devintf: Unable to create the"
-@@ -861,6 +865,7 @@
- 	}
- 	class_device_destroy(ipmi_class, dev);
- 	mutex_unlock(&reg_list_mutex);
-+	devfs_remove("ipmidev/%d", if_num);
- }
- 
- static struct ipmi_smi_watcher smi_watcher =
-@@ -896,6 +901,8 @@
- 		ipmi_major = rv;
- 	}
- 
-+	devfs_mk_dir(DEVICE_NAME);
-+
- 	rv = ipmi_smi_watcher_register(&smi_watcher);
- 	if (rv) {
- 		unregister_chrdev(ipmi_major, DEVICE_NAME);
-@@ -920,6 +927,7 @@
- 	mutex_unlock(&reg_list_mutex);
- 	class_destroy(ipmi_class);
- 	ipmi_smi_watcher_unregister(&smi_watcher);
-+	devfs_remove(DEVICE_NAME);
- 	unregister_chrdev(ipmi_major, DEVICE_NAME);
- }
- module_exit(cleanup_ipmi);
-diff -urN linux-2.6.19.old/drivers/char/isicom.c linux-2.6.19.dev/drivers/char/isicom.c
---- linux-2.6.19.old/drivers/char/isicom.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/isicom.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1582,6 +1582,7 @@
- 
- 	isicom_normal->owner			= THIS_MODULE;
- 	isicom_normal->name 			= "ttyM";
-+	isicom_normal->devfs_name	 	= "isicom/";
- 	isicom_normal->major			= ISICOM_NMAJOR;
- 	isicom_normal->minor_start		= 0;
- 	isicom_normal->type			= TTY_DRIVER_TYPE_SERIAL;
-diff -urN linux-2.6.19.old/drivers/char/lp.c linux-2.6.19.dev/drivers/char/lp.c
---- linux-2.6.19.old/drivers/char/lp.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/lp.c	2006-12-14 03:12:59.000000000 +0100
-@@ -119,6 +119,7 @@
- #include <linux/major.h>
- #include <linux/sched.h>
- #include <linux/smp_lock.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/slab.h>
- #include <linux/fcntl.h>
- #include <linux/delay.h>
-@@ -805,6 +806,8 @@
- 
- 	class_device_create(lp_class, NULL, MKDEV(LP_MAJOR, nr), NULL,
- 				"lp%d", nr);
-+	devfs_mk_cdev(MKDEV(LP_MAJOR, nr), S_IFCHR | S_IRUGO | S_IWUGO,
-+			"printers/%d", nr);
- 
- 	printk(KERN_INFO "lp%d: using %s (%s).\n", nr, port->name, 
- 	       (port->irq == PARPORT_IRQ_NONE)?"polling":"interrupt-driven");
-@@ -903,6 +906,7 @@
- 		return -EIO;
- 	}
- 
-+	devfs_mk_dir("printers");
- 	lp_class = class_create(THIS_MODULE, "printer");
- 	if (IS_ERR(lp_class)) {
- 		err = PTR_ERR(lp_class);
-@@ -928,6 +932,7 @@
- out_class:
- 	class_destroy(lp_class);
- out_reg:
-+	devfs_remove("printers");
- 	unregister_chrdev(LP_MAJOR, "lp");
- 	return err;
- }
-@@ -975,8 +980,10 @@
- 		if (lp_table[offset].dev == NULL)
- 			continue;
- 		parport_unregister_device(lp_table[offset].dev);
-+		devfs_remove("printers/%d", offset);
- 		class_device_destroy(lp_class, MKDEV(LP_MAJOR, offset));
- 	}
-+	devfs_remove("printers");
- 	class_destroy(lp_class);
- }
- 
-diff -urN linux-2.6.19.old/drivers/char/mem.c linux-2.6.19.dev/drivers/char/mem.c
---- linux-2.6.19.old/drivers/char/mem.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/mem.c	2006-12-14 03:12:59.000000000 +0100
-@@ -19,6 +19,7 @@
- #include <linux/tty.h>
- #include <linux/capability.h>
- #include <linux/smp_lock.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/ptrace.h>
- #include <linux/device.h>
- #include <linux/highmem.h>
-@@ -979,10 +980,13 @@
- 		printk("unable to get major %d for memory devs\n", MEM_MAJOR);
- 
- 	mem_class = class_create(THIS_MODULE, "mem");
--	for (i = 0; i < ARRAY_SIZE(devlist); i++)
-+	for (i = 0; i < ARRAY_SIZE(devlist); i++) {
- 		class_device_create(mem_class, NULL,
- 					MKDEV(MEM_MAJOR, devlist[i].minor),
- 					NULL, devlist[i].name);
-+		devfs_mk_cdev(MKDEV(MEM_MAJOR, devlist[i].minor),
-+				S_IFCHR | devlist[i].mode, devlist[i].name);
-+	}
- 	
- 	return 0;
- }
-diff -urN linux-2.6.19.old/drivers/char/misc.c linux-2.6.19.dev/drivers/char/misc.c
---- linux-2.6.19.old/drivers/char/misc.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/misc.c	2006-12-14 03:12:59.000000000 +0100
-@@ -43,6 +43,7 @@
- #include <linux/slab.h>
- #include <linux/proc_fs.h>
- #include <linux/seq_file.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/stat.h>
- #include <linux/init.h>
- #include <linux/device.h>
-@@ -226,6 +227,10 @@
- 
- 	if (misc->minor < DYNAMIC_MINORS)
- 		misc_minors[misc->minor >> 3] |= 1 << (misc->minor & 7);
-+	if (misc->devfs_name[0] == '\0') {
-+		snprintf(misc->devfs_name, sizeof(misc->devfs_name),
-+				"misc/%s", misc->name);
-+	}
- 	dev = MKDEV(MISC_MAJOR, misc->minor);
- 
- 	misc->class = class_device_create(misc_class, NULL, dev, misc->dev,
-@@ -235,6 +240,13 @@
- 		goto out;
- 	}
- 
-+	err = devfs_mk_cdev(dev, S_IFCHR|S_IRUSR|S_IWUSR|S_IRGRP, 
-+			    misc->devfs_name);
-+	if (err) {
-+		class_device_destroy(misc_class, dev);
-+		goto out;
-+	}
-+
- 	/*
- 	 * Add it to the front, so that later devices can "override"
- 	 * earlier defaults
-@@ -265,6 +277,7 @@
- 	down(&misc_sem);
- 	list_del(&misc->list);
- 	class_device_destroy(misc_class, MKDEV(MISC_MAJOR, misc->minor));
-+	devfs_remove(misc->devfs_name);
- 	if (i < DYNAMIC_MINORS && i>0) {
- 		misc_minors[i>>3] &= ~(1 << (misc->minor & 7));
- 	}
-diff -urN linux-2.6.19.old/drivers/char/mmtimer.c linux-2.6.19.dev/drivers/char/mmtimer.c
---- linux-2.6.19.old/drivers/char/mmtimer.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/mmtimer.c	2006-12-14 03:12:59.000000000 +0100
-@@ -25,6 +25,7 @@
- #include <linux/init.h>
- #include <linux/errno.h>
- #include <linux/mm.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/mmtimer.h>
- #include <linux/miscdevice.h>
- #include <linux/posix-timers.h>
-@@ -692,6 +693,7 @@
- 		return -1;
- 	}
- 
-+	strcpy(mmtimer_miscdev.devfs_name, MMTIMER_NAME);
- 	if (misc_register(&mmtimer_miscdev)) {
- 		printk(KERN_ERR "%s: failed to register device\n",
- 		       MMTIMER_NAME);
-diff -urN linux-2.6.19.old/drivers/char/moxa.c linux-2.6.19.dev/drivers/char/moxa.c
---- linux-2.6.19.old/drivers/char/moxa.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/moxa.c	2006-12-14 03:12:59.000000000 +0100
-@@ -346,6 +346,7 @@
- 	init_MUTEX(&moxaBuffSem);
- 	moxaDriver->owner = THIS_MODULE;
- 	moxaDriver->name = "ttyMX";
-+	moxaDriver->devfs_name = "tts/a";
- 	moxaDriver->major = ttymajor;
- 	moxaDriver->minor_start = 0;
- 	moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
-diff -urN linux-2.6.19.old/drivers/char/ppdev.c linux-2.6.19.dev/drivers/char/ppdev.c
---- linux-2.6.19.old/drivers/char/ppdev.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/ppdev.c	2006-12-14 03:12:59.000000000 +0100
-@@ -60,6 +60,7 @@
- #include <linux/init.h>
- #include <linux/sched.h>
- #include <linux/device.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/ioctl.h>
- #include <linux/parport.h>
- #include <linux/ctype.h>
-@@ -781,6 +782,11 @@
- 		err = PTR_ERR(ppdev_class);
- 		goto out_chrdev;
- 	}
-+	devfs_mk_dir("parports");
-+	for (i = 0; i < PARPORT_MAX; i++) {
-+		devfs_mk_cdev(MKDEV(PP_MAJOR, i),
-+				S_IFCHR | S_IRUGO | S_IWUGO, "parports/%d", i);
-+	}
- 	if (parport_register_driver(&pp_driver)) {
- 		printk (KERN_WARNING CHRDEV ": unable to register with parport\n");
- 		goto out_class;
-@@ -790,6 +796,9 @@
- 	goto out;
- 
- out_class:
-+	for (i = 0; i < PARPORT_MAX; i++)
-+		devfs_remove("parports/%d", i);
-+	devfs_remove("parports");
- 	class_destroy(ppdev_class);
- out_chrdev:
- 	unregister_chrdev(PP_MAJOR, CHRDEV);
-@@ -799,8 +808,12 @@
- 
- static void __exit ppdev_cleanup (void)
- {
-+	int i;
- 	/* Clean up all parport stuff */
-+	for (i = 0; i < PARPORT_MAX; i++)
-+		devfs_remove("parports/%d", i);
- 	parport_unregister_driver(&pp_driver);
-+	devfs_remove("parports");
- 	class_destroy(ppdev_class);
- 	unregister_chrdev (PP_MAJOR, CHRDEV);
- }
-diff -urN linux-2.6.19.old/drivers/char/pty.c linux-2.6.19.dev/drivers/char/pty.c
---- linux-2.6.19.old/drivers/char/pty.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/pty.c	2006-12-14 03:12:59.000000000 +0100
-@@ -23,6 +23,7 @@
- #include <linux/major.h>
- #include <linux/mm.h>
- #include <linux/init.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/sysctl.h>
- 
- #include <asm/uaccess.h>
-@@ -263,6 +264,7 @@
- 	pty_driver->owner = THIS_MODULE;
- 	pty_driver->driver_name = "pty_master";
- 	pty_driver->name = "pty";
-+	pty_driver->devfs_name = "pty/m";
- 	pty_driver->major = PTY_MASTER_MAJOR;
- 	pty_driver->minor_start = 0;
- 	pty_driver->type = TTY_DRIVER_TYPE_PTY;
-@@ -280,6 +282,7 @@
- 	pty_slave_driver->owner = THIS_MODULE;
- 	pty_slave_driver->driver_name = "pty_slave";
- 	pty_slave_driver->name = "ttyp";
-+	pty_slave_driver->devfs_name = "pty/s";
- 	pty_slave_driver->major = PTY_SLAVE_MAJOR;
- 	pty_slave_driver->minor_start = 0;
- 	pty_slave_driver->type = TTY_DRIVER_TYPE_PTY;
-@@ -347,6 +350,7 @@
- 
- static void __init unix98_pty_init(void)
- {
-+	devfs_mk_dir("pts");
- 	ptm_driver = alloc_tty_driver(NR_UNIX98_PTY_MAX);
- 	if (!ptm_driver)
- 		panic("Couldn't allocate Unix98 ptm driver");
-diff -urN linux-2.6.19.old/drivers/char/raw.c linux-2.6.19.dev/drivers/char/raw.c
---- linux-2.6.19.old/drivers/char/raw.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/raw.c	2006-12-14 03:12:59.000000000 +0100
-@@ -10,6 +10,7 @@
- 
- #include <linux/init.h>
- #include <linux/fs.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/major.h>
- #include <linux/blkdev.h>
- #include <linux/module.h>
-@@ -285,6 +286,13 @@
- 	}
- 	class_device_create(raw_class, NULL, MKDEV(RAW_MAJOR, 0), NULL, "rawctl");
- 
-+	devfs_mk_cdev(MKDEV(RAW_MAJOR, 0),
-+		      S_IFCHR | S_IRUGO | S_IWUGO,
-+		      "raw/rawctl");
-+	for (i = 1; i < MAX_RAW_MINORS; i++)
-+		devfs_mk_cdev(MKDEV(RAW_MAJOR, i),
-+			      S_IFCHR | S_IRUGO | S_IWUGO,
-+			      "raw/raw%d", i);
- 	return 0;
- 
- error_region:
-@@ -295,6 +303,12 @@
- 
- static void __exit raw_exit(void)
- {
-+	int i;
-+
-+	for (i = 1; i < MAX_RAW_MINORS; i++)
-+		devfs_remove("raw/raw%d", i);
-+	devfs_remove("raw/rawctl");
-+	devfs_remove("raw");
- 	class_device_destroy(raw_class, MKDEV(RAW_MAJOR, 0));
- 	class_destroy(raw_class);
- 	cdev_del(&raw_cdev);
-diff -urN linux-2.6.19.old/drivers/char/riscom8.c linux-2.6.19.dev/drivers/char/riscom8.c
---- linux-2.6.19.old/drivers/char/riscom8.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/riscom8.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1613,6 +1613,7 @@
- 	memset(IRQ_to_board, 0, sizeof(IRQ_to_board));
- 	riscom_driver->owner = THIS_MODULE;
- 	riscom_driver->name = "ttyL";
-+	riscom_driver->devfs_name = "tts/L";
- 	riscom_driver->major = RISCOM8_NORMAL_MAJOR;
- 	riscom_driver->type = TTY_DRIVER_TYPE_SERIAL;
- 	riscom_driver->subtype = SERIAL_TYPE_NORMAL;
-diff -urN linux-2.6.19.old/drivers/char/rocket.c linux-2.6.19.dev/drivers/char/rocket.c
---- linux-2.6.19.old/drivers/char/rocket.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/rocket.c	2006-12-14 03:12:59.000000000 +0100
-@@ -2426,7 +2426,8 @@
- 	 */
- 
- 	rocket_driver->owner = THIS_MODULE;
--	rocket_driver->flags = TTY_DRIVER_DYNAMIC_DEV;
-+	rocket_driver->flags = TTY_DRIVER_NO_DEVFS;
-+	rocket_driver->devfs_name = "tts/R";
- 	rocket_driver->name = "ttyR";
- 	rocket_driver->driver_name = "Comtrol RocketPort";
- 	rocket_driver->major = TTY_ROCKET_MAJOR;
-@@ -2437,7 +2438,7 @@
- 	rocket_driver->init_termios.c_cflag =
- 	    B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- #ifdef ROCKET_SOFT_FLOW
--	rocket_driver->flags |= TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-+	rocket_driver->flags |= TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
- #endif
- 	tty_set_operations(rocket_driver, &rocket_ops);
- 
-diff -urN linux-2.6.19.old/drivers/char/serial167.c linux-2.6.19.dev/drivers/char/serial167.c
---- linux-2.6.19.old/drivers/char/serial167.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/serial167.c	2006-12-14 03:12:59.000000000 +0100
-@@ -2218,6 +2218,7 @@
-     /* Initialize the tty_driver structure */
-     
-     cy_serial_driver->owner = THIS_MODULE;
-+    cy_serial_driver->devfs_name = "tts/";
-     cy_serial_driver->name = "ttyS";
-     cy_serial_driver->major = TTY_MAJOR;
-     cy_serial_driver->minor_start = 64;
-diff -urN linux-2.6.19.old/drivers/char/stallion.c linux-2.6.19.dev/drivers/char/stallion.c
---- linux-2.6.19.old/drivers/char/stallion.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/stallion.c	2006-12-14 03:12:59.000000000 +0100
-@@ -39,6 +39,7 @@
- #include <linux/ioport.h>
- #include <linux/init.h>
- #include <linux/smp_lock.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/device.h>
- #include <linux/delay.h>
- 
-@@ -753,15 +754,21 @@
- 	if (i) {
- 		printk("STALLION: failed to un-register tty driver, "
- 			"errno=%d\n", -i);
-+		restore_flags(flags);
- 		return;
- 	}
--	for (i = 0; i < 4; i++)
-+	for (i = 0; i < 4; i++) {
-+		devfs_remove("staliomem/%d", i);
- 		class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
-+	}
-+	devfs_remove("staliomem");
- 	if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
- 		printk("STALLION: failed to un-register serial memory device, "
- 			"errno=%d\n", -i);
- 	class_destroy(stallion_class);
- 
-+	kfree(stl_tmpwritebuf);
-+
- 	for (i = 0; (i < stl_nrbrds); i++) {
- 		if ((brdp = stl_brds[i]) == (stlbrd_t *) NULL)
- 			continue;
-@@ -3033,21 +3040,35 @@
- 		return -1;
- 
- /*
-+ *	Allocate a temporary write buffer.
-+ */
-+	stl_tmpwritebuf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
-+	if (!stl_tmpwritebuf)
-+		printk("STALLION: failed to allocate memory (size=%d)\n",
-+			STL_TXBUFSIZE);
-+
-+/*
-  *	Set up a character driver for per board stuff. This is mainly used
-  *	to do stats ioctls on the ports.
-  */
- 	if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
- 		printk("STALLION: failed to register serial board device\n");
-+	devfs_mk_dir("staliomem");
- 
- 	stallion_class = class_create(THIS_MODULE, "staliomem");
--	for (i = 0; i < 4; i++)
-+	for (i = 0; i < 4; i++) {
-+		devfs_mk_cdev(MKDEV(STL_SIOMEMMAJOR, i),
-+				S_IFCHR|S_IRUSR|S_IWUSR,
-+				"staliomem/%d", i);
- 		class_device_create(stallion_class, NULL,
- 				    MKDEV(STL_SIOMEMMAJOR, i), NULL,
- 				    "staliomem%d", i);
-+	}
- 
- 	stl_serial->owner = THIS_MODULE;
- 	stl_serial->driver_name = stl_drvname;
- 	stl_serial->name = "ttyE";
-+	stl_serial->devfs_name = "tts/E";
- 	stl_serial->major = STL_SERIALMAJOR;
- 	stl_serial->minor_start = 0;
- 	stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
-diff -urN linux-2.6.19.old/drivers/char/tipar.c linux-2.6.19.dev/drivers/char/tipar.c
---- linux-2.6.19.old/drivers/char/tipar.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/tipar.c	2006-12-14 03:12:59.000000000 +0100
-@@ -55,6 +55,7 @@
- #include <linux/ioport.h>
- #include <asm/io.h>
- #include <linux/bitops.h>
-+#include <linux/devfs_fs_kernel.h>	/* DevFs support */
- #include <linux/parport.h>		/* Our code depend on parport */
- #include <linux/device.h>
- 
-@@ -443,6 +444,12 @@
- 
- 	class_device_create(tipar_class, NULL, MKDEV(TIPAR_MAJOR,
- 			TIPAR_MINOR + nr), NULL, "par%d", nr);
-+	/* Use devfs, tree: /dev/ticables/par/[0..2] */
-+	err = devfs_mk_cdev(MKDEV(TIPAR_MAJOR, TIPAR_MINOR + nr),
-+			S_IFCHR | S_IRUGO | S_IWUGO,
-+			"ticables/par/%d", nr);
-+	if (err)
-+		goto out_class;
- 
- 	/* Display informations */
- 	pr_info("tipar%d: using %s (%s)\n", nr, port->name, (port->irq ==
-@@ -497,6 +504,9 @@
- 		goto out;
- 	}
- 
-+	/* Use devfs with tree: /dev/ticables/par/[0..2] */
-+	devfs_mk_dir("ticables/par");
-+
- 	tipar_class = class_create(THIS_MODULE, "ticables");
- 	if (IS_ERR(tipar_class)) {
- 		err = PTR_ERR(tipar_class);
-@@ -515,6 +525,7 @@
- 	class_destroy(tipar_class);
- 
- out_chrdev:
-+	devfs_remove("ticables/par");
- 	unregister_chrdev(TIPAR_MAJOR, "tipar");
- out:
- 	return err;	
-@@ -535,8 +546,10 @@
- 			continue;
- 		parport_unregister_device(table[i].dev);
- 		class_device_destroy(tipar_class, MKDEV(TIPAR_MAJOR, i));
-+		devfs_remove("ticables/par/%d", i);
- 	}
- 	class_destroy(tipar_class);
-+	devfs_remove("ticables/par");
- 
- 	pr_info("tipar: module unloaded\n");
- }
-diff -urN linux-2.6.19.old/drivers/char/tty_io.c linux-2.6.19.dev/drivers/char/tty_io.c
---- linux-2.6.19.old/drivers/char/tty_io.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/tty_io.c	2006-12-14 03:12:59.000000000 +0100
-@@ -101,6 +101,7 @@
- #include <linux/kbd_kern.h>
- #include <linux/vt_kern.h>
- #include <linux/selection.h>
-+#include <linux/devfs_fs_kernel.h>
- 
- #include <linux/kmod.h>
- 
-@@ -3634,6 +3635,9 @@
- 		return ERR_PTR(-EINVAL);
- 	}
- 
-+	devfs_mk_cdev(dev, S_IFCHR | S_IRUSR | S_IWUSR,
-+			"%s%d", driver->devfs_name, index + driver->name_base);
-+
- 	if (driver->type == TTY_DRIVER_TYPE_PTY)
- 		pty_line_name(driver, index, name);
- 	else
-@@ -3655,6 +3659,7 @@
- 
- void tty_unregister_device(struct tty_driver *driver, unsigned index)
- {
-+	devfs_remove("%s%d", driver->devfs_name, index + driver->name_base);
- 	class_device_destroy(tty_class, MKDEV(driver->major, driver->minor_start) + index);
- }
- 
-@@ -3776,7 +3781,7 @@
- 	
- 	list_add(&driver->tty_drivers, &tty_drivers);
- 	
--	if ( !(driver->flags & TTY_DRIVER_DYNAMIC_DEV) ) {
-+	if ( !(driver->flags & TTY_DRIVER_NO_DEVFS) ) {
- 		for(i = 0; i < driver->num; i++)
- 		    tty_register_device(driver, i, NULL);
- 	}
-@@ -3819,7 +3824,7 @@
- 			driver->termios_locked[i] = NULL;
- 			kfree(tp);
- 		}
--		if (!(driver->flags & TTY_DRIVER_DYNAMIC_DEV))
-+		if (!(driver->flags & TTY_DRIVER_NO_DEVFS))
- 			tty_unregister_device(driver, i);
- 	}
- 	p = driver->ttys;
-@@ -3895,12 +3900,14 @@
- 	if (cdev_add(&tty_cdev, MKDEV(TTYAUX_MAJOR, 0), 1) ||
- 	    register_chrdev_region(MKDEV(TTYAUX_MAJOR, 0), 1, "/dev/tty") < 0)
- 		panic("Couldn't register /dev/tty driver\n");
-+	devfs_mk_cdev(MKDEV(TTYAUX_MAJOR, 0), S_IFCHR|S_IRUGO|S_IWUGO, "tty");
- 	class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 0), NULL, "tty");
- 
- 	cdev_init(&console_cdev, &console_fops);
- 	if (cdev_add(&console_cdev, MKDEV(TTYAUX_MAJOR, 1), 1) ||
- 	    register_chrdev_region(MKDEV(TTYAUX_MAJOR, 1), 1, "/dev/console") < 0)
- 		panic("Couldn't register /dev/console driver\n");
-+	devfs_mk_cdev(MKDEV(TTYAUX_MAJOR, 1), S_IFCHR|S_IRUSR|S_IWUSR, "console");
- 	class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 1), NULL, "console");
- 
- #ifdef CONFIG_UNIX98_PTYS
-@@ -3908,6 +3915,7 @@
- 	if (cdev_add(&ptmx_cdev, MKDEV(TTYAUX_MAJOR, 2), 1) ||
- 	    register_chrdev_region(MKDEV(TTYAUX_MAJOR, 2), 1, "/dev/ptmx") < 0)
- 		panic("Couldn't register /dev/ptmx driver\n");
-+	devfs_mk_cdev(MKDEV(TTYAUX_MAJOR, 2), S_IFCHR|S_IRUGO|S_IWUGO, "ptmx");
- 	class_device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 2), NULL, "ptmx");
- #endif
- 
-@@ -3916,6 +3924,7 @@
- 	if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
- 	    register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
- 		panic("Couldn't register /dev/tty0 driver\n");
-+	devfs_mk_cdev(MKDEV(TTY_MAJOR, 0), S_IFCHR|S_IRUSR|S_IWUSR, "vc/0");
- 	class_device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
- 
- 	vty_init();
-diff -urN linux-2.6.19.old/drivers/char/vc_screen.c linux-2.6.19.dev/drivers/char/vc_screen.c
---- linux-2.6.19.old/drivers/char/vc_screen.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/vc_screen.c	2006-12-14 03:12:59.000000000 +0100
-@@ -25,6 +25,7 @@
- #include <linux/major.h>
- #include <linux/errno.h>
- #include <linux/tty.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/sched.h>
- #include <linux/interrupt.h>
- #include <linux/mm.h>
-@@ -476,6 +477,12 @@
- 
- void vcs_make_sysfs(struct tty_struct *tty)
- {
-+	devfs_mk_cdev(MKDEV(VCS_MAJOR, tty->index + 1),
-+			S_IFCHR|S_IRUSR|S_IWUSR,
-+			"vcc/%u", tty->index + 1);
-+	devfs_mk_cdev(MKDEV(VCS_MAJOR, tty->index + 129),
-+			S_IFCHR|S_IRUSR|S_IWUSR,
-+			"vcc/a%u", tty->index + 1);
- 	class_device_create(vc_class, NULL, MKDEV(VCS_MAJOR, tty->index + 1),
- 			NULL, "vcs%u", tty->index + 1);
- 	class_device_create(vc_class, NULL, MKDEV(VCS_MAJOR, tty->index + 129),
-@@ -484,6 +491,8 @@
- 
- void vcs_remove_sysfs(struct tty_struct *tty)
- {
-+	devfs_remove("vcc/%u", tty->index + 1);
-+	devfs_remove("vcc/a%u", tty->index + 1);
- 	class_device_destroy(vc_class, MKDEV(VCS_MAJOR, tty->index + 1));
- 	class_device_destroy(vc_class, MKDEV(VCS_MAJOR, tty->index + 129));
- }
-@@ -494,6 +503,8 @@
- 		panic("unable to get major %d for vcs device", VCS_MAJOR);
- 	vc_class = class_create(THIS_MODULE, "vc");
- 
-+	devfs_mk_cdev(MKDEV(VCS_MAJOR, 0), S_IFCHR|S_IRUSR|S_IWUSR, "vcc/0");
-+	devfs_mk_cdev(MKDEV(VCS_MAJOR, 128), S_IFCHR|S_IRUSR|S_IWUSR, "vcc/a0");
- 	class_device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 0), NULL, "vcs");
- 	class_device_create(vc_class, NULL, MKDEV(VCS_MAJOR, 128), NULL, "vcsa");
- 	return 0;
-diff -urN linux-2.6.19.old/drivers/char/viocons.c linux-2.6.19.dev/drivers/char/viocons.c
---- linux-2.6.19.old/drivers/char/viocons.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/viocons.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1121,6 +1121,7 @@
- 	viotty_driver = alloc_tty_driver(VTTY_PORTS);
- 	viotty_driver->owner = THIS_MODULE;
- 	viotty_driver->driver_name = "vioconsole";
-+	viotty_driver->devfs_name = "vcs/";
- 	viotty_driver->name = "tty";
- 	viotty_driver->name_base = 1;
- 	viotty_driver->major = TTY_MAJOR;
-diff -urN linux-2.6.19.old/drivers/char/viotape.c linux-2.6.19.dev/drivers/char/viotape.c
---- linux-2.6.19.old/drivers/char/viotape.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/viotape.c	2006-12-14 03:12:59.000000000 +0100
-@@ -42,6 +42,7 @@
- #include <linux/dma-mapping.h>
- #include <linux/fs.h>
- #include <linux/cdev.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/major.h>
- #include <linux/completion.h>
- #include <linux/proc_fs.h>
-@@ -942,6 +943,7 @@
- {
- 	int i = vdev->unit_address;
- 	int j;
-+	char tapename[16];
- 
- 	if (i >= viotape_numdev)
- 		return -ENODEV;
-@@ -955,6 +957,12 @@
- 			"iseries!vt%d", i);
- 	class_device_create(tape_class, NULL, MKDEV(VIOTAPE_MAJOR, i | 0x80),
- 			NULL, "iseries!nvt%d", i);
-+	devfs_mk_cdev(MKDEV(VIOTAPE_MAJOR, i), S_IFCHR | S_IRUSR | S_IWUSR,
-+			"iseries/vt%d", i);
-+	devfs_mk_cdev(MKDEV(VIOTAPE_MAJOR, i | 0x80),
-+			S_IFCHR | S_IRUSR | S_IWUSR, "iseries/nvt%d", i);
-+  	sprintf(tapename, "iseries/vt%d", i);
-+	state[i].dev_handle = devfs_register_tape(tapename);
- 	printk(VIOTAPE_KERN_INFO "tape iseries/vt%d is iSeries "
- 			"resource %10.10s type %4.4s, model %3.3s\n",
- 			i, viotape_unitinfo[i].rsrcname,
-@@ -966,6 +974,9 @@
- {
- 	int i = vdev->unit_address;
- 
-+	devfs_remove("iseries/nvt%d", i);
-+	devfs_remove("iseries/vt%d", i);
-+	devfs_unregister_tape(state[i].dev_handle);
- 	class_device_destroy(tape_class, MKDEV(VIOTAPE_MAJOR, i | 0x80));
- 	class_device_destroy(tape_class, MKDEV(VIOTAPE_MAJOR, i));
- 	return 0;
-diff -urN linux-2.6.19.old/drivers/char/vme_scc.c linux-2.6.19.dev/drivers/char/vme_scc.c
---- linux-2.6.19.old/drivers/char/vme_scc.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/vme_scc.c	2006-12-14 03:12:59.000000000 +0100
-@@ -146,6 +146,7 @@
- 	scc_driver->owner = THIS_MODULE;
- 	scc_driver->driver_name = "scc";
- 	scc_driver->name = "ttyS";
-+	scc_driver->devfs_name = "tts/";
- 	scc_driver->major = TTY_MAJOR;
- 	scc_driver->minor_start = SCC_MINOR_BASE;
- 	scc_driver->type = TTY_DRIVER_TYPE_SERIAL;
-diff -urN linux-2.6.19.old/drivers/char/vt.c linux-2.6.19.dev/drivers/char/vt.c
---- linux-2.6.19.old/drivers/char/vt.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/char/vt.c	2006-12-14 03:12:59.000000000 +0100
-@@ -86,6 +86,7 @@
- #include <linux/mm.h>
- #include <linux/console.h>
- #include <linux/init.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/vt_kern.h>
- #include <linux/selection.h>
- #include <linux/tiocl.h>
-@@ -2691,6 +2692,7 @@
- 	if (!console_driver)
- 		panic("Couldn't allocate console driver\n");
- 	console_driver->owner = THIS_MODULE;
-+	console_driver->devfs_name = "vc/";
- 	console_driver->name = "tty";
- 	console_driver->name_base = 1;
- 	console_driver->major = TTY_MAJOR;
-diff -urN linux-2.6.19.old/drivers/ide/ide.c linux-2.6.19.dev/drivers/ide/ide.c
---- linux-2.6.19.old/drivers/ide/ide.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/ide/ide.c	2006-12-14 03:12:59.000000000 +0100
-@@ -146,6 +146,7 @@
- #include <linux/pci.h>
- #include <linux/delay.h>
- #include <linux/ide.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/completion.h>
- #include <linux/reboot.h>
- #include <linux/cdrom.h>
-@@ -591,8 +592,13 @@
- 		goto abort;
- 	for (unit = 0; unit < MAX_DRIVES; ++unit) {
- 		drive = &hwif->drives[unit];
--		if (!drive->present)
-+		if (!drive->present) {
-+			if (drive->devfs_name[0] != '\0') {
-+				devfs_remove(drive->devfs_name);
-+				drive->devfs_name[0] = '\0';
-+			}
- 			continue;
-+		}
- 		spin_unlock_irq(&ide_lock);
- 		device_unregister(&drive->gendev);
- 		wait_for_completion(&drive->gendev_rel_comp);
-@@ -2005,6 +2011,7 @@
- 	int ret;
- 
- 	printk(KERN_INFO "Uniform Multi-Platform E-IDE driver " REVISION "\n");
-+	devfs_mk_dir("ide");
- 	system_bus_speed = ide_system_bus_speed();
- 
- 	ret = bus_register(&ide_bus_type);
-@@ -2086,6 +2093,7 @@
- #ifdef CONFIG_PROC_FS
- 	proc_ide_destroy();
- #endif
-+	devfs_remove("ide");
- 
- 	bus_unregister(&ide_bus_type);
- }
-diff -urN linux-2.6.19.old/drivers/ide/ide-cd.c linux-2.6.19.dev/drivers/ide/ide-cd.c
---- linux-2.6.19.old/drivers/ide/ide-cd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/ide/ide-cd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -3528,6 +3528,8 @@
- 	drive->driver_data = info;
- 
- 	g->minors = 1;
-+	snprintf(g->devfs_name, sizeof(g->devfs_name),
-+			"%s/cd", drive->devfs_name);
- 	g->driverfs_dev = &drive->gendev;
- 	g->flags = GENHD_FL_CD | GENHD_FL_REMOVABLE;
- 	if (ide_cdrom_setup(drive)) {
-diff -urN linux-2.6.19.old/drivers/ide/ide-disk.c linux-2.6.19.dev/drivers/ide/ide-disk.c
---- linux-2.6.19.old/drivers/ide/ide-disk.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/ide/ide-disk.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1018,6 +1018,7 @@
- 	struct gendisk *g = idkp->disk;
- 
- 	drive->driver_data = NULL;
-+	drive->devfs_name[0] = '\0';
- 	g->private_data = NULL;
- 	put_disk(g);
- 	kfree(idkp);
-@@ -1221,6 +1222,7 @@
- 		drive->attach = 1;
- 
- 	g->minors = 1 << PARTN_BITS;
-+	strcpy(g->devfs_name, drive->devfs_name);
- 	g->driverfs_dev = &drive->gendev;
- 	g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
- 	set_capacity(g, idedisk_capacity(drive));
-diff -urN linux-2.6.19.old/drivers/ide/ide-floppy.c linux-2.6.19.dev/drivers/ide/ide-floppy.c
---- linux-2.6.19.old/drivers/ide/ide-floppy.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/ide/ide-floppy.c	2006-12-14 03:12:59.000000000 +0100
-@@ -2174,6 +2174,7 @@
- 
- 	g->minors = 1 << PARTN_BITS;
- 	g->driverfs_dev = &drive->gendev;
-+	strcpy(g->devfs_name, drive->devfs_name);
- 	g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0;
- 	g->fops = &idefloppy_ops;
- 	drive->attach = 1;
-diff -urN linux-2.6.19.old/drivers/ide/ide-probe.c linux-2.6.19.dev/drivers/ide/ide-probe.c
---- linux-2.6.19.old/drivers/ide/ide-probe.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/ide/ide-probe.c	2006-12-14 03:12:59.000000000 +0100
-@@ -46,6 +46,7 @@
- #include <linux/slab.h>
- #include <linux/delay.h>
- #include <linux/ide.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/spinlock.h>
- #include <linux/kmod.h>
- #include <linux/pci.h>
-@@ -1288,6 +1289,10 @@
- 	ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
- 
- 	spin_lock_irq(&ide_lock);
-+	if (drive->devfs_name[0] != '\0') {
-+		devfs_remove(drive->devfs_name);
-+		drive->devfs_name[0] = '\0';
-+	}
- 	ide_remove_drive_from_hwgroup(drive);
- 	kfree(drive->id);
- 	drive->id = NULL;
-@@ -1321,6 +1326,12 @@
- 		drive->gendev.bus = &ide_bus_type;
- 		drive->gendev.driver_data = drive;
- 		drive->gendev.release = drive_release_dev;
-+		if (drive->present) {
-+			sprintf(drive->devfs_name, "ide/host%d/bus%d/target%d/lun%d",
-+				(hwif->channel && hwif->mate) ?
-+				hwif->mate->index : hwif->index,
-+				hwif->channel, unit, drive->lun);
-+		}
- 	}
- 	blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
- 			THIS_MODULE, ata_probe, ata_lock, hwif);
-diff -urN linux-2.6.19.old/drivers/ide/ide-tape.c linux-2.6.19.dev/drivers/ide/ide-tape.c
---- linux-2.6.19.old/drivers/ide/ide-tape.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/ide/ide-tape.c	2006-12-14 03:12:59.000000000 +0100
-@@ -434,6 +434,7 @@
- #include <linux/interrupt.h>
- #include <linux/jiffies.h>
- #include <linux/major.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/errno.h>
- #include <linux/genhd.h>
- #include <linux/slab.h>
-@@ -4724,6 +4725,9 @@
- 			MKDEV(IDETAPE_MAJOR, tape->minor));
- 	class_device_destroy(idetape_sysfs_class,
- 			MKDEV(IDETAPE_MAJOR, tape->minor + 128));
-+	devfs_remove("%s/mt", drive->devfs_name);
-+	devfs_remove("%s/mtn", drive->devfs_name);
-+	devfs_unregister_tape(g->number);
- 	idetape_devs[tape->minor] = NULL;
- 	g->private_data = NULL;
- 	put_disk(g);
-@@ -4897,6 +4901,14 @@
- 	class_device_create(idetape_sysfs_class, NULL,
- 			MKDEV(IDETAPE_MAJOR, minor + 128), &drive->gendev, "n%s", tape->name);
- 
-+	devfs_mk_cdev(MKDEV(HWIF(drive)->major, minor),
-+			S_IFCHR | S_IRUGO | S_IWUGO,
-+			"%s/mt", drive->devfs_name);
-+	devfs_mk_cdev(MKDEV(HWIF(drive)->major, minor + 128),
-+			S_IFCHR | S_IRUGO | S_IWUGO,
-+			"%s/mtn", drive->devfs_name);
-+
-+	g->number = devfs_register_tape(drive->devfs_name);
- 	g->fops = &idetape_block_ops;
- 	ide_register_region(g);
- 
-diff -urN linux-2.6.19.old/drivers/ieee1394/dv1394.c linux-2.6.19.dev/drivers/ieee1394/dv1394.c
---- linux-2.6.19.old/drivers/ieee1394/dv1394.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/ieee1394/dv1394.c	2006-12-14 03:12:59.000000000 +0100
-@@ -2263,14 +2263,37 @@
- 	list_add_tail(&video->list, &dv1394_cards);
- 	spin_unlock_irqrestore(&dv1394_cards_lock, flags);
- 
-+	if (devfs_mk_cdev(MKDEV(IEEE1394_MAJOR,
-+				IEEE1394_MINOR_BLOCK_DV1394*16 + video->id),
-+			S_IFCHR|S_IRUGO|S_IWUGO,
-+			 "ieee1394/dv/host%d/%s/%s",
-+			 (video->id>>2),
-+			 (video->pal_or_ntsc == DV1394_NTSC ? "NTSC" : "PAL"),
-+			 (video->mode == MODE_RECEIVE ? "in" : "out")) < 0)
-+			goto err_free;
-+
- 	debug_printk("dv1394: dv1394_init() OK on ID %d\n", video->id);
-+
- 	return 0;
-+
-+ err_free:
-+	kfree(video);
-+ err:
-+	return -1;
- }
- 
- static void dv1394_un_init(struct video_card *video)
- {
-+	char buf[32];
-+
- 	/* obviously nobody has the driver open at this point */
- 	do_dv1394_shutdown(video, 1);
-+	snprintf(buf, sizeof(buf), "dv/host%d/%s/%s", (video->id >> 2),
-+		(video->pal_or_ntsc == DV1394_NTSC ? "NTSC" : "PAL"),
-+		(video->mode == MODE_RECEIVE ? "in" : "out")
-+		);
-+
-+	devfs_remove("ieee1394/%s", buf);
- 	kfree(video);
- }
- 
-@@ -2307,6 +2330,9 @@
- 
- 	class_device_destroy(hpsb_protocol_class,
- 		MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_DV1394 * 16 + (id<<2)));
-+	devfs_remove("ieee1394/dv/host%d/NTSC", id);
-+	devfs_remove("ieee1394/dv/host%d/PAL", id);
-+	devfs_remove("ieee1394/dv/host%d", id);
- }
- 
- static void dv1394_add_host (struct hpsb_host *host)
-@@ -2323,6 +2349,9 @@
- 	class_device_create(hpsb_protocol_class, NULL, MKDEV(
- 		IEEE1394_MAJOR,	IEEE1394_MINOR_BLOCK_DV1394 * 16 + (id<<2)), 
- 		NULL, "dv1394-%d", id);
-+	devfs_mk_dir("ieee1394/dv/host%d", id);
-+	devfs_mk_dir("ieee1394/dv/host%d/NTSC", id);
-+	devfs_mk_dir("ieee1394/dv/host%d/PAL", id);
- 
- 	dv1394_init(ohci, DV1394_NTSC, MODE_RECEIVE);
- 	dv1394_init(ohci, DV1394_NTSC, MODE_TRANSMIT);
-@@ -2579,8 +2608,10 @@
- static void __exit dv1394_exit_module(void)
- {
- 	hpsb_unregister_protocol(&dv1394_driver);
-+
- 	hpsb_unregister_highlevel(&dv1394_highlevel);
- 	cdev_del(&dv1394_cdev);
-+	devfs_remove("ieee1394/dv");
- }
- 
- static int __init dv1394_init_module(void)
-@@ -2596,12 +2627,15 @@
- 		return ret;
- 	}
- 
-+	devfs_mk_dir("ieee1394/dv");
-+
- 	hpsb_register_highlevel(&dv1394_highlevel);
- 
- 	ret = hpsb_register_protocol(&dv1394_driver);
- 	if (ret) {
- 		printk(KERN_ERR "dv1394: failed to register protocol\n");
- 		hpsb_unregister_highlevel(&dv1394_highlevel);
-+		devfs_remove("ieee1394/dv");
- 		cdev_del(&dv1394_cdev);
- 		return ret;
- 	}
-diff -urN linux-2.6.19.old/drivers/ieee1394/ieee1394_core.c linux-2.6.19.dev/drivers/ieee1394/ieee1394_core.c
---- linux-2.6.19.old/drivers/ieee1394/ieee1394_core.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/ieee1394/ieee1394_core.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1072,10 +1072,17 @@
- 		goto exit_release_kernel_thread;
- 	}
- 
-+	/* actually this is a non-fatal error */
-+	ret = devfs_mk_dir("ieee1394");
-+	if (ret < 0) {
-+		HPSB_ERR("unable to make devfs dir for device major %d!\n", IEEE1394_MAJOR);
-+		goto release_chrdev;
-+	}
-+
- 	ret = bus_register(&ieee1394_bus_type);
- 	if (ret < 0) {
- 		HPSB_INFO("bus register failed");
--		goto release_chrdev;
-+		goto release_devfs;
- 	}
- 
- 	for (i = 0; fw_bus_attrs[i]; i++) {
-@@ -1086,7 +1093,7 @@
- 						fw_bus_attrs[i--]);
- 			}
- 			bus_unregister(&ieee1394_bus_type);
--			goto release_chrdev;
-+			goto release_devfs;
- 		}
- 	}
- 
-@@ -1139,6 +1146,8 @@
- 	for (i = 0; fw_bus_attrs[i]; i++)
- 		bus_remove_file(&ieee1394_bus_type, fw_bus_attrs[i]);
- 	bus_unregister(&ieee1394_bus_type);
-+release_devfs:
-+	devfs_remove("ieee1394");
- release_chrdev:
- 	unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
- exit_release_kernel_thread:
-@@ -1168,6 +1177,7 @@
- 	hpsb_cleanup_config_roms();
- 
- 	unregister_chrdev_region(IEEE1394_CORE_DEV, 256);
-+	devfs_remove("ieee1394");
- }
- 
- fs_initcall(ieee1394_init); /* same as ohci1394 */
-diff -urN linux-2.6.19.old/drivers/ieee1394/ieee1394_core.h linux-2.6.19.dev/drivers/ieee1394/ieee1394_core.h
---- linux-2.6.19.old/drivers/ieee1394/ieee1394_core.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/ieee1394/ieee1394_core.h	2006-12-14 03:12:59.000000000 +0100
-@@ -6,6 +6,7 @@
- #include <linux/list.h>
- #include <linux/skbuff.h>
- #include <linux/types.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <asm/atomic.h>
- 
- #include "hosts.h"
-diff -urN linux-2.6.19.old/drivers/ieee1394/raw1394.c linux-2.6.19.dev/drivers/ieee1394/raw1394.c
---- linux-2.6.19.old/drivers/ieee1394/raw1394.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/ieee1394/raw1394.c	2006-12-14 03:12:59.000000000 +0100
-@@ -41,6 +41,7 @@
- #include <linux/cdev.h>
- #include <asm/uaccess.h>
- #include <asm/atomic.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/compat.h>
- 
- #include "csr1212.h"
-@@ -3017,6 +3018,9 @@
- 		goto out_unreg;
- 	}
- 
-+	devfs_mk_cdev(MKDEV(IEEE1394_MAJOR, IEEE1394_MINOR_BLOCK_RAW1394 * 16),
-+		      S_IFCHR | S_IRUSR | S_IWUSR, RAW1394_DEVICE_NAME);
-+
- 	cdev_init(&raw1394_cdev, &raw1394_fops);
- 	raw1394_cdev.owner = THIS_MODULE;
- 	kobject_set_name(&raw1394_cdev.kobj, RAW1394_DEVICE_NAME);
-@@ -3038,6 +3042,7 @@
- 	goto out;
- 
-       out_dev:
-+	devfs_remove(RAW1394_DEVICE_NAME);
- 	class_device_destroy(hpsb_protocol_class,
- 			     MKDEV(IEEE1394_MAJOR,
- 				   IEEE1394_MINOR_BLOCK_RAW1394 * 16));
-@@ -3053,6 +3058,7 @@
- 			     MKDEV(IEEE1394_MAJOR,
- 				   IEEE1394_MINOR_BLOCK_RAW1394 * 16));
- 	cdev_del(&raw1394_cdev);
-+	devfs_remove(RAW1394_DEVICE_NAME);
- 	hpsb_unregister_highlevel(&raw1394_highlevel);
- 	hpsb_unregister_protocol(&raw1394_driver);
- }
-diff -urN linux-2.6.19.old/drivers/ieee1394/video1394.c linux-2.6.19.dev/drivers/ieee1394/video1394.c
---- linux-2.6.19.old/drivers/ieee1394/video1394.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/ieee1394/video1394.c	2006-12-14 03:12:59.000000000 +0100
-@@ -41,6 +41,7 @@
- #include <linux/poll.h>
- #include <linux/smp_lock.h>
- #include <linux/delay.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/bitops.h>
- #include <linux/types.h>
- #include <linux/vmalloc.h>
-@@ -1356,6 +1357,9 @@
- 	class_device_create(hpsb_protocol_class, NULL, MKDEV(
- 		IEEE1394_MAJOR,	minor), 
- 		NULL, "%s-%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
-+	devfs_mk_cdev(MKDEV(IEEE1394_MAJOR, minor),
-+		       S_IFCHR | S_IRUSR | S_IWUSR,
-+		       "%s/%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
- }
- 
- 
-@@ -1363,9 +1367,12 @@
- {
- 	struct ti_ohci *ohci = hpsb_get_hostinfo(&video1394_highlevel, host);
- 
--	if (ohci)
-+	if (ohci) {
- 		class_device_destroy(hpsb_protocol_class, MKDEV(IEEE1394_MAJOR,
- 			IEEE1394_MINOR_BLOCK_VIDEO1394 * 16 + ohci->host->id));
-+		devfs_remove("%s/%d", VIDEO1394_DRIVER_NAME, ohci->host->id);
-+	}
-+	
- 	return;
- }
- 
-@@ -1506,8 +1513,12 @@
- static void __exit video1394_exit_module (void)
- {
- 	hpsb_unregister_protocol(&video1394_driver);
-+
- 	hpsb_unregister_highlevel(&video1394_highlevel);
-+
-+	devfs_remove(VIDEO1394_DRIVER_NAME);
- 	cdev_del(&video1394_cdev);
-+
- 	PRINT_G(KERN_INFO, "Removed " VIDEO1394_DRIVER_NAME " module");
- }
- 
-@@ -1524,12 +1535,15 @@
- 		return ret;
-         }
- 
-+	devfs_mk_dir(VIDEO1394_DRIVER_NAME);
-+
- 	hpsb_register_highlevel(&video1394_highlevel);
- 
- 	ret = hpsb_register_protocol(&video1394_driver);
- 	if (ret) {
- 		PRINT_G(KERN_ERR, "video1394: failed to register protocol");
- 		hpsb_unregister_highlevel(&video1394_highlevel);
-+		devfs_remove(VIDEO1394_DRIVER_NAME);
- 		cdev_del(&video1394_cdev);
- 		return ret;
- 	}
-diff -urN linux-2.6.19.old/drivers/input/serio/serio_raw.c linux-2.6.19.dev/drivers/input/serio/serio_raw.c
---- linux-2.6.19.old/drivers/input/serio/serio_raw.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/input/serio/serio_raw.c	2006-12-14 03:12:59.000000000 +0100
-@@ -16,6 +16,7 @@
- #include <linux/init.h>
- #include <linux/major.h>
- #include <linux/device.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/miscdevice.h>
- #include <linux/wait.h>
- #include <linux/mutex.h>
-diff -urN linux-2.6.19.old/drivers/isdn/capi/capi.c linux-2.6.19.dev/drivers/isdn/capi/capi.c
---- linux-2.6.19.old/drivers/isdn/capi/capi.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/isdn/capi/capi.c	2006-12-14 03:12:59.000000000 +0100
-@@ -38,6 +38,7 @@
- #include <linux/init.h>
- #include <linux/device.h>
- #include <linux/moduleparam.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/isdn/capiutil.h>
- #include <linux/isdn/capicmd.h>
- #if defined(CONFIG_ISDN_CAPI_CAPIFS) || defined(CONFIG_ISDN_CAPI_CAPIFS_MODULE)
-@@ -1335,6 +1336,7 @@
- 
- 	drv->owner = THIS_MODULE;
- 	drv->driver_name = "capi_nc";
-+	drv->devfs_name = "capi/";
- 	drv->name = "capi";
- 	drv->major = capi_ttymajor;
- 	drv->minor_start = 0;
-@@ -1513,6 +1515,8 @@
- 	}
- 
- 	class_device_create(capi_class, NULL, MKDEV(capi_major, 0), NULL, "capi");
-+	devfs_mk_cdev(MKDEV(capi_major, 0), S_IFCHR | S_IRUSR | S_IWUSR,
-+			"isdn/capi20");
- 
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- 	if (capinc_tty_init() < 0) {
-@@ -1547,6 +1551,7 @@
- 	class_device_destroy(capi_class, MKDEV(capi_major, 0));
- 	class_destroy(capi_class);
- 	unregister_chrdev(capi_major, "capi20");
-+	devfs_remove("isdn/capi20");
- 
- #ifdef CONFIG_ISDN_CAPI_MIDDLEWARE
- 	capinc_tty_exit();
-diff -urN linux-2.6.19.old/drivers/isdn/gigaset/bas-gigaset.c linux-2.6.19.dev/drivers/isdn/gigaset/bas-gigaset.c
---- linux-2.6.19.old/drivers/isdn/gigaset/bas-gigaset.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/isdn/gigaset/bas-gigaset.c	2006-12-14 03:12:59.000000000 +0100
-@@ -41,6 +41,7 @@
- #define GIGASET_MINORS     1
- #define GIGASET_MINOR      16
- #define GIGASET_MODULENAME "bas_gigaset"
-+#define GIGASET_DEVFSNAME  "gig/bas/"
- #define GIGASET_DEVNAME    "ttyGB"
- 
- /* length limit according to Siemens 3070usb-protokoll.doc ch. 2.1 */
-@@ -2348,7 +2349,8 @@
- 	/* allocate memory for our driver state and intialize it */
- 	if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
- 				       GIGASET_MODULENAME, GIGASET_DEVNAME,
--				       &gigops, THIS_MODULE)) == NULL)
-+				       GIGASET_DEVFSNAME, &gigops,
-+				       THIS_MODULE)) == NULL)
- 		goto error;
- 
- 	/* allocate memory for our device state and intialize it */
-diff -urN linux-2.6.19.old/drivers/isdn/gigaset/common.c linux-2.6.19.dev/drivers/isdn/gigaset/common.c
---- linux-2.6.19.old/drivers/isdn/gigaset/common.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/isdn/gigaset/common.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1092,12 +1092,14 @@
-  *	minors		Number of minors this driver can handle
-  *	procname	Name of the driver
-  *	devname		Name of the device files (prefix without minor number)
-+ *	devfsname	Devfs name of the device files without %d
-  * return value:
-  *	Pointer to the gigaset_driver structure on success, NULL on failure.
-  */
- struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
- 					  const char *procname,
- 					  const char *devname,
-+					  const char *devfsname,
- 					  const struct gigaset_ops *ops,
- 					  struct module *owner)
- {
-@@ -1137,7 +1139,7 @@
- 		drv->cs[i].minor_index = i;
- 	}
- 
--	gigaset_if_initdriver(drv, procname, devname);
-+	gigaset_if_initdriver(drv, procname, devname, devfsname);
- 
- 	spin_lock_irqsave(&driver_lock, flags);
- 	list_add(&drv->list, &drivers);
-diff -urN linux-2.6.19.old/drivers/isdn/gigaset/gigaset.h linux-2.6.19.dev/drivers/isdn/gigaset/gigaset.h
---- linux-2.6.19.old/drivers/isdn/gigaset/gigaset.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/isdn/gigaset/gigaset.h	2006-12-14 03:12:59.000000000 +0100
-@@ -768,6 +768,7 @@
- struct gigaset_driver *gigaset_initdriver(unsigned minor, unsigned minors,
- 					  const char *procname,
- 					  const char *devname,
-+					  const char *devfsname,
- 					  const struct gigaset_ops *ops,
- 					  struct module *owner);
- 
-@@ -890,7 +891,7 @@
- 
- /* initialize interface */
- void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
--			   const char *devname);
-+			   const char *devname, const char *devfsname);
- /* release interface */
- void gigaset_if_freedriver(struct gigaset_driver *drv);
- /* add minor */
-diff -urN linux-2.6.19.old/drivers/isdn/gigaset/interface.c linux-2.6.19.dev/drivers/isdn/gigaset/interface.c
---- linux-2.6.19.old/drivers/isdn/gigaset/interface.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/isdn/gigaset/interface.c	2006-12-14 03:12:59.000000000 +0100
-@@ -673,9 +673,10 @@
-  *	drv		Driver
-  *	procname	Name of the driver (e.g. for /proc/tty/drivers)
-  *	devname		Name of the device files (prefix without minor number)
-+ *	devfsname	Devfs name of the device files without %d
-  */
- void gigaset_if_initdriver(struct gigaset_driver *drv, const char *procname,
--			   const char *devname)
-+			   const char *devname, const char *devfsname)
- {
- 	unsigned minors = drv->minors;
- 	int ret;
-@@ -691,7 +692,7 @@
- 	tty->major =		GIG_MAJOR,
- 	tty->type =		TTY_DRIVER_TYPE_SERIAL,
- 	tty->subtype =		SERIAL_TYPE_NORMAL,
--	tty->flags =		TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-+	tty->flags =		TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS,
- 
- 	tty->driver_name =	procname;
- 	tty->name =		devname;
-@@ -699,6 +700,7 @@
- 	tty->num =		drv->minors;
- 
- 	tty->owner =		THIS_MODULE;
-+	tty->devfs_name =	devfsname;
- 
- 	tty->init_termios          = tty_std_termios; //FIXME
- 	tty->init_termios.c_cflag  = B9600 | CS8 | CREAD | HUPCL | CLOCAL; //FIXME
-diff -urN linux-2.6.19.old/drivers/isdn/gigaset/usb-gigaset.c linux-2.6.19.dev/drivers/isdn/gigaset/usb-gigaset.c
---- linux-2.6.19.old/drivers/isdn/gigaset/usb-gigaset.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/isdn/gigaset/usb-gigaset.c	2006-12-14 03:12:59.000000000 +0100
-@@ -41,6 +41,7 @@
- #define GIGASET_MINORS     1
- #define GIGASET_MINOR      8
- #define GIGASET_MODULENAME "usb_gigaset"
-+#define GIGASET_DEVFSNAME  "gig/usb/"
- #define GIGASET_DEVNAME    "ttyGU"
- 
- #define IF_WRITEBUF 2000 //FIXME  // WAKEUP_CHARS: 256
-@@ -895,7 +896,8 @@
- 	/* allocate memory for our driver state and intialize it */
- 	if ((driver = gigaset_initdriver(GIGASET_MINOR, GIGASET_MINORS,
- 				       GIGASET_MODULENAME, GIGASET_DEVNAME,
--				       &ops, THIS_MODULE)) == NULL)
-+				       GIGASET_DEVFSNAME, &ops,
-+				       THIS_MODULE)) == NULL)
- 		goto error;
- 
- 	/* allocate memory for our device state and intialize it */
-diff -urN linux-2.6.19.old/drivers/isdn/hardware/eicon/divamnt.c linux-2.6.19.dev/drivers/isdn/hardware/eicon/divamnt.c
---- linux-2.6.19.old/drivers/isdn/hardware/eicon/divamnt.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/isdn/hardware/eicon/divamnt.c	2006-12-14 03:12:59.000000000 +0100
-@@ -10,12 +10,14 @@
-  * of the GNU General Public License, incorporated herein by reference.
-  */
- 
-+#include <linux/config.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
- #include <linux/smp_lock.h>
- #include <linux/poll.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <asm/uaccess.h>
- 
- #include "platform.h"
-@@ -176,6 +178,7 @@
- 
- static void divas_maint_unregister_chrdev(void)
- {
-+	devfs_remove(DEVNAME);
- 	unregister_chrdev(major, DEVNAME);
- }
- 
-@@ -187,6 +190,7 @@
- 		       DRIVERLNAME);
- 		return (0);
- 	}
-+	devfs_mk_cdev(MKDEV(major, 0), S_IFCHR|S_IRUSR|S_IWUSR, DEVNAME);
- 
- 	return (1);
- }
-diff -urN linux-2.6.19.old/drivers/isdn/hardware/eicon/divasi.c linux-2.6.19.dev/drivers/isdn/hardware/eicon/divasi.c
---- linux-2.6.19.old/drivers/isdn/hardware/eicon/divasi.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/isdn/hardware/eicon/divasi.c	2006-12-14 03:12:59.000000000 +0100
-@@ -18,6 +18,7 @@
- #include <linux/poll.h>
- #include <linux/proc_fs.h>
- #include <linux/skbuff.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <asm/uaccess.h>
- 
- #include "platform.h"
-@@ -143,6 +144,7 @@
- 
- static void divas_idi_unregister_chrdev(void)
- {
-+	devfs_remove(DEVNAME);
- 	unregister_chrdev(major, DEVNAME);
- }
- 
-@@ -154,6 +156,7 @@
- 		       DRIVERLNAME);
- 		return (0);
- 	}
-+	devfs_mk_cdev(MKDEV(major, 0), S_IFCHR|S_IRUSR|S_IWUSR, DEVNAME);
- 
- 	return (1);
- }
-diff -urN linux-2.6.19.old/drivers/isdn/hardware/eicon/divasmain.c linux-2.6.19.dev/drivers/isdn/hardware/eicon/divasmain.c
---- linux-2.6.19.old/drivers/isdn/hardware/eicon/divasmain.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/isdn/hardware/eicon/divasmain.c	2006-12-14 03:12:59.000000000 +0100
-@@ -9,10 +9,12 @@
-  * of the GNU General Public License, incorporated herein by reference.
-  */
- 
-+#include <linux/config.h>
- #include <linux/module.h>
- #include <linux/init.h>
- #include <linux/kernel.h>
- #include <linux/sched.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <asm/uaccess.h>
- #include <asm/io.h>
- #include <linux/ioport.h>
-@@ -675,6 +677,7 @@
- 
- static void divas_unregister_chrdev(void)
- {
-+	devfs_remove(DEVNAME);
- 	unregister_chrdev(major, DEVNAME);
- }
- 
-@@ -686,6 +689,7 @@
- 		       DRIVERLNAME);
- 		return (0);
- 	}
-+	devfs_mk_cdev(MKDEV(major, 0), S_IFCHR|S_IRUSR|S_IWUSR, DEVNAME);
- 
- 	return (1);
- }
-diff -urN linux-2.6.19.old/drivers/isdn/i4l/isdn_tty.c linux-2.6.19.dev/drivers/isdn/i4l/isdn_tty.c
---- linux-2.6.19.old/drivers/isdn/i4l/isdn_tty.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/isdn/i4l/isdn_tty.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1889,13 +1889,14 @@
- 	if (!m->tty_modem)
- 		return -ENOMEM;
- 	m->tty_modem->name = "ttyI";
-+	m->tty_modem->devfs_name = "isdn/ttyI";
- 	m->tty_modem->major = ISDN_TTY_MAJOR;
- 	m->tty_modem->minor_start = 0;
- 	m->tty_modem->type = TTY_DRIVER_TYPE_SERIAL;
- 	m->tty_modem->subtype = SERIAL_TYPE_NORMAL;
- 	m->tty_modem->init_termios = tty_std_termios;
- 	m->tty_modem->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
--	m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-+	m->tty_modem->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
- 	m->tty_modem->driver_name = "isdn_tty";
- 	tty_set_operations(m->tty_modem, &modem_ops);
- 	retval = tty_register_driver(m->tty_modem);
-diff -urN linux-2.6.19.old/drivers/macintosh/adb.c linux-2.6.19.dev/drivers/macintosh/adb.c
---- linux-2.6.19.old/drivers/macintosh/adb.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/macintosh/adb.c	2006-12-14 03:12:59.000000000 +0100
-@@ -35,6 +35,7 @@
- #include <linux/spinlock.h>
- #include <linux/completion.h>
- #include <linux/device.h>
-+#include <linux/devfs_fs_kernel.h>
- 
- #include <asm/uaccess.h>
- #include <asm/semaphore.h>
-@@ -902,6 +903,8 @@
- 		return;
- 	}
- 
-+	devfs_mk_cdev(MKDEV(ADB_MAJOR, 0), S_IFCHR | S_IRUSR | S_IWUSR, "adb");
-+
- 	adb_dev_class = class_create(THIS_MODULE, "adb");
- 	if (IS_ERR(adb_dev_class))
- 		return;
-diff -urN linux-2.6.19.old/drivers/md/dm-ioctl.c linux-2.6.19.dev/drivers/md/dm-ioctl.c
---- linux-2.6.19.old/drivers/md/dm-ioctl.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/md/dm-ioctl.c	2006-12-14 03:12:59.000000000 +0100
-@@ -13,6 +13,7 @@
- #include <linux/init.h>
- #include <linux/wait.h>
- #include <linux/slab.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/dm-ioctl.h>
- #include <linux/hdreg.h>
- 
-@@ -67,12 +68,14 @@
- {
- 	init_buckets(_name_buckets);
- 	init_buckets(_uuid_buckets);
-+	devfs_mk_dir(DM_DIR);
- 	return 0;
- }
- 
- static void dm_hash_exit(void)
- {
- 	dm_hash_remove_all(0);
-+	devfs_remove(DM_DIR);
- }
- 
- /*-----------------------------------------------------------------
-@@ -169,6 +172,25 @@
- }
- 
- /*
-+ * devfs stuff.
-+ */
-+static int register_with_devfs(struct hash_cell *hc)
-+{
-+	struct gendisk *disk = dm_disk(hc->md);
-+
-+	devfs_mk_bdev(MKDEV(disk->major, disk->first_minor),
-+		      S_IFBLK | S_IRUSR | S_IWUSR | S_IRGRP,
-+		      DM_DIR "/%s", hc->name);
-+	return 0;
-+}
-+
-+static int unregister_with_devfs(struct hash_cell *hc)
-+{
-+	devfs_remove(DM_DIR"/%s", hc->name);
-+	return 0;
-+}
-+
-+/*
-  * The kdev_t and uuid of a device can never change once it is
-  * initially inserted.
-  */
-@@ -204,6 +226,7 @@
- 		}
- 		list_add(&cell->uuid_list, _uuid_buckets + hash_str(uuid));
- 	}
-+	register_with_devfs(cell);
- 	dm_get(md);
- 	dm_set_mdptr(md, cell);
- 	up_write(&_hash_lock);
-@@ -223,6 +246,7 @@
- 	/* remove from the dev hash */
- 	list_del(&hc->uuid_list);
- 	list_del(&hc->name_list);
-+	unregister_with_devfs(hc);
- 	dm_set_mdptr(hc->md, NULL);
- 
- 	table = dm_get_table(hc->md);
-@@ -318,11 +342,16 @@
- 	/*
- 	 * rename and move the name cell.
- 	 */
-+	unregister_with_devfs(hc);
-+
- 	list_del(&hc->name_list);
- 	old_name = hc->name;
- 	hc->name = new_name;
- 	list_add(&hc->name_list, _name_buckets + hash_str(new_name));
- 
-+	/* rename the device node in devfs */
-+	register_with_devfs(hc);
-+
- 	/*
- 	 * Wake up any dm event waiters.
- 	 */
-@@ -1477,6 +1506,7 @@
- static struct miscdevice _dm_misc = {
- 	.minor 		= MISC_DYNAMIC_MINOR,
- 	.name  		= DM_NAME,
-+	.devfs_name 	= "mapper/control",
- 	.fops  		= &_ctl_fops
- };
- 
-diff -urN linux-2.6.19.old/drivers/md/md.c linux-2.6.19.dev/drivers/md/md.c
---- linux-2.6.19.old/drivers/md/md.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/md/md.c	2006-12-14 03:12:59.000000000 +0100
-@@ -38,6 +38,7 @@
- #include <linux/raid/md.h>
- #include <linux/raid/bitmap.h>
- #include <linux/sysctl.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/buffer_head.h> /* for invalidate_bdev */
- #include <linux/suspend.h>
- #include <linux/poll.h>
-@@ -2969,10 +2970,13 @@
- 	}
- 	disk->major = MAJOR(dev);
- 	disk->first_minor = unit << shift;
--	if (partitioned)
-+	if (partitioned) {
- 		sprintf(disk->disk_name, "md_d%d", unit);
--	else
-+		sprintf(disk->devfs_name, "md/d%d", unit);
-+	} else {
- 		sprintf(disk->disk_name, "md%d", unit);
-+		sprintf(disk->devfs_name, "md/%d", unit);
-+	}
- 	disk->fops = &md_fops;
- 	disk->private_data = mddev;
- 	disk->queue = mddev->queue;
-@@ -5539,11 +5543,23 @@
- 		unregister_blkdev(MAJOR_NR, "md");
- 		return -1;
- 	}
-+	devfs_mk_dir("md");
- 	blk_register_region(MKDEV(MAJOR_NR, 0), 1UL<<MINORBITS, THIS_MODULE,
- 			    md_probe, NULL, NULL);
- 	blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE,
- 			    md_probe, NULL, NULL);
- 
-+	for (minor=0; minor < MAX_MD_DEVS; ++minor)
-+		devfs_mk_bdev(MKDEV(MAJOR_NR, minor),
-+				S_IFBLK|S_IRUSR|S_IWUSR,
-+				"md/%d", minor);
-+
-+	for (minor=0; minor < MAX_MD_DEVS; ++minor)
-+		devfs_mk_bdev(MKDEV(mdp_major, minor<<MdpMinorShift),
-+			      S_IFBLK|S_IRUSR|S_IWUSR,
-+			      "md/mdp%d", minor);
-+
-+
- 	register_reboot_notifier(&md_notifier);
- 	raid_table_header = register_sysctl_table(raid_root_table, 1);
- 
-@@ -5599,9 +5615,16 @@
- {
- 	mddev_t *mddev;
- 	struct list_head *tmp;
-+	int i;
- 
- 	blk_unregister_region(MKDEV(MAJOR_NR,0), 1U << MINORBITS);
- 	blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS);
-+	for (i=0; i < MAX_MD_DEVS; i++)
-+		devfs_remove("md/%d", i);
-+	for (i=0; i < MAX_MD_DEVS; i++)
-+		devfs_remove("md/d%d", i);
-+
-+	devfs_remove("md");
- 
- 	unregister_blkdev(MAJOR_NR,"md");
- 	unregister_blkdev(mdp_major, "mdp");
-diff -urN linux-2.6.19.old/drivers/media/dvb/dvb-core/dvbdev.c linux-2.6.19.dev/drivers/media/dvb/dvb-core/dvbdev.c
---- linux-2.6.19.old/drivers/media/dvb/dvb-core/dvbdev.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/media/dvb/dvb-core/dvbdev.c	2006-12-14 03:12:59.000000000 +0100
-@@ -231,6 +231,10 @@
- 
- 	mutex_unlock(&dvbdev_register_lock);
- 
-+	devfs_mk_cdev(MKDEV(DVB_MAJOR, nums2minor(adap->num, type, id)),
-+			S_IFCHR | S_IRUSR | S_IWUSR,
-+			"dvb/adapter%d/%s%d", adap->num, dnames[type], id);
-+
- 	class_device_create(dvb_class, NULL, MKDEV(DVB_MAJOR, nums2minor(adap->num, type, id)),
- 			    adap->device, "dvb%d.%s%d", adap->num, dnames[type], id);
- 
-@@ -248,6 +252,9 @@
- 	if (!dvbdev)
- 		return;
- 
-+	devfs_remove("dvb/adapter%d/%s%d", dvbdev->adapter->num,
-+			dnames[dvbdev->type], dvbdev->id);
-+
- 	class_device_destroy(dvb_class, MKDEV(DVB_MAJOR, nums2minor(dvbdev->adapter->num,
- 					dvbdev->type, dvbdev->id)));
- 
-@@ -295,6 +302,7 @@
- 
- 	printk ("DVB: registering new adapter (%s).\n", name);
- 
-+	devfs_mk_dir("dvb/adapter%d", num);
- 	adap->num = num;
- 	adap->name = name;
- 	adap->module = module;
-@@ -311,6 +319,8 @@
- 
- int dvb_unregister_adapter(struct dvb_adapter *adap)
- {
-+	devfs_remove("dvb/adapter%d", adap->num);
-+
- 	if (mutex_lock_interruptible(&dvbdev_register_lock))
- 		return -ERESTARTSYS;
- 	list_del (&adap->list_head);
-@@ -400,6 +410,8 @@
- 		goto error;
- 	}
- 
-+	devfs_mk_dir("dvb");
-+
- 	dvb_class = class_create(THIS_MODULE, "dvb");
- 	if (IS_ERR(dvb_class)) {
- 		retval = PTR_ERR(dvb_class);
-@@ -416,6 +428,7 @@
- 
- static void __exit exit_dvbdev(void)
- {
-+	devfs_remove("dvb");
- 	class_destroy(dvb_class);
- 	cdev_del(&dvb_device_cdev);
- 	unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS);
-diff -urN linux-2.6.19.old/drivers/media/dvb/dvb-core/dvbdev.h linux-2.6.19.dev/drivers/media/dvb/dvb-core/dvbdev.h
---- linux-2.6.19.old/drivers/media/dvb/dvb-core/dvbdev.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/media/dvb/dvb-core/dvbdev.h	2006-12-14 03:12:59.000000000 +0100
-@@ -27,6 +27,7 @@
- #include <linux/poll.h>
- #include <linux/fs.h>
- #include <linux/list.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/smp_lock.h>
- 
- #define DVB_MAJOR 212
-diff -urN linux-2.6.19.old/drivers/media/dvb/ttpci/av7110.h linux-2.6.19.dev/drivers/media/dvb/ttpci/av7110.h
---- linux-2.6.19.old/drivers/media/dvb/ttpci/av7110.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/media/dvb/ttpci/av7110.h	2006-12-14 03:12:59.000000000 +0100
-@@ -6,6 +6,10 @@
- #include <linux/netdevice.h>
- #include <linux/i2c.h>
- 
-+#ifdef CONFIG_DEVFS_FS
-+#include <linux/devfs_fs_kernel.h>
-+#endif
-+
- #include <linux/dvb/video.h>
- #include <linux/dvb/audio.h>
- #include <linux/dvb/dmx.h>
-diff -urN linux-2.6.19.old/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c linux-2.6.19.dev/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c
---- linux-2.6.19.old/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/media/dvb/ttusb-budget/dvb-ttusb-budget.c	2006-12-14 03:12:59.000000000 +0100
-@@ -126,6 +126,10 @@
- 
- 	int revision;
- 
-+#if 0
-+	devfs_handle_t stc_devfs_handle;
-+#endif
-+
- 	struct dvb_frontend* fe;
- };
- 
-@@ -1741,6 +1745,13 @@
- 		return -ENODEV;
- 	}
- 
-+#if 0
-+	ttusb->stc_devfs_handle =
-+	    devfs_register(ttusb->adapter->devfs_handle, TTUSB_BUDGET_NAME,
-+			   DEVFS_FL_DEFAULT, 0, 192,
-+			   S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP
-+			   | S_IROTH | S_IWOTH, &stc_fops, ttusb);
-+#endif
- 	usb_set_intfdata(intf, (void *) ttusb);
- 
- 	frontend_init(ttusb);
-diff -urN linux-2.6.19.old/drivers/media/radio/miropcm20-rds.c linux-2.6.19.dev/drivers/media/radio/miropcm20-rds.c
---- linux-2.6.19.old/drivers/media/radio/miropcm20-rds.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/media/radio/miropcm20-rds.c	2006-12-14 03:12:59.000000000 +0100
-@@ -115,6 +115,7 @@
- static struct miscdevice rds_miscdev = {
- 	.minor		= MISC_DYNAMIC_MINOR,
- 	.name		= "radiotext",
-+	.devfs_name	= "v4l/rds/radiotext",
- 	.fops		= &rds_fops,
- };
- 
-diff -urN linux-2.6.19.old/drivers/media/video/arv.c linux-2.6.19.dev/drivers/media/video/arv.c
---- linux-2.6.19.old/drivers/media/video/arv.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/media/video/arv.c	2006-12-14 03:12:59.000000000 +0100
-@@ -19,6 +19,7 @@
-  */
- 
- #include <linux/init.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/module.h>
- #include <linux/delay.h>
- #include <linux/errno.h>
-diff -urN linux-2.6.19.old/drivers/media/video/videodev.c linux-2.6.19.dev/drivers/media/video/videodev.c
---- linux-2.6.19.old/drivers/media/video/videodev.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/media/video/videodev.c	2006-12-14 03:12:59.000000000 +0100
-@@ -38,6 +38,7 @@
- #include <linux/init.h>
- #include <linux/kmod.h>
- #include <linux/slab.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <asm/uaccess.h>
- #include <asm/system.h>
- 
-@@ -1593,6 +1594,10 @@
- 	video_device[i]=vfd;
- 	vfd->minor=i;
- 	mutex_unlock(&videodev_lock);
-+
-+	sprintf(vfd->devfs_name, "v4l/%s%d", name_base, i - base);
-+	devfs_mk_cdev(MKDEV(VIDEO_MAJOR, vfd->minor),
-+			S_IFCHR | S_IRUSR | S_IWUSR, vfd->devfs_name);
- 	mutex_init(&vfd->lock);
- 
- 	/* sysfs class */
-@@ -1602,6 +1607,7 @@
- 	vfd->class_dev.class       = &video_class;
- 	vfd->class_dev.devt        = MKDEV(VIDEO_MAJOR, vfd->minor);
- 	sprintf(vfd->class_dev.class_id, "%s%d", name_base, i - base);
-+	strlcpy(vfd->class_dev.class_id, vfd->devfs_name + 4, BUS_ID_SIZE);
- 	ret = class_device_register(&vfd->class_dev);
- 	if (ret < 0) {
- 		printk(KERN_ERR "%s: class_device_register failed\n",
-@@ -1648,6 +1654,7 @@
- 	if(video_device[vfd->minor]!=vfd)
- 		panic("videodev: bad unregister");
- 
-+	devfs_remove(vfd->devfs_name);
- 	video_device[vfd->minor]=NULL;
- 	class_device_unregister(&vfd->class_dev);
- 	mutex_unlock(&videodev_lock);
-diff -urN linux-2.6.19.old/drivers/message/i2o/i2o_block.c linux-2.6.19.dev/drivers/message/i2o/i2o_block.c
---- linux-2.6.19.old/drivers/message/i2o/i2o_block.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/message/i2o/i2o_block.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1090,6 +1090,7 @@
- 	gd = i2o_blk_dev->gd;
- 	gd->first_minor = unit << 4;
- 	sprintf(gd->disk_name, "i2o/hd%c", 'a' + unit);
-+	sprintf(gd->devfs_name, "i2o/hd%c", 'a' + unit);
- 	gd->driverfs_dev = &i2o_dev->device;
- 
- 	/* setup request queue */
-diff -urN linux-2.6.19.old/drivers/mmc/mmc_block.c linux-2.6.19.dev/drivers/mmc/mmc_block.c
---- linux-2.6.19.old/drivers/mmc/mmc_block.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/mmc/mmc_block.c	2006-12-14 03:12:59.000000000 +0100
-@@ -27,6 +27,7 @@
- #include <linux/hdreg.h>
- #include <linux/kdev_t.h>
- #include <linux/blkdev.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/mutex.h>
- #include <linux/scatterlist.h>
- 
-@@ -472,6 +473,7 @@
- 	 */
- 
- 	sprintf(md->disk->disk_name, "mmcblk%d", devidx);
-+	sprintf(md->disk->devfs_name, "mmc/blk%d", devidx);
- 
- 	blk_queue_hardsect_size(md->queue.queue, 1 << md->block_bits);
- 
-@@ -617,6 +619,7 @@
- 	if (major == 0)
- 		major = res;
- 
-+	devfs_mk_dir("mmc");
- 	return mmc_register_driver(&mmc_driver);
- 
-  out:
-@@ -626,6 +629,7 @@
- static void __exit mmc_blk_exit(void)
- {
- 	mmc_unregister_driver(&mmc_driver);
-+	devfs_remove("mmc");
- 	unregister_blkdev(major, "mmc");
- }
- 
-diff -urN linux-2.6.19.old/drivers/mtd/mtd_blkdevs.c linux-2.6.19.dev/drivers/mtd/mtd_blkdevs.c
---- linux-2.6.19.old/drivers/mtd/mtd_blkdevs.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/mtd/mtd_blkdevs.c	2006-12-14 03:12:59.000000000 +0100
-@@ -21,6 +21,9 @@
- #include <linux/init.h>
- #include <linux/mutex.h>
- #include <asm/uaccess.h>
-+#ifdef CONFIG_DEVFS_FS
-+#include <linux/devfs_fs_kernel.h>
-+#endif
- 
- static LIST_HEAD(blktrans_majors);
- 
-@@ -295,6 +298,11 @@
- 		snprintf(gd->disk_name, sizeof(gd->disk_name),
- 			 "%s%d", tr->name, new->devnum);
- 
-+#ifdef CONFIG_DEVFS_FS
-+		snprintf(gd->devfs_name, sizeof(gd->devfs_name),
-+			 "%s/%c", tr->name, (tr->part_bits?'a':'0') + new->devnum);
-+#endif
-+
- 	/* 2.5 has capacity in units of 512 bytes while still
- 	   having BLOCK_SIZE_BITS set to 10. Just to keep us amused. */
- 	set_capacity(gd, (new->size * new->blksize) >> 9);
-@@ -411,6 +419,10 @@
- 		return ret;
- 	}
- 
-+#ifdef CONFIG_DEVFS_FS
-+	devfs_mk_dir(tr->name);
-+#endif
-+
- 	INIT_LIST_HEAD(&tr->devs);
- 	list_add(&tr->list, &blktrans_majors);
- 
-@@ -443,6 +455,10 @@
- 		tr->remove_dev(dev);
- 	}
- 
-+#ifdef CONFIG_DEVFS_FS
-+	devfs_remove(tr->name);
-+#endif
-+
- 	blk_cleanup_queue(tr->blkcore_priv->rq);
- 	unregister_blkdev(tr->major, tr->name);
- 
-diff -urN linux-2.6.19.old/drivers/mtd/mtdchar.c linux-2.6.19.dev/drivers/mtd/mtdchar.c
---- linux-2.6.19.old/drivers/mtd/mtdchar.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/mtd/mtdchar.c	2006-12-14 03:12:59.000000000 +0100
-@@ -18,19 +18,33 @@
- 
- #include <asm/uaccess.h>
- 
-+#ifdef CONFIG_DEVFS_FS
-+#include <linux/devfs_fs_kernel.h>
-+#else
-+#include <linux/device.h>
-+
- static struct class *mtd_class;
-+#endif
- 
- static void mtd_notify_add(struct mtd_info* mtd)
- {
- 	if (!mtd)
- 		return;
- 
-+#ifdef CONFIG_DEVFS_FS
-+	devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2),
-+			S_IFCHR | S_IRUGO | S_IWUGO, "mtd/%d", mtd->index);
-+
-+	devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1),
-+			S_IFCHR | S_IRUGO, "mtd/%dro", mtd->index);
-+#else
- 	class_device_create(mtd_class, NULL, MKDEV(MTD_CHAR_MAJOR, mtd->index*2),
- 			    NULL, "mtd%d", mtd->index);
- 
- 	class_device_create(mtd_class, NULL,
- 			    MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1),
- 			    NULL, "mtd%dro", mtd->index);
-+#endif
- }
- 
- static void mtd_notify_remove(struct mtd_info* mtd)
-@@ -38,8 +52,13 @@
- 	if (!mtd)
- 		return;
- 
-+#ifdef CONFIG_DEVFS_FS
-+	devfs_remove("mtd/%d", mtd->index);
-+	devfs_remove("mtd/%dro", mtd->index);
-+#else
- 	class_device_destroy(mtd_class, MKDEV(MTD_CHAR_MAJOR, mtd->index*2));
- 	class_device_destroy(mtd_class, MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1));
-+#endif
- }
- 
- static struct mtd_notifier notifier = {
-@@ -47,6 +66,22 @@
- 	.remove	= mtd_notify_remove,
- };
- 
-+#ifdef CONFIG_DEVFS_FS
-+	static inline void mtdchar_devfs_init(void)
-+	{
-+		devfs_mk_dir("mtd");
-+		register_mtd_user(&notifier);
-+	}
-+	static inline void mtdchar_devfs_exit(void)
-+	{
-+		unregister_mtd_user(&notifier);
-+		devfs_remove("mtd");
-+	}
-+	#else /* !DEVFS */
-+	#define mtdchar_devfs_init() do { } while(0)
-+	#define mtdchar_devfs_exit() do { } while(0)
-+#endif
-+
- /*
-  * Data structure to hold the pointer to the mtd device as well
-  * as mode information ofr various use cases.
-@@ -778,6 +813,9 @@
- 		return -EAGAIN;
- 	}
- 
-+#ifdef CONFIG_DEVFS_FS
-+	mtdchar_devfs_init();
-+#else
- 	mtd_class = class_create(THIS_MODULE, "mtd");
- 
- 	if (IS_ERR(mtd_class)) {
-@@ -787,13 +825,19 @@
- 	}
- 
- 	register_mtd_user(&notifier);
-+#endif
- 	return 0;
- }
- 
- static void __exit cleanup_mtdchar(void)
- {
-+
-+#ifdef CONFIG_DEVFS_FS
-+	mtdchar_devfs_exit();
-+#else
- 	unregister_mtd_user(&notifier);
- 	class_destroy(mtd_class);
-+#endif
- 	unregister_chrdev(MTD_CHAR_MAJOR, "mtd");
- }
- 
-diff -urN linux-2.6.19.old/drivers/net/ppp_generic.c linux-2.6.19.dev/drivers/net/ppp_generic.c
---- linux-2.6.19.old/drivers/net/ppp_generic.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/net/ppp_generic.c	2006-12-14 03:12:59.000000000 +0100
-@@ -27,6 +27,7 @@
- #include <linux/kmod.h>
- #include <linux/init.h>
- #include <linux/list.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/netdevice.h>
- #include <linux/poll.h>
- #include <linux/ppp_defs.h>
-@@ -861,6 +862,10 @@
- 			goto out_chrdev;
- 		}
- 		class_device_create(ppp_class, NULL, MKDEV(PPP_MAJOR, 0), NULL, "ppp");
-+		err = devfs_mk_cdev(MKDEV(PPP_MAJOR, 0),
-+				S_IFCHR|S_IRUSR|S_IWUSR, "ppp");
-+		if (err)
-+			goto out_chrdev;
- 	}
- 
- out:
-@@ -2675,6 +2680,7 @@
- 	cardmap_destroy(&all_ppp_units);
- 	if (unregister_chrdev(PPP_MAJOR, "ppp") != 0)
- 		printk(KERN_ERR "PPP: failed to unregister PPP device\n");
-+	devfs_remove("ppp");
- 	class_device_destroy(ppp_class, MKDEV(PPP_MAJOR, 0));
- 	class_destroy(ppp_class);
- }
-diff -urN linux-2.6.19.old/drivers/net/tun.c linux-2.6.19.dev/drivers/net/tun.c
---- linux-2.6.19.old/drivers/net/tun.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/net/tun.c	2006-12-14 03:12:59.000000000 +0100
-@@ -762,6 +762,7 @@
- 	.minor = TUN_MINOR,
- 	.name = "tun",
- 	.fops = &tun_fops,
-+	.devfs_name = "net/tun",
- };
- 
- /* ethtool interface */
-diff -urN linux-2.6.19.old/drivers/net/wan/cosa.c linux-2.6.19.dev/drivers/net/wan/cosa.c
---- linux-2.6.19.old/drivers/net/wan/cosa.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/net/wan/cosa.c	2006-12-14 03:12:59.000000000 +0100
-@@ -84,6 +84,7 @@
- #include <linux/slab.h>
- #include <linux/poll.h>
- #include <linux/fs.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/interrupt.h>
- #include <linux/delay.h>
- #include <linux/errno.h>
-@@ -391,6 +392,7 @@
- 		err = -ENODEV;
- 		goto out;
- 	}
-+	devfs_mk_dir("cosa");
- 	cosa_class = class_create(THIS_MODULE, "cosa");
- 	if (IS_ERR(cosa_class)) {
- 		err = PTR_ERR(cosa_class);
-@@ -399,6 +401,13 @@
- 	for (i=0; i<nr_cards; i++) {
- 		class_device_create(cosa_class, NULL, MKDEV(cosa_major, i),
- 				NULL, "cosa%d", i);
-+		err = devfs_mk_cdev(MKDEV(cosa_major, i),
-+				S_IFCHR|S_IRUSR|S_IWUSR,
-+				"cosa/%d", i);
-+		if (err) {
-+			class_device_destroy(cosa_class, MKDEV(cosa_major, i));
-+			goto out_chrdev;		
-+		}
- 	}
- 	err = 0;
- 	goto out;
-@@ -416,9 +425,12 @@
- 	int i;
- 	printk(KERN_INFO "Unloading the cosa module\n");
- 
--	for (i=0; i<nr_cards; i++)
-+	for (i=0; i<nr_cards; i++) {
- 		class_device_destroy(cosa_class, MKDEV(cosa_major, i));
-+		devfs_remove("cosa/%d", i);
-+	}
- 	class_destroy(cosa_class);
-+	devfs_remove("cosa");
- 	for (cosa=cosa_cards; nr_cards--; cosa++) {
- 		/* Clean up the per-channel data */
- 		for (i=0; i<cosa->nchannels; i++) {
-diff -urN linux-2.6.19.old/drivers/s390/block/dasd.c linux-2.6.19.dev/drivers/s390/block/dasd.c
---- linux-2.6.19.old/drivers/s390/block/dasd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/s390/block/dasd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1903,6 +1903,7 @@
- 	}
- 	dasd_gendisk_exit();
- 	dasd_devmap_exit();
-+	devfs_remove("dasd");
- 	if (dasd_debug_area != NULL) {
- 		debug_unregister(dasd_debug_area);
- 		dasd_debug_area = NULL;
-@@ -2176,6 +2177,9 @@
- 
- 	dasd_diag_discipline_pointer = NULL;
- 
-+	rc = devfs_mk_dir("dasd");
-+	if (rc)
-+		goto failed;
- 	rc = dasd_devmap_init();
- 	if (rc)
- 		goto failed;
-diff -urN linux-2.6.19.old/drivers/s390/block/dasd_genhd.c linux-2.6.19.dev/drivers/s390/block/dasd_genhd.c
---- linux-2.6.19.old/drivers/s390/block/dasd_genhd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/s390/block/dasd_genhd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -67,6 +67,8 @@
- 	}
- 	len += sprintf(gdp->disk_name + len, "%c", 'a'+(device->devindex%26));
- 
-+ 	sprintf(gdp->devfs_name, "dasd/%s", device->cdev->dev.bus_id);
-+
- 	if (device->features & DASD_FEATURE_READONLY)
- 		set_disk_ro(gdp, 1);
- 	gdp->private_data = device;
-diff -urN linux-2.6.19.old/drivers/s390/block/dasd_int.h linux-2.6.19.dev/drivers/s390/block/dasd_int.h
---- linux-2.6.19.old/drivers/s390/block/dasd_int.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/s390/block/dasd_int.h	2006-12-14 03:12:59.000000000 +0100
-@@ -54,6 +54,7 @@
- #include <linux/module.h>
- #include <linux/wait.h>
- #include <linux/blkdev.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/genhd.h>
- #include <linux/hdreg.h>
- #include <linux/interrupt.h>
-diff -urN linux-2.6.19.old/drivers/s390/block/xpram.c linux-2.6.19.dev/drivers/s390/block/xpram.c
---- linux-2.6.19.old/drivers/s390/block/xpram.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/s390/block/xpram.c	2006-12-14 03:12:59.000000000 +0100
-@@ -36,6 +36,7 @@
- #include <linux/hdreg.h>  /* HDIO_GETGEO */
- #include <linux/sysdev.h>
- #include <linux/bio.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <asm/uaccess.h>
- 
- #define XPRAM_NAME	"xpram"
-@@ -363,6 +364,8 @@
- 	if (rc < 0)
- 		goto out;
- 
-+	devfs_mk_dir("slram");
-+
- 	/*
- 	 * Assign the other needed values: make request function, sizes and
- 	 * hardsect size. All the minor devices feature the same value.
-@@ -391,12 +394,14 @@
- 		disk->private_data = &xpram_devices[i];
- 		disk->queue = xpram_queue;
- 		sprintf(disk->disk_name, "slram%d", i);
-+		sprintf(disk->devfs_name, "slram/%d", i);
- 		set_capacity(disk, xpram_sizes[i] << 1);
- 		add_disk(disk);
- 	}
- 
- 	return 0;
- out_unreg:
-+	devfs_remove("slram");
- 	unregister_blkdev(XPRAM_MAJOR, XPRAM_NAME);
- out:
- 	while (i--)
-@@ -415,7 +420,10 @@
- 		put_disk(xpram_disks[i]);
- 	}
- 	unregister_blkdev(XPRAM_MAJOR, XPRAM_NAME);
-+	devfs_remove("slram");
- 	blk_cleanup_queue(xpram_queue);
-+	sysdev_unregister(&xpram_sys_device);
-+	sysdev_class_unregister(&xpram_sysclass);
- }
- 
- static int __init xpram_init(void)
-diff -urN linux-2.6.19.old/drivers/s390/char/monreader.c linux-2.6.19.dev/drivers/s390/char/monreader.c
---- linux-2.6.19.old/drivers/s390/char/monreader.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/s390/char/monreader.c	2006-12-14 03:12:59.000000000 +0100
-@@ -586,6 +586,7 @@
- 
- static struct miscdevice mon_dev = {
- 	.name       = "monreader",
-+	.devfs_name = "monreader",
- 	.fops       = &mon_fops,
- 	.minor      = MISC_DYNAMIC_MINOR,
- };
-diff -urN linux-2.6.19.old/drivers/s390/char/tty3270.c linux-2.6.19.dev/drivers/s390/char/tty3270.c
---- linux-2.6.19.old/drivers/s390/char/tty3270.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/s390/char/tty3270.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1783,6 +1783,7 @@
- 	 * proc_entry, set_termios, flush_buffer, set_ldisc, write_proc
- 	 */
- 	driver->owner = THIS_MODULE;
-+	driver->devfs_name = "ttyTUB/";
- 	driver->driver_name = "ttyTUB";
- 	driver->name = "ttyTUB";
- 	driver->major = IBM_TTY3270_MAJOR;
-@@ -1790,7 +1791,7 @@
- 	driver->type = TTY_DRIVER_TYPE_SYSTEM;
- 	driver->subtype = SYSTEM_TYPE_TTY;
- 	driver->init_termios = tty_std_termios;
--	driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_DYNAMIC_DEV;
-+	driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_NO_DEVFS;
- 	tty_set_operations(driver, &tty3270_ops);
- 	ret = tty_register_driver(driver);
- 	if (ret) {
-diff -urN linux-2.6.19.old/drivers/sbus/char/bpp.c linux-2.6.19.dev/drivers/sbus/char/bpp.c
---- linux-2.6.19.old/drivers/sbus/char/bpp.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/sbus/char/bpp.c	2006-12-14 03:12:59.000000000 +0100
-@@ -20,6 +20,7 @@
- #include <linux/timer.h>
- #include <linux/ioport.h>
- #include <linux/major.h>
-+#include <linux/devfs_fs_kernel.h>
- 
- #include <asm/uaccess.h>
- #include <asm/io.h>
-@@ -1030,6 +1031,11 @@
- 		instances[idx].opened = 0;
- 		probeLptPort(idx);
- 	}
-+	devfs_mk_dir("bpp");
-+	for (idx = 0; idx < BPP_NO; idx++) {
-+		devfs_mk_cdev(MKDEV(BPP_MAJOR, idx),
-+				S_IFCHR | S_IRUSR | S_IWUSR, "bpp/%d", idx);
-+	}
- 
- 	return 0;
- }
-@@ -1038,6 +1044,9 @@
- {
- 	unsigned idx;
- 
-+	for (idx = 0; idx < BPP_NO; idx++)
-+		devfs_remove("bpp/%d", idx);
-+	devfs_remove("bpp");
- 	unregister_chrdev(BPP_MAJOR, dev_name);
- 
- 	for (idx = 0;  idx < BPP_NO; idx++) {
-diff -urN linux-2.6.19.old/drivers/sbus/char/vfc_dev.c linux-2.6.19.dev/drivers/sbus/char/vfc_dev.c
---- linux-2.6.19.old/drivers/sbus/char/vfc_dev.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/sbus/char/vfc_dev.c	2006-12-14 03:12:59.000000000 +0100
-@@ -164,6 +164,10 @@
- 		return -EINVAL;
- 	if (init_vfc_hw(dev))
- 		return -EIO;
-+
-+	devfs_mk_cdev(MKDEV(VFC_MAJOR, instance),
-+			S_IFCHR | S_IRUSR | S_IWUSR,
-+			"vfc/%d", instance);
- 	return 0;
- }
- 
-@@ -673,6 +677,7 @@
- 		kfree(vfc_dev_lst);
- 		return -EIO;
- 	}
-+	devfs_mk_dir("vfc");
- 	instance = 0;
- 	for_all_sbusdev(sdev, sbus) {
- 		if (strcmp(sdev->prom_name, "vfc") == 0) {
-@@ -712,6 +717,7 @@
- {
- 	if(dev == NULL)
- 		return;
-+	devfs_remove("vfc/%d", dev->instance);
- 	sbus_iounmap(dev->regs, sizeof(struct vfc_regs));
- 	kfree(dev);
- }
-@@ -725,6 +731,7 @@
- 	for (devp = vfc_dev_lst; *devp; devp++)
- 		deinit_vfc_device(*devp);
- 
-+	devfs_remove("vfc");
- 	kfree(vfc_dev_lst);
- 	return;
- }
-diff -urN linux-2.6.19.old/drivers/sbus/char/vfc.h linux-2.6.19.dev/drivers/sbus/char/vfc.h
---- linux-2.6.19.old/drivers/sbus/char/vfc.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/sbus/char/vfc.h	2006-12-14 03:12:59.000000000 +0100
-@@ -1,6 +1,8 @@
- #ifndef _LINUX_VFC_H_
- #define _LINUX_VFC_H_
- 
-+#include <linux/devfs_fs_kernel.h>
-+
- /*
-  * The control register for the vfc is at offset 0x4000
-  * The first field ram bank is located at offset 0x5000
-diff -urN linux-2.6.19.old/drivers/scsi/osst.c linux-2.6.19.dev/drivers/scsi/osst.c
---- linux-2.6.19.old/drivers/scsi/osst.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/scsi/osst.c	2006-12-14 03:12:59.000000000 +0100
-@@ -48,6 +48,7 @@
- #include <linux/vmalloc.h>
- #include <linux/blkdev.h>
- #include <linux/moduleparam.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/delay.h>
- #include <linux/jiffies.h>
- #include <asm/uaccess.h>
-@@ -5859,6 +5860,18 @@
- 		STps->drv_block = (-1);
- 		STps->drv_file = (-1);
- 	}
-+	for (mode = 0; mode < ST_NBR_MODES; ++mode) {
-+		/*  Rewind entry  */
-+		devfs_mk_cdev(MKDEV(OSST_MAJOR, dev_num + (mode << 5)),
-+				S_IFCHR | S_IRUGO | S_IWUGO,
-+				"%s/ot%s", SDp->devfs_name, osst_formats[mode]);
-+
-+		/*  No-rewind entry  */
-+		devfs_mk_cdev(MKDEV(OSST_MAJOR, dev_num + (mode << 5) + 128),
-+				S_IFCHR | S_IRUGO | S_IWUGO,
-+				"%s/ot%sn", SDp->devfs_name, osst_formats[mode]);
-+	}
-+	drive->number = devfs_register_tape(SDp->devfs_name);
- 
- 	tpnt->current_mode = 0;
- 	tpnt->modes[0].defined = 1;
-@@ -5914,6 +5927,11 @@
- 			osst_sysfs_destroy(MKDEV(OSST_MAJOR, i));
- 			osst_sysfs_destroy(MKDEV(OSST_MAJOR, i+128));
- 			tpnt->device = NULL;
-+			for (mode = 0; mode < ST_NBR_MODES; ++mode) {
-+				devfs_remove("%s/ot%s", SDp->devfs_name, osst_formats[mode]);
-+				devfs_remove("%s/ot%sn", SDp->devfs_name, osst_formats[mode]);
-+			}
-+			devfs_unregister_tape(tpnt->drive->number);
- 			put_disk(tpnt->drive);
- 			os_scsi_tapes[i] = NULL;
- 			osst_nr_dev--;
-diff -urN linux-2.6.19.old/drivers/scsi/scsi.c linux-2.6.19.dev/drivers/scsi/scsi.c
---- linux-2.6.19.old/drivers/scsi/scsi.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/scsi/scsi.c	2006-12-14 03:12:59.000000000 +0100
-@@ -48,6 +48,7 @@
- #include <linux/delay.h>
- #include <linux/init.h>
- #include <linux/completion.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/unistd.h>
- #include <linux/spinlock.h>
- #include <linux/kmod.h>
-@@ -1119,6 +1120,7 @@
- 
- 	scsi_netlink_init();
- 
-+	devfs_mk_dir("scsi");
- 	printk(KERN_NOTICE "SCSI subsystem initialized\n");
- 	return 0;
- 
-@@ -1144,6 +1146,7 @@
- 	scsi_exit_sysctl();
- 	scsi_exit_hosts();
- 	scsi_exit_devinfo();
-+	devfs_remove("scsi");
- 	scsi_exit_procfs();
- 	scsi_exit_queue();
- }
-diff -urN linux-2.6.19.old/drivers/scsi/scsi_scan.c linux-2.6.19.dev/drivers/scsi/scsi_scan.c
---- linux-2.6.19.old/drivers/scsi/scsi_scan.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/scsi/scsi_scan.c	2006-12-14 03:12:59.000000000 +0100
-@@ -719,8 +719,12 @@
- 			sdev->inq_periph_qual, inq_result[2] & 0x07,
- 			(inq_result[3] & 0x0f) == 1 ? " CCS" : "");
- 
-+	sprintf(sdev->devfs_name, "scsi/host%d/bus%d/target%d/lun%d",
-+				sdev->host->host_no, sdev->channel,
-+				sdev->id, sdev->lun);
-+
- 	/*
--	 * End sysfs code.
-+	 * End driverfs/devfs code.
- 	 */
- 
- 	if ((sdev->scsi_level >= SCSI_2) && (inq_result[7] & 2) &&
-diff -urN linux-2.6.19.old/drivers/scsi/sd.c linux-2.6.19.dev/drivers/scsi/sd.c
---- linux-2.6.19.old/drivers/scsi/sd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/scsi/sd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1687,6 +1687,8 @@
- 			'a' + m1, 'a' + m2, 'a' + m3);
- 	}
- 
-+	strcpy(gd->devfs_name, sdp->devfs_name);
-+
- 	gd->private_data = &sdkp->driver;
- 	gd->queue = sdkp->device->request_queue;
- 
-diff -urN linux-2.6.19.old/drivers/scsi/sg.c linux-2.6.19.dev/drivers/scsi/sg.c
---- linux-2.6.19.old/drivers/scsi/sg.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/scsi/sg.c	2006-12-14 03:12:59.000000000 +0100
-@@ -43,6 +43,7 @@
- #include <linux/poll.h>
- #include <linux/smp_lock.h>
- #include <linux/moduleparam.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/cdev.h>
- #include <linux/seq_file.h>
- #include <linux/blkdev.h>
-@@ -1530,6 +1531,7 @@
- 		class_device_destroy(sg_sysfs_class, MKDEV(SCSI_GENERIC_MAJOR, k));
- 		cdev_del(sdp->cdev);
- 		sdp->cdev = NULL;
-+		devfs_remove("%s/generic", scsidp->devfs_name);
- 		put_disk(sdp->disk);
- 		sdp->disk = NULL;
- 		if (NULL == sdp->headfp)
-diff -urN linux-2.6.19.old/drivers/scsi/sr.c linux-2.6.19.dev/drivers/scsi/sr.c
---- linux-2.6.19.old/drivers/scsi/sr.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/scsi/sr.c	2006-12-14 03:12:59.000000000 +0100
-@@ -591,6 +591,8 @@
- 	get_capabilities(cd);
- 	sr_vendor_init(cd);
- 
-+	snprintf(disk->devfs_name, sizeof(disk->devfs_name),
-+			"%s/cd", sdev->devfs_name);
- 	disk->driverfs_dev = &sdev->sdev_gendev;
- 	set_capacity(disk, cd->capacity);
- 	disk->private_data = &cd->driver;
-diff -urN linux-2.6.19.old/drivers/scsi/st.c linux-2.6.19.dev/drivers/scsi/st.c
---- linux-2.6.19.old/drivers/scsi/st.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/scsi/st.c	2006-12-14 03:12:59.000000000 +0100
-@@ -35,6 +35,7 @@
- #include <linux/spinlock.h>
- #include <linux/blkdev.h>
- #include <linux/moduleparam.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/cdev.h>
- #include <linux/delay.h>
- #include <linux/mutex.h>
-@@ -4056,6 +4057,21 @@
- 			goto out_free_tape;
- 	}
- 
-+	for (mode = 0; mode < ST_NBR_MODES; ++mode) {
-+		/* Make sure that the minor numbers corresponding to the four
-+		   first modes always get the same names */
-+		i = mode << (4 - ST_NBR_MODE_BITS);
-+		/*  Rewind entry  */
-+		devfs_mk_cdev(MKDEV(SCSI_TAPE_MAJOR, TAPE_MINOR(dev_num, mode, 0)),
-+			      S_IFCHR | S_IRUGO | S_IWUGO,
-+			      "%s/mt%s", SDp->devfs_name, st_formats[i]);
-+		/*  No-rewind entry  */
-+		devfs_mk_cdev(MKDEV(SCSI_TAPE_MAJOR, TAPE_MINOR(dev_num, mode, 1)),
-+			      S_IFCHR | S_IRUGO | S_IWUGO,
-+			      "%s/mt%sn", SDp->devfs_name, st_formats[i]);
-+	}
-+	disk->number = devfs_register_tape(SDp->devfs_name);
-+
- 	sdev_printk(KERN_WARNING, SDp,
- 		    "Attached scsi tape %s\n", tape_name(tpnt));
- 	printk(KERN_WARNING "%s: try direct i/o: %s (alignment %d B)\n",
-@@ -4109,9 +4125,13 @@
- 			scsi_tapes[i] = NULL;
- 			st_nr_dev--;
- 			write_unlock(&st_dev_arr_lock);
-+			devfs_unregister_tape(tpnt->disk->number);
- 			sysfs_remove_link(&tpnt->device->sdev_gendev.kobj,
- 					  "tape");
- 			for (mode = 0; mode < ST_NBR_MODES; ++mode) {
-+				j = mode << (4 - ST_NBR_MODE_BITS);
-+				devfs_remove("%s/mt%s", SDp->devfs_name, st_formats[j]);
-+				devfs_remove("%s/mt%sn", SDp->devfs_name, st_formats[j]);
- 				for (j=0; j < 2; j++) {
- 					class_device_destroy(st_sysfs_class,
- 							     MKDEV(SCSI_TAPE_MAJOR,
-diff -urN linux-2.6.19.old/drivers/serial/21285.c linux-2.6.19.dev/drivers/serial/21285.c
---- linux-2.6.19.old/drivers/serial/21285.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/21285.c	2006-12-14 03:12:59.000000000 +0100
-@@ -478,6 +478,7 @@
- 	.owner			= THIS_MODULE,
- 	.driver_name		= "ttyFB",
- 	.dev_name		= "ttyFB",
-+	.devfs_name             = "ttyFB",
- 	.major			= SERIAL_21285_MAJOR,
- 	.minor			= SERIAL_21285_MINOR,
- 	.nr			= 1,
-diff -urN linux-2.6.19.old/drivers/serial/8250.c linux-2.6.19.dev/drivers/serial/8250.c
---- linux-2.6.19.old/drivers/serial/8250.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/8250.c	2006-12-14 03:12:59.000000000 +0100
-@@ -2381,6 +2381,7 @@
- static struct uart_driver serial8250_reg = {
- 	.owner			= THIS_MODULE,
- 	.driver_name		= "serial",
-+	.devfs_name		= "tts/",
- 	.dev_name		= "ttyS",
- 	.major			= TTY_MAJOR,
- 	.minor			= 64,
-diff -urN linux-2.6.19.old/drivers/serial/atmel_serial.c linux-2.6.19.dev/drivers/serial/atmel_serial.c
---- linux-2.6.19.old/drivers/serial/atmel_serial.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/atmel_serial.c	2006-12-14 03:12:59.000000000 +0100
-@@ -875,6 +875,7 @@
- 	.owner			= THIS_MODULE,
- 	.driver_name		= "atmel_serial",
- 	.dev_name		= ATMEL_DEVICENAME,
-+	.devfs_name		= ATMEL_DEVICENAME,
- 	.major			= SERIAL_ATMEL_MAJOR,
- 	.minor			= MINOR_START,
- 	.nr			= ATMEL_MAX_UART,
-diff -urN linux-2.6.19.old/drivers/serial/crisv10.c linux-2.6.19.dev/drivers/serial/crisv10.c
---- linux-2.6.19.old/drivers/serial/crisv10.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/crisv10.c	2006-12-14 03:12:59.000000000 +0100
-@@ -4877,7 +4877,7 @@
- 	driver->init_termios = tty_std_termios;
- 	driver->init_termios.c_cflag =
- 		B115200 | CS8 | CREAD | HUPCL | CLOCAL; /* is normally B9600 default... */
--	driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-+	driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
- 	driver->termios = serial_termios;
- 	driver->termios_locked = serial_termios_locked;
- 
-diff -urN linux-2.6.19.old/drivers/serial/dz.c linux-2.6.19.dev/drivers/serial/dz.c
---- linux-2.6.19.old/drivers/serial/dz.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/dz.c	2006-12-14 03:12:59.000000000 +0100
-@@ -767,7 +767,11 @@
- static struct uart_driver dz_reg = {
- 	.owner			= THIS_MODULE,
- 	.driver_name		= "serial",
-+#ifdef CONFIG_DEVFS
-+	.dev_name		= "tts/%d",
-+#else
- 	.dev_name		= "ttyS%d",
-+#endif
- 	.major			= TTY_MAJOR,
- 	.minor			= 64,
- 	.nr			= DZ_NB_PORT,
-diff -urN linux-2.6.19.old/drivers/serial/imx.c linux-2.6.19.dev/drivers/serial/imx.c
---- linux-2.6.19.old/drivers/serial/imx.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/imx.c	2006-12-14 03:12:59.000000000 +0100
-@@ -887,6 +887,7 @@
- 	.owner          = THIS_MODULE,
- 	.driver_name    = DRIVER_NAME,
- 	.dev_name       = "ttySMX",
-+	.devfs_name	= "ttsmx/",
- 	.major          = SERIAL_IMX_MAJOR,
- 	.minor          = MINOR_START,
- 	.nr             = ARRAY_SIZE(imx_ports),
-diff -urN linux-2.6.19.old/drivers/serial/ip22zilog.c linux-2.6.19.dev/drivers/serial/ip22zilog.c
---- linux-2.6.19.old/drivers/serial/ip22zilog.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/ip22zilog.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1082,6 +1082,7 @@
- static struct uart_driver ip22zilog_reg = {
- 	.owner		= THIS_MODULE,
- 	.driver_name	= "serial",
-+	.devfs_name	= "tts/",
- 	.dev_name	= "ttyS",
- 	.major		= TTY_MAJOR,
- 	.minor		= 64,
-diff -urN linux-2.6.19.old/drivers/serial/m32r_sio.c linux-2.6.19.dev/drivers/serial/m32r_sio.c
---- linux-2.6.19.old/drivers/serial/m32r_sio.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/m32r_sio.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1127,6 +1127,7 @@
- static struct uart_driver m32r_sio_reg = {
- 	.owner			= THIS_MODULE,
- 	.driver_name		= "sio",
-+	.devfs_name		= "tts/",
- 	.dev_name		= "ttyS",
- 	.major			= TTY_MAJOR,
- 	.minor			= 64,
-diff -urN linux-2.6.19.old/drivers/serial/mcfserial.c linux-2.6.19.dev/drivers/serial/mcfserial.c
---- linux-2.6.19.old/drivers/serial/mcfserial.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/mcfserial.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1713,6 +1713,7 @@
- 	/* Initialize the tty_driver structure */
- 	mcfrs_serial_driver->owner = THIS_MODULE;
- 	mcfrs_serial_driver->name = "ttyS";
-+	mcfrs_serial_driver->devfs_name = "ttys/";
- 	mcfrs_serial_driver->driver_name = "serial";
- 	mcfrs_serial_driver->major = TTY_MAJOR;
- 	mcfrs_serial_driver->minor_start = 64;
-diff -urN linux-2.6.19.old/drivers/serial/mpc52xx_uart.c linux-2.6.19.dev/drivers/serial/mpc52xx_uart.c
---- linux-2.6.19.old/drivers/serial/mpc52xx_uart.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/mpc52xx_uart.c	2006-12-14 03:12:59.000000000 +0100
-@@ -693,6 +693,7 @@
- 	.owner		= THIS_MODULE,
- 	.driver_name	= "mpc52xx_psc_uart",
- 	.dev_name	= "ttyPSC",
-+	.devfs_name	= "ttyPSC",
- 	.major		= SERIAL_PSC_MAJOR,
- 	.minor		= SERIAL_PSC_MINOR,
- 	.nr		= MPC52xx_PSC_MAXNUM,
-diff -urN linux-2.6.19.old/drivers/serial/mpsc.c linux-2.6.19.dev/drivers/serial/mpsc.c
---- linux-2.6.19.old/drivers/serial/mpsc.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/mpsc.c	2006-12-14 03:12:59.000000000 +0100
-@@ -314,6 +314,7 @@
- #define MPSC_MAJOR		204
- #define MPSC_MINOR_START	44
- #define	MPSC_DRIVER_NAME	"MPSC"
-+#define	MPSC_DEVFS_NAME		"ttymm/"
- #define	MPSC_DEV_NAME		"ttyMM"
- #define	MPSC_VERSION		"1.00"
- 
-@@ -1861,6 +1862,7 @@
- static struct uart_driver mpsc_reg = {
- 	.owner       = THIS_MODULE,
- 	.driver_name = MPSC_DRIVER_NAME,
-+	.devfs_name  = MPSC_DEVFS_NAME,
- 	.dev_name    = MPSC_DEV_NAME,
- 	.major       = MPSC_MAJOR,
- 	.minor       = MPSC_MINOR_START,
-diff -urN linux-2.6.19.old/drivers/serial/pmac_zilog.c linux-2.6.19.dev/drivers/serial/pmac_zilog.c
---- linux-2.6.19.old/drivers/serial/pmac_zilog.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/pmac_zilog.c	2006-12-14 03:12:59.000000000 +0100
-@@ -100,6 +100,7 @@
- static struct uart_driver pmz_uart_reg = {
- 	.owner		=	THIS_MODULE,
- 	.driver_name	=	"ttyS",
-+	.devfs_name	=	"tts/",
- 	.dev_name	=	"ttyS",
- 	.major		=	TTY_MAJOR,
- };
-diff -urN linux-2.6.19.old/drivers/serial/pxa.c linux-2.6.19.dev/drivers/serial/pxa.c
---- linux-2.6.19.old/drivers/serial/pxa.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/pxa.c	2006-12-14 03:12:59.000000000 +0100
-@@ -777,6 +777,7 @@
- static struct uart_driver serial_pxa_reg = {
- 	.owner		= THIS_MODULE,
- 	.driver_name	= "PXA serial",
-+	.devfs_name	= "tts/",
- 	.dev_name	= "ttyS",
- 	.major		= TTY_MAJOR,
- 	.minor		= 64,
-diff -urN linux-2.6.19.old/drivers/serial/s3c2410.c linux-2.6.19.dev/drivers/serial/s3c2410.c
---- linux-2.6.19.old/drivers/serial/s3c2410.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/s3c2410.c	2006-12-14 03:12:59.000000000 +0100
-@@ -148,6 +148,7 @@
- /* UART name and device definitions */
- 
- #define S3C24XX_SERIAL_NAME	"ttySAC"
-+#define S3C24XX_SERIAL_DEVFS    "tts/"
- #define S3C24XX_SERIAL_MAJOR	204
- #define S3C24XX_SERIAL_MINOR	64
- 
-@@ -950,6 +951,7 @@
- 	.nr		= 3,
- 	.cons		= S3C24XX_SERIAL_CONSOLE,
- 	.driver_name	= S3C24XX_SERIAL_NAME,
-+	.devfs_name	= S3C24XX_SERIAL_DEVFS,
- 	.major		= S3C24XX_SERIAL_MAJOR,
- 	.minor		= S3C24XX_SERIAL_MINOR,
- };
-diff -urN linux-2.6.19.old/drivers/serial/sa1100.c linux-2.6.19.dev/drivers/serial/sa1100.c
---- linux-2.6.19.old/drivers/serial/sa1100.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/sa1100.c	2006-12-14 03:12:59.000000000 +0100
-@@ -815,6 +815,7 @@
- 	.owner			= THIS_MODULE,
- 	.driver_name		= "ttySA",
- 	.dev_name		= "ttySA",
-+	.devfs_name		= "ttySA",
- 	.major			= SERIAL_SA1100_MAJOR,
- 	.minor			= MINOR_START,
- 	.nr			= NR_PORTS,
-diff -urN linux-2.6.19.old/drivers/serial/serial_core.c linux-2.6.19.dev/drivers/serial/serial_core.c
---- linux-2.6.19.old/drivers/serial/serial_core.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/serial_core.c	2006-12-14 03:12:59.000000000 +0100
-@@ -2182,6 +2182,7 @@
- 
- 	normal->owner		= drv->owner;
- 	normal->driver_name	= drv->driver_name;
-+	normal->devfs_name	= drv->devfs_name;
- 	normal->name		= drv->dev_name;
- 	normal->major		= drv->major;
- 	normal->minor_start	= drv->minor;
-@@ -2189,7 +2190,7 @@
- 	normal->subtype		= SERIAL_TYPE_NORMAL;
- 	normal->init_termios	= tty_std_termios;
- 	normal->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
--	normal->flags		= TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-+	normal->flags		= TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
- 	normal->driver_state    = drv;
- 	tty_set_operations(normal, &uart_ops);
- 
-diff -urN linux-2.6.19.old/drivers/serial/serial_txx9.c linux-2.6.19.dev/drivers/serial/serial_txx9.c
---- linux-2.6.19.old/drivers/serial/serial_txx9.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/serial_txx9.c	2006-12-14 03:12:59.000000000 +0100
-@@ -68,10 +68,12 @@
- #if !defined(CONFIG_SERIAL_TXX9_STDSERIAL)
- /* "ttyS" is used for standard serial driver */
- #define TXX9_TTY_NAME "ttyTX"
-+#define TXX9_TTY_DEVFS_NAME "tttx/"
- #define TXX9_TTY_MINOR_START	(64 + 64)	/* ttyTX0(128), ttyTX1(129) */
- #else
- /* acts like standard serial driver */
- #define TXX9_TTY_NAME "ttyS"
-+#define TXX9_TTY_DEVFS_NAME "tts/"
- #define TXX9_TTY_MINOR_START	64
- #endif
- #define TXX9_TTY_MAJOR	TTY_MAJOR
-@@ -968,6 +970,7 @@
- static struct uart_driver serial_txx9_reg = {
- 	.owner			= THIS_MODULE,
- 	.driver_name		= "serial_txx9",
-+	.devfs_name		= TXX9_TTY_DEVFS_NAME,
- 	.dev_name		= TXX9_TTY_NAME,
- 	.major			= TXX9_TTY_MAJOR,
- 	.minor			= TXX9_TTY_MINOR_START,
-diff -urN linux-2.6.19.old/drivers/serial/sh-sci.c linux-2.6.19.dev/drivers/serial/sh-sci.c
---- linux-2.6.19.old/drivers/serial/sh-sci.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/sh-sci.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1320,6 +1320,9 @@
- static struct uart_driver sci_uart_driver = {
- 	.owner		= THIS_MODULE,
- 	.driver_name	= "sci",
-+#ifdef CONFIG_DEVFS_FS
-+	.devfs_name	= "ttsc/",
-+#endif
- 	.dev_name	= "ttySC",
- 	.major		= SCI_MAJOR,
- 	.minor		= SCI_MINOR_START,
-diff -urN linux-2.6.19.old/drivers/serial/sunhv.c linux-2.6.19.dev/drivers/serial/sunhv.c
---- linux-2.6.19.old/drivers/serial/sunhv.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/sunhv.c	2006-12-14 03:12:59.000000000 +0100
-@@ -353,6 +353,7 @@
- static struct uart_driver sunhv_reg = {
- 	.owner			= THIS_MODULE,
- 	.driver_name		= "serial",
-+	.devfs_name		= "tts/",
- 	.dev_name		= "ttyS",
- 	.major			= TTY_MAJOR,
- };
-diff -urN linux-2.6.19.old/drivers/serial/sunsab.c linux-2.6.19.dev/drivers/serial/sunsab.c
---- linux-2.6.19.old/drivers/serial/sunsab.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/sunsab.c	2006-12-14 03:12:59.000000000 +0100
-@@ -849,6 +849,7 @@
- static struct uart_driver sunsab_reg = {
- 	.owner			= THIS_MODULE,
- 	.driver_name		= "serial",
-+	.devfs_name		= "tts/",
- 	.dev_name		= "ttyS",
- 	.major			= TTY_MAJOR,
- };
-diff -urN linux-2.6.19.old/drivers/serial/sunsu.c linux-2.6.19.dev/drivers/serial/sunsu.c
---- linux-2.6.19.old/drivers/serial/sunsu.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/sunsu.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1175,6 +1175,7 @@
- static struct uart_driver sunsu_reg = {
- 	.owner			= THIS_MODULE,
- 	.driver_name		= "serial",
-+	.devfs_name		= "tts/",
- 	.dev_name		= "ttyS",
- 	.major			= TTY_MAJOR,
- };
-diff -urN linux-2.6.19.old/drivers/serial/sunzilog.c linux-2.6.19.dev/drivers/serial/sunzilog.c
---- linux-2.6.19.old/drivers/serial/sunzilog.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/sunzilog.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1006,6 +1006,7 @@
- static struct uart_driver sunzilog_reg = {
- 	.owner		=	THIS_MODULE,
- 	.driver_name	=	"ttyS",
-+	.devfs_name	=	"tts/",
- 	.dev_name	=	"ttyS",
- 	.major		=	TTY_MAJOR,
- };
-diff -urN linux-2.6.19.old/drivers/serial/v850e_uart.c linux-2.6.19.dev/drivers/serial/v850e_uart.c
---- linux-2.6.19.old/drivers/serial/v850e_uart.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/v850e_uart.c	2006-12-14 03:12:59.000000000 +0100
-@@ -468,6 +468,7 @@
- static struct uart_driver v850e_uart_driver = {
- 	.owner			= THIS_MODULE,
- 	.driver_name		= "v850e_uart",
-+	.devfs_name		= "tts/",
- 	.dev_name		= "ttyS",
- 	.major			= TTY_MAJOR,
- 	.minor			= V850E_UART_MINOR_BASE,
-diff -urN linux-2.6.19.old/drivers/serial/vr41xx_siu.c linux-2.6.19.dev/drivers/serial/vr41xx_siu.c
---- linux-2.6.19.old/drivers/serial/vr41xx_siu.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/serial/vr41xx_siu.c	2006-12-14 03:12:59.000000000 +0100
-@@ -910,6 +910,7 @@
- 	.owner		= THIS_MODULE,
- 	.driver_name	= "SIU",
- 	.dev_name	= "ttyVR",
-+	.devfs_name	= "ttvr/",
- 	.major		= SIU_MAJOR,
- 	.minor		= SIU_MINOR_BASE,
- 	.cons		= SERIAL_VR41XX_CONSOLE,
-diff -urN linux-2.6.19.old/drivers/tc/zs.c linux-2.6.19.dev/drivers/tc/zs.c
---- linux-2.6.19.old/drivers/tc/zs.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/tc/zs.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1744,6 +1744,7 @@
- 	/* Not all of this is exactly right for us. */
- 
- 	serial_driver->owner = THIS_MODULE;
-+	serial_driver->devfs_name = "tts/";
- 	serial_driver->name = "ttyS";
- 	serial_driver->major = TTY_MAJOR;
- 	serial_driver->minor_start = 64;
-@@ -1752,7 +1753,7 @@
- 	serial_driver->init_termios = tty_std_termios;
- 	serial_driver->init_termios.c_cflag =
- 		B9600 | CS8 | CREAD | HUPCL | CLOCAL;
--	serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-+	serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
- 	tty_set_operations(serial_driver, &serial_ops);
- 
- 	if (tty_register_driver(serial_driver))
-diff -urN linux-2.6.19.old/drivers/telephony/phonedev.c linux-2.6.19.dev/drivers/telephony/phonedev.c
---- linux-2.6.19.old/drivers/telephony/phonedev.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/telephony/phonedev.c	2006-12-14 03:12:59.000000000 +0100
-@@ -28,6 +28,7 @@
- 
- #include <linux/kmod.h>
- #include <linux/sem.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/mutex.h>
- 
- #define PHONE_NUM_DEVICES	256
-@@ -105,6 +106,8 @@
- 		if (phone_device[i] == NULL) {
- 			phone_device[i] = p;
- 			p->minor = i;
-+			devfs_mk_cdev(MKDEV(PHONE_MAJOR,i),
-+				S_IFCHR|S_IRUSR|S_IWUSR, "phone/%d", i);
- 			mutex_unlock(&phone_lock);
- 			return 0;
- 		}
-@@ -122,6 +125,7 @@
- 	mutex_lock(&phone_lock);
- 	if (phone_device[pfd->minor] != pfd)
- 		panic("phone: bad unregister");
-+	devfs_remove("phone/%d", pfd->minor);
- 	phone_device[pfd->minor] = NULL;
- 	mutex_unlock(&phone_lock);
- }
-diff -urN linux-2.6.19.old/drivers/usb/class/cdc-acm.c linux-2.6.19.dev/drivers/usb/class/cdc-acm.c
---- linux-2.6.19.old/drivers/usb/class/cdc-acm.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/usb/class/cdc-acm.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1151,11 +1151,12 @@
- 	acm_tty_driver->owner = THIS_MODULE,
- 	acm_tty_driver->driver_name = "acm",
- 	acm_tty_driver->name = "ttyACM",
-+	acm_tty_driver->devfs_name = "usb/acm/",
- 	acm_tty_driver->major = ACM_TTY_MAJOR,
- 	acm_tty_driver->minor_start = 0,
- 	acm_tty_driver->type = TTY_DRIVER_TYPE_SERIAL,
- 	acm_tty_driver->subtype = SERIAL_TYPE_NORMAL,
--	acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-+	acm_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS,
- 	acm_tty_driver->init_termios = tty_std_termios;
- 	acm_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- 	tty_set_operations(acm_tty_driver, &acm_ops);
-diff -urN linux-2.6.19.old/drivers/usb/gadget/serial.c linux-2.6.19.dev/drivers/usb/gadget/serial.c
---- linux-2.6.19.old/drivers/usb/gadget/serial.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/usb/gadget/serial.c	2006-12-14 03:12:59.000000000 +0100
-@@ -587,11 +587,12 @@
- 	gs_tty_driver->owner = THIS_MODULE;
- 	gs_tty_driver->driver_name = GS_SHORT_NAME;
- 	gs_tty_driver->name = "ttygs";
-+	gs_tty_driver->devfs_name = "usb/ttygs/";
- 	gs_tty_driver->major = GS_MAJOR;
- 	gs_tty_driver->minor_start = GS_MINOR_START;
- 	gs_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
- 	gs_tty_driver->subtype = SERIAL_TYPE_NORMAL;
--	gs_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-+	gs_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
- 	gs_tty_driver->init_termios = tty_std_termios;
- 	gs_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- 	tty_set_operations(gs_tty_driver, &gs_tty_ops);
-diff -urN linux-2.6.19.old/drivers/usb/serial/usb-serial.c linux-2.6.19.dev/drivers/usb/serial/usb-serial.c
---- linux-2.6.19.old/drivers/usb/serial/usb-serial.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/usb/serial/usb-serial.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1055,12 +1055,13 @@
- 
- 	usb_serial_tty_driver->owner = THIS_MODULE;
- 	usb_serial_tty_driver->driver_name = "usbserial";
-+	usb_serial_tty_driver->devfs_name = "usb/tts/";
- 	usb_serial_tty_driver->name = 	"ttyUSB";
- 	usb_serial_tty_driver->major = SERIAL_TTY_MAJOR;
- 	usb_serial_tty_driver->minor_start = 0;
- 	usb_serial_tty_driver->type = TTY_DRIVER_TYPE_SERIAL;
- 	usb_serial_tty_driver->subtype = SERIAL_TYPE_NORMAL;
--	usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-+	usb_serial_tty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
- 	usb_serial_tty_driver->init_termios = tty_std_termios;
- 	usb_serial_tty_driver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- 	tty_set_operations(usb_serial_tty_driver, &serial_ops);
-diff -urN linux-2.6.19.old/drivers/video/fbmem.c linux-2.6.19.dev/drivers/video/fbmem.c
---- linux-2.6.19.old/drivers/video/fbmem.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/drivers/video/fbmem.c	2006-12-14 03:12:59.000000000 +0100
-@@ -31,6 +31,7 @@
- #ifdef CONFIG_KMOD
- #include <linux/kmod.h>
- #endif
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/err.h>
- #include <linux/device.h>
- #include <linux/efi.h>
-@@ -1324,6 +1325,8 @@
- 	fb_add_videomode(&mode, &fb_info->modelist);
- 	registered_fb[i] = fb_info;
- 
-+	devfs_mk_cdev(MKDEV(FB_MAJOR, i),
-+			S_IFCHR | S_IRUGO | S_IWUGO, "fb/%d", i);
- 	event.info = fb_info;
- 	fb_notifier_call_chain(FB_EVENT_FB_REGISTERED, &event);
- 	return 0;
-@@ -1349,6 +1352,7 @@
- 	i = fb_info->node;
- 	if (!registered_fb[i])
- 		return -EINVAL;
-+	devfs_remove("fb/%d", i);
- 
- 	if (fb_info->pixmap.addr &&
- 	    (fb_info->pixmap.flags & FB_PIXMAP_DEFAULT))
-@@ -1400,6 +1404,7 @@
- {
- 	create_proc_read_entry("fb", 0, NULL, fbmem_read_proc, NULL);
- 
-+	devfs_mk_dir("fb");
- 	if (register_chrdev(FB_MAJOR,"fb",&fb_fops))
- 		printk("unable to get major %d for fb devs\n", FB_MAJOR);
- 
-diff -urN linux-2.6.19.old/fs/block_dev.c linux-2.6.19.dev/fs/block_dev.c
---- linux-2.6.19.old/fs/block_dev.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/fs/block_dev.c	2006-12-14 03:12:59.000000000 +0100
-@@ -11,6 +11,7 @@
- #include <linux/slab.h>
- #include <linux/kmod.h>
- #include <linux/major.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/smp_lock.h>
- #include <linux/highmem.h>
- #include <linux/blkdev.h>
-diff -urN linux-2.6.19.old/fs/char_dev.c linux-2.6.19.dev/fs/char_dev.c
---- linux-2.6.19.old/fs/char_dev.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/fs/char_dev.c	2006-12-14 03:12:59.000000000 +0100
-@@ -13,6 +13,7 @@
- #include <linux/errno.h>
- #include <linux/module.h>
- #include <linux/smp_lock.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/seq_file.h>
- 
- #include <linux/kobject.h>
-diff -urN linux-2.6.19.old/fs/coda/psdev.c linux-2.6.19.dev/fs/coda/psdev.c
---- linux-2.6.19.old/fs/coda/psdev.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/fs/coda/psdev.c	2006-12-14 03:12:59.000000000 +0100
-@@ -28,6 +28,7 @@
- #include <linux/delay.h>
- #include <linux/skbuff.h>
- #include <linux/proc_fs.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/vmalloc.h>
- #include <linux/fs.h>
- #include <linux/file.h>
-@@ -364,12 +365,22 @@
- 		err = PTR_ERR(coda_psdev_class);
- 		goto out_chrdev;
- 	}		
--	for (i = 0; i < MAX_CODADEVS; i++)
-+	devfs_mk_dir ("coda");
-+	for (i = 0; i < MAX_CODADEVS; i++) {
- 		class_device_create(coda_psdev_class, NULL,
- 				MKDEV(CODA_PSDEV_MAJOR,i), NULL, "cfs%d", i);
-+		err = devfs_mk_cdev(MKDEV(CODA_PSDEV_MAJOR, i),
-+				S_IFCHR|S_IRUSR|S_IWUSR, "coda/%d", i);
-+		if (err)
-+			goto out_class;
-+	}
- 	coda_sysctl_init();
- 	goto out;
- 
-+out_class:
-+	for (i = 0; i < MAX_CODADEVS; i++) 
-+		class_device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i));
-+	class_destroy(coda_psdev_class);
- out_chrdev:
- 	unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
- out:
-@@ -408,9 +419,12 @@
- 	}
- 	return 0;
- out:
--	for (i = 0; i < MAX_CODADEVS; i++)
-+	for (i = 0; i < MAX_CODADEVS; i++) {
- 		class_device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i));
-+		devfs_remove("coda/%d", i);
-+	}
- 	class_destroy(coda_psdev_class);
-+	devfs_remove("coda");
- 	unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
- 	coda_sysctl_clean();
- out1:
-@@ -427,9 +441,12 @@
-         if ( err != 0 ) {
-                 printk("coda: failed to unregister filesystem\n");
-         }
--	for (i = 0; i < MAX_CODADEVS; i++)
-+	for (i = 0; i < MAX_CODADEVS; i++) {
- 		class_device_destroy(coda_psdev_class, MKDEV(CODA_PSDEV_MAJOR, i));
-+		devfs_remove("coda/%d", i);
-+	}
- 	class_destroy(coda_psdev_class);
-+	devfs_remove("coda");
- 	unregister_chrdev(CODA_PSDEV_MAJOR, "coda");
- 	coda_sysctl_clean();
- 	coda_destroy_inodecache();
-diff -urN linux-2.6.19.old/fs/compat_ioctl.c linux-2.6.19.dev/fs/compat_ioctl.c
---- linux-2.6.19.old/fs/compat_ioctl.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/fs/compat_ioctl.c	2006-12-14 03:12:59.000000000 +0100
-@@ -42,6 +42,7 @@
- #include <linux/cdrom.h>
- #include <linux/auto_fs.h>
- #include <linux/auto_fs4.h>
-+#include <linux/devfs_fs.h>
- #include <linux/tty.h>
- #include <linux/vt_kern.h>
- #include <linux/fb.h>
-diff -urN linux-2.6.19.old/fs/devfs/base.c linux-2.6.19.dev/fs/devfs/base.c
---- linux-2.6.19.old/fs/devfs/base.c	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.19.dev/fs/devfs/base.c	2006-12-14 03:12:59.000000000 +0100
-@@ -0,0 +1,2835 @@
-+/*  devfs (Device FileSystem) driver.
-+
-+    Copyright (C) 1998-2002  Richard Gooch
-+
-+    This library is free software; you can redistribute it and/or
-+    modify it under the terms of the GNU Library General Public
-+    License as published by the Free Software Foundation; either
-+    version 2 of the License, or (at your option) any later version.
-+
-+    This library is distributed in the hope that it will be useful,
-+    but WITHOUT ANY WARRANTY; without even the implied warranty of
-+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-+    Library General Public License for more details.
-+
-+    You should have received a copy of the GNU Library General Public
-+    License along with this library; if not, write to the Free
-+    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+
-+    Richard Gooch may be reached by email at  rgooch@atnf.csiro.au
-+    The postal address is:
-+      Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
-+
-+    ChangeLog
-+
-+    19980110   Richard Gooch <rgooch@atnf.csiro.au>
-+               Original version.
-+  v0.1
-+    19980111   Richard Gooch <rgooch@atnf.csiro.au>
-+               Created per-fs inode table rather than using inode->u.generic_ip
-+  v0.2
-+    19980111   Richard Gooch <rgooch@atnf.csiro.au>
-+               Created .epoch inode which has a ctime of 0.
-+	       Fixed loss of named pipes when dentries lost.
-+	       Fixed loss of inode data when devfs_register() follows mknod().
-+  v0.3
-+    19980111   Richard Gooch <rgooch@atnf.csiro.au>
-+               Fix for when compiling with CONFIG_KERNELD.
-+    19980112   Richard Gooch <rgooch@atnf.csiro.au>
-+               Fix for readdir() which sometimes didn't show entries.
-+	       Added <<tolerant>> option to <devfs_register>.
-+  v0.4
-+    19980113   Richard Gooch <rgooch@atnf.csiro.au>
-+               Created <devfs_fill_file> function.
-+  v0.5
-+    19980115   Richard Gooch <rgooch@atnf.csiro.au>
-+               Added subdirectory support. Major restructuring.
-+    19980116   Richard Gooch <rgooch@atnf.csiro.au>
-+               Fixed <find_by_dev> to not search major=0,minor=0.
-+	       Added symlink support.
-+  v0.6
-+    19980120   Richard Gooch <rgooch@atnf.csiro.au>
-+               Created <devfs_mk_dir> function and support directory unregister
-+    19980120   Richard Gooch <rgooch@atnf.csiro.au>
-+               Auto-ownership uses real uid/gid rather than effective uid/gid.
-+  v0.7
-+    19980121   Richard Gooch <rgooch@atnf.csiro.au>
-+               Supported creation of sockets.
-+  v0.8
-+    19980122   Richard Gooch <rgooch@atnf.csiro.au>
-+               Added DEVFS_FL_HIDE_UNREG flag.
-+	       Interface change to <devfs_mk_symlink>.
-+               Created <devfs_symlink> to support symlink(2).
-+  v0.9
-+    19980123   Richard Gooch <rgooch@atnf.csiro.au>
-+               Added check to <devfs_fill_file> to check inode is in devfs.
-+	       Added optional traversal of symlinks.
-+  v0.10
-+    19980124   Richard Gooch <rgooch@atnf.csiro.au>
-+               Created <devfs_get_flags> and <devfs_set_flags>.
-+  v0.11
-+    19980125   C. Scott Ananian <cananian@alumni.princeton.edu>
-+               Created <devfs_find_handle>.
-+    19980125   Richard Gooch <rgooch@atnf.csiro.au>
-+               Allow removal of symlinks.
-+  v0.12
-+    19980125   Richard Gooch <rgooch@atnf.csiro.au>
-+               Created <devfs_set_symlink_destination>.
-+    19980126   Richard Gooch <rgooch@atnf.csiro.au>
-+               Moved DEVFS_SUPER_MAGIC into header file.
-+	       Added DEVFS_FL_HIDE flag.
-+	       Created <devfs_get_maj_min>.
-+	       Created <devfs_get_handle_from_inode>.
-+	       Fixed minor bug in <find_by_dev>.
-+    19980127   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Changed interface to <find_by_dev>, <find_entry>,
-+	       <devfs_unregister>, <devfs_fill_file> and <devfs_find_handle>.
-+	       Fixed inode times when symlink created with symlink(2).
-+  v0.13
-+    19980129   C. Scott Ananian <cananian@alumni.princeton.edu>
-+               Exported <devfs_set_symlink_destination>, <devfs_get_maj_min>
-+	       and <devfs_get_handle_from_inode>.
-+    19980129   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Created <devfs_unlink> to support unlink(2).
-+  v0.14
-+    19980129   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed kerneld support for entries in devfs subdirectories.
-+    19980130   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Bugfixes in <call_kerneld>.
-+  v0.15
-+    19980207   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Call kerneld when looking up unregistered entries.
-+  v0.16
-+    19980326   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Modified interface to <devfs_find_handle> for symlink traversal.
-+  v0.17
-+    19980331   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed persistence bug with device numbers for manually created
-+	       device files.
-+	       Fixed problem with recreating symlinks with different content.
-+  v0.18
-+    19980401   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Changed to CONFIG_KMOD.
-+	       Hide entries which are manually unlinked.
-+	       Always invalidate devfs dentry cache when registering entries.
-+	       Created <devfs_rmdir> to support rmdir(2).
-+	       Ensure directories created by <devfs_mk_dir> are visible.
-+  v0.19
-+    19980402   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Invalidate devfs dentry cache when making directories.
-+	       Invalidate devfs dentry cache when removing entries.
-+	       Fixed persistence bug with fifos.
-+  v0.20
-+    19980421   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Print process command when debugging kerneld/kmod.
-+	       Added debugging for register/unregister/change operations.
-+    19980422   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added "devfs=" boot options.
-+  v0.21
-+    19980426   Richard Gooch <rgooch@atnf.csiro.au>
-+	       No longer lock/unlock superblock in <devfs_put_super>.
-+	       Drop negative dentries when they are released.
-+	       Manage dcache more efficiently.
-+  v0.22
-+    19980427   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added DEVFS_FL_AUTO_DEVNUM flag.
-+  v0.23
-+    19980430   Richard Gooch <rgooch@atnf.csiro.au>
-+	       No longer set unnecessary methods.
-+  v0.24
-+    19980504   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added PID display to <call_kerneld> debugging message.
-+	       Added "after" debugging message to <call_kerneld>.
-+    19980519   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added "diread" and "diwrite" boot options.
-+    19980520   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed persistence problem with permissions.
-+  v0.25
-+    19980602   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Support legacy device nodes.
-+	       Fixed bug where recreated inodes were hidden.
-+  v0.26
-+    19980602   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Improved debugging in <get_vfs_inode>.
-+    19980607   Richard Gooch <rgooch@atnf.csiro.au>
-+	       No longer free old dentries in <devfs_mk_dir>.
-+	       Free all dentries for a given entry when deleting inodes.
-+  v0.27
-+    19980627   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Limit auto-device numbering to majors 128 to 239.
-+  v0.28
-+    19980629   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed inode times persistence problem.
-+  v0.29
-+    19980704   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed spelling in <devfs_readlink> debug.
-+	       Fixed bug in <devfs_setup> parsing "dilookup".
-+  v0.30
-+    19980705   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed devfs inode leak when manually recreating inodes.
-+	       Fixed permission persistence problem when recreating inodes.
-+  v0.31
-+    19980727   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Removed harmless "unused variable" compiler warning.
-+	       Fixed modes for manually recreated device nodes.
-+  v0.32
-+    19980728   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added NULL devfs inode warning in <devfs_read_inode>.
-+	       Force all inode nlink values to 1.
-+  v0.33
-+    19980730   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added "dimknod" boot option.
-+	       Set inode nlink to 0 when freeing dentries.
-+	       Fixed modes for manually recreated symlinks.
-+  v0.34
-+    19980802   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed bugs in recreated directories and symlinks.
-+  v0.35
-+    19980806   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed bugs in recreated device nodes.
-+    19980807   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed bug in currently unused <devfs_get_handle_from_inode>.
-+	       Defined new <devfs_handle_t> type.
-+	       Improved debugging when getting entries.
-+	       Fixed bug where directories could be emptied.
-+  v0.36
-+    19980809   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Replaced dummy .epoch inode with .devfsd character device.
-+    19980810   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Implemented devfsd protocol revision 0.
-+  v0.37
-+    19980819   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added soothing message to warning in <devfs_d_iput>.
-+  v0.38
-+    19980829   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Use GCC extensions for structure initialisations.
-+	       Implemented async open notification.
-+	       Incremented devfsd protocol revision to 1.
-+  v0.39
-+    19980908   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Moved async open notification to end of <devfs_open>.
-+  v0.40
-+    19980910   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Prepended "/dev/" to module load request.
-+	       Renamed <call_kerneld> to <call_kmod>.
-+  v0.41
-+    19980910   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed typo "AYSNC" -> "ASYNC".
-+  v0.42
-+    19980910   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added open flag for files.
-+  v0.43
-+    19980927   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Set i_blocks=0 and i_blksize=1024 in <devfs_read_inode>.
-+  v0.44
-+    19981005   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added test for empty <<name>> in <devfs_find_handle>.
-+	       Renamed <generate_path> to <devfs_generate_path> and published.
-+  v0.45
-+    19981006   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Created <devfs_get_fops>.
-+  v0.46
-+    19981007   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Limit auto-device numbering to majors 144 to 239.
-+  v0.47
-+    19981010   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Updated <devfs_follow_link> for VFS change in 2.1.125.
-+  v0.48
-+    19981022   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Created DEVFS_ FL_COMPAT flag.
-+  v0.49
-+    19981023   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Created "nocompat" boot option.
-+  v0.50
-+    19981025   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Replaced "mount" boot option with "nomount".
-+  v0.51
-+    19981110   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Created "only" boot option.
-+  v0.52
-+    19981112   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added DEVFS_FL_REMOVABLE flag.
-+  v0.53
-+    19981114   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Only call <scan_dir_for_removable> on first call to
-+	       <devfs_readdir>.
-+  v0.54
-+    19981205   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Updated <devfs_rmdir> for VFS change in 2.1.131.
-+  v0.55
-+    19981218   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Created <devfs_mk_compat>.
-+    19981220   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Check for partitions on removable media in <devfs_lookup>.
-+  v0.56
-+    19990118   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added support for registering regular files.
-+	       Created <devfs_set_file_size>.
-+	       Update devfs inodes from entries if not changed through FS.
-+  v0.57
-+    19990124   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed <devfs_fill_file> to only initialise temporary inodes.
-+	       Trap for NULL fops in <devfs_register>.
-+	       Return -ENODEV in <devfs_fill_file> for non-driver inodes.
-+  v0.58
-+    19990126   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Switched from PATH_MAX to DEVFS_PATHLEN.
-+  v0.59
-+    19990127   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Created "nottycompat" boot option.
-+  v0.60
-+    19990318   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed <devfsd_read> to not overrun event buffer.
-+  v0.61
-+    19990329   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Created <devfs_auto_unregister>.
-+  v0.62
-+    19990330   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Don't return unregistred entries in <devfs_find_handle>.
-+	       Panic in <devfs_unregister> if entry unregistered.
-+    19990401   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Don't panic in <devfs_auto_unregister> for duplicates.
-+  v0.63
-+    19990402   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Don't unregister already unregistered entries in <unregister>.
-+  v0.64
-+    19990510   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Disable warning messages when unable to read partition table for
-+	       removable media.
-+  v0.65
-+    19990512   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Updated <devfs_lookup> for VFS change in 2.3.1-pre1.
-+	       Created "oops-on-panic" boot option.
-+	       Improved debugging in <devfs_register> and <devfs_unregister>.
-+  v0.66
-+    19990519   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added documentation for some functions.
-+    19990525   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Removed "oops-on-panic" boot option: now always Oops.
-+  v0.67
-+    19990531   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Improved debugging in <devfs_register>.
-+  v0.68
-+    19990604   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added "diunlink" and "nokmod" boot options.
-+	       Removed superfluous warning message in <devfs_d_iput>.
-+  v0.69
-+    19990611   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Took account of change to <d_alloc_root>.
-+  v0.70
-+    19990614   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Created separate event queue for each mounted devfs.
-+	       Removed <devfs_invalidate_dcache>.
-+	       Created new ioctl()s.
-+	       Incremented devfsd protocol revision to 3.
-+	       Fixed bug when re-creating directories: contents were lost.
-+	       Block access to inodes until devfsd updates permissions.
-+    19990615   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Support 2.2.x kernels.
-+  v0.71
-+    19990623   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Switched to sending process uid/gid to devfsd.
-+	       Renamed <call_kmod> to <try_modload>.
-+	       Added DEVFSD_NOTIFY_LOOKUP event.
-+    19990624   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added DEVFSD_NOTIFY_CHANGE event.
-+	       Incremented devfsd protocol revision to 4.
-+  v0.72
-+    19990713   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Return EISDIR rather than EINVAL for read(2) on directories.
-+  v0.73
-+    19990809   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Changed <devfs_setup> to new __init scheme.
-+  v0.74
-+    19990901   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Changed remaining function declarations to new __init scheme.
-+  v0.75
-+    19991013   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Created <devfs_get_info>, <devfs_set_info>,
-+	       <devfs_get_first_child> and <devfs_get_next_sibling>.
-+	       Added <<dir>> parameter to <devfs_register>, <devfs_mk_compat>,
-+	       <devfs_mk_dir> and <devfs_find_handle>.
-+	       Work sponsored by SGI.
-+  v0.76
-+    19991017   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Allow multiple unregistrations.
-+	       Work sponsored by SGI.
-+  v0.77
-+    19991026   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added major and minor number to devfsd protocol.
-+	       Incremented devfsd protocol revision to 5.
-+	       Work sponsored by SGI.
-+  v0.78
-+    19991030   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Support info pointer for all devfs entry types.
-+	       Added <<info>> parameter to <devfs_mk_dir> and
-+	       <devfs_mk_symlink>.
-+	       Work sponsored by SGI.
-+  v0.79
-+    19991031   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Support "../" when searching devfs namespace.
-+	       Work sponsored by SGI.
-+  v0.80
-+    19991101   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Created <devfs_get_unregister_slave>.
-+	       Work sponsored by SGI.
-+  v0.81
-+    19991103   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Exported <devfs_get_parent>.
-+	       Work sponsored by SGI.
-+  v0.82
-+    19991104   Richard Gooch <rgooch@atnf.csiro.au>
-+               Removed unused <devfs_set_symlink_destination>.
-+    19991105   Richard Gooch <rgooch@atnf.csiro.au>
-+               Do not hide entries from devfsd or children.
-+	       Removed DEVFS_ FL_TTY_COMPAT flag.
-+	       Removed "nottycompat" boot option.
-+	       Removed <devfs_mk_compat>.
-+	       Work sponsored by SGI.
-+  v0.83
-+    19991107   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added DEVFS_FL_WAIT flag.
-+	       Work sponsored by SGI.
-+  v0.84
-+    19991107   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Support new "disc" naming scheme in <get_removable_partition>.
-+	       Allow NULL fops in <devfs_register>.
-+	       Work sponsored by SGI.
-+  v0.85
-+    19991110   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fall back to major table if NULL fops given to <devfs_register>.
-+	       Work sponsored by SGI.
-+  v0.86
-+    19991204   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Support fifos when unregistering.
-+	       Work sponsored by SGI.
-+  v0.87
-+    19991209   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Removed obsolete DEVFS_ FL_COMPAT and DEVFS_ FL_TOLERANT flags.
-+	       Work sponsored by SGI.
-+  v0.88
-+    19991214   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Removed kmod support.
-+	       Work sponsored by SGI.
-+  v0.89
-+    19991216   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Improved debugging in <get_vfs_inode>.
-+	       Ensure dentries created by devfsd will be cleaned up.
-+	       Work sponsored by SGI.
-+  v0.90
-+    19991223   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Created <devfs_get_name>.
-+	       Work sponsored by SGI.
-+  v0.91
-+    20000203   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Ported to kernel 2.3.42.
-+	       Removed <devfs_fill_file>.
-+	       Work sponsored by SGI.
-+  v0.92
-+    20000306   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added DEVFS_ FL_NO_PERSISTENCE flag.
-+	       Removed unnecessary call to <update_devfs_inode_from_entry> in
-+	       <devfs_readdir>.
-+	       Work sponsored by SGI.
-+  v0.93
-+    20000413   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Set inode->i_size to correct size for symlinks.
-+    20000414   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Only give lookup() method to directories to comply with new VFS
-+	       assumptions.
-+	       Work sponsored by SGI.
-+    20000415   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Remove unnecessary tests in symlink methods.
-+	       Don't kill existing block ops in <devfs_read_inode>.
-+	       Work sponsored by SGI.
-+  v0.94
-+    20000424   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Don't create missing directories in <devfs_find_handle>.
-+	       Work sponsored by SGI.
-+  v0.95
-+    20000430   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added CONFIG_DEVFS_MOUNT.
-+	       Work sponsored by SGI.
-+  v0.96
-+    20000608   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Disabled multi-mount capability (use VFS bindings instead).
-+	       Work sponsored by SGI.
-+  v0.97
-+    20000610   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Switched to FS_SINGLE to disable multi-mounts.
-+    20000612   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Removed module support.
-+	       Removed multi-mount code.
-+	       Removed compatibility macros: VFS has changed too much.
-+	       Work sponsored by SGI.
-+  v0.98
-+    20000614   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Merged devfs inode into devfs entry.
-+	       Work sponsored by SGI.
-+  v0.99
-+    20000619   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Removed dead code in <devfs_register> which used to call
-+	       <free_dentries>.
-+	       Work sponsored by SGI.
-+  v0.100
-+    20000621   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Changed interface to <devfs_register>.
-+	       Work sponsored by SGI.
-+  v0.101
-+    20000622   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Simplified interface to <devfs_mk_symlink> and <devfs_mk_dir>.
-+	       Simplified interface to <devfs_find_handle>.
-+	       Work sponsored by SGI.
-+  v0.102
-+    20010519   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Ensure <devfs_generate_path> terminates string for root entry.
-+	       Exported <devfs_get_name> to modules.
-+    20010520   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Make <devfs_mk_symlink> send events to devfsd.
-+	       Cleaned up option processing in <devfs_setup>.
-+    20010521   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed bugs in handling symlinks: could leak or cause Oops.
-+    20010522   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Cleaned up directory handling by separating fops.
-+  v0.103
-+    20010601   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed handling of inverted options in <devfs_setup>.
-+  v0.104
-+    20010604   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Adjusted <try_modload> to account for <devfs_generate_path> fix.
-+  v0.105
-+    20010617   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Answered question posed by Al Viro and removed his comments.
-+	       Moved setting of registered flag after other fields are changed.
-+	       Fixed race between <devfsd_close> and <devfsd_notify_one>.
-+	       Global VFS changes added bogus BKL to <devfsd_close>: removed.
-+	       Widened locking in <devfs_readlink> and <devfs_follow_link>.
-+	       Replaced <devfsd_read> stack usage with <devfsd_ioctl> kmalloc.
-+	       Simplified locking in <devfsd_ioctl> and fixed memory leak.
-+  v0.106
-+    20010709   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Removed broken devnum allocation and use <devfs_alloc_devnum>.
-+	       Fixed old devnum leak by calling new <devfs_dealloc_devnum>.
-+  v0.107
-+    20010712   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed bug in <devfs_setup> which could hang boot process.
-+  v0.108
-+    20010730   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added DEVFSD_NOTIFY_DELETE event.
-+    20010801   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Removed #include <asm/segment.h>.
-+  v0.109
-+    20010807   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed inode table races by removing it and using
-+	       inode->u.generic_ip instead.
-+	       Moved <devfs_read_inode> into <get_vfs_inode>.
-+	       Moved <devfs_write_inode> into <devfs_notify_change>.
-+  v0.110
-+    20010808   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed race in <devfs_do_symlink> for uni-processor.
-+  v0.111
-+    20010818   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Removed remnant of multi-mount support in <devfs_mknod>.
-+               Removed unused DEVFS_FL_SHOW_UNREG flag.
-+  v0.112
-+    20010820   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Removed nlink field from struct devfs_inode.
-+  v0.113
-+    20010823   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Replaced BKL with global rwsem to protect symlink data (quick
-+	       and dirty hack).
-+  v0.114
-+    20010827   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Replaced global rwsem for symlink with per-link refcount.
-+  v0.115
-+    20010919   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Set inode->i_mapping->a_ops for block nodes in <get_vfs_inode>.
-+  v0.116
-+    20011008   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed overrun in <devfs_link> by removing function (not needed).
-+    20011009   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed buffer underrun in <try_modload>.
-+    20011029   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed race in <devfsd_ioctl> when setting event mask.
-+    20011114   Richard Gooch <rgooch@atnf.csiro.au>
-+	       First release of new locking code.
-+  v1.0
-+    20011117   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Discard temporary buffer, now use "%s" for dentry names.
-+    20011118   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Don't generate path in <try_modload>: use fake entry instead.
-+	       Use "existing" directory in <_devfs_make_parent_for_leaf>.
-+    20011122   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Use slab cache rather than fixed buffer for devfsd events.
-+  v1.1
-+    20011125   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Send DEVFSD_NOTIFY_REGISTERED events in <devfs_mk_dir>.
-+    20011127   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed locking bug in <devfs_d_revalidate_wait> due to typo.
-+	       Do not send CREATE, CHANGE, ASYNC_OPEN or DELETE events from
-+	       devfsd or children.
-+  v1.2
-+    20011202   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed bug in <devfsd_read>: was dereferencing freed pointer.
-+  v1.3
-+    20011203   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed bug in <devfsd_close>: was dereferencing freed pointer.
-+	       Added process group check for devfsd privileges.
-+  v1.4
-+    20011204   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Use SLAB_ATOMIC in <devfsd_notify_de> from <devfs_d_delete>.
-+  v1.5
-+    20011211   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Return old entry in <devfs_mk_dir> for 2.4.x kernels.
-+    20011212   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Increment refcount on module in <check_disc_changed>.
-+    20011215   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Created <devfs_get_handle> and exported <devfs_put>.
-+	       Increment refcount on module in <devfs_get_ops>.
-+	       Created <devfs_put_ops>.
-+  v1.6
-+    20011216   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added poisoning to <devfs_put>.
-+	       Improved debugging messages.
-+  v1.7
-+    20011221   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Corrected (made useful) debugging message in <unregister>.
-+	       Moved <kmem_cache_create> in <mount_devfs_fs> to <init_devfs_fs>
-+    20011224   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added magic number to guard against scribbling drivers.
-+    20011226   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Only return old entry in <devfs_mk_dir> if a directory.
-+	       Defined macros for error and debug messages.
-+  v1.8
-+    20020113   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed (rare, old) race in <devfs_lookup>.
-+  v1.9
-+    20020120   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed deadlock bug in <devfs_d_revalidate_wait>.
-+	       Tag VFS deletable in <devfs_mk_symlink> if handle ignored.
-+  v1.10
-+    20020129   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added KERN_* to remaining messages.
-+	       Cleaned up declaration of <stat_read>.
-+  v1.11
-+    20020219   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Changed <devfs_rmdir> to allow later additions if not yet empty.
-+  v1.12
-+    20020406   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Removed silently introduced calls to lock_kernel() and
-+	       unlock_kernel() due to recent VFS locking changes. BKL isn't
-+	       required in devfs.
-+  v1.13
-+    20020428   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Removed 2.4.x compatibility code.
-+  v1.14
-+    20020510   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Added BKL to <devfs_open> because drivers still need it.
-+  v1.15
-+    20020512   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Protected <scan_dir_for_removable> and <get_removable_partition>
-+	       from changing directory contents.
-+  v1.16
-+    20020514   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Minor cleanup of <scan_dir_for_removable>.
-+  v1.17
-+    20020721   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Switched to ISO C structure field initialisers.
-+	       Switch to set_current_state() and move before add_wait_queue().
-+    20020722   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed devfs entry leak in <devfs_readdir> when *readdir fails.
-+  v1.18
-+    20020725   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Created <devfs_find_and_unregister>.
-+  v1.19
-+    20020728   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Removed deprecated <devfs_find_handle>.
-+  v1.20
-+    20020820   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Fixed module unload race in <devfs_open>.
-+  v1.21
-+    20021013   Richard Gooch <rgooch@atnf.csiro.au>
-+	       Removed DEVFS_ FL_AUTO_OWNER.
-+	       Switched lingering structure field initialiser to ISO C.
-+	       Added locking when updating FCB flags.
-+  v1.22
-+*/
-+#include <linux/types.h>
-+#include <linux/errno.h>
-+#include <linux/time.h>
-+#include <linux/tty.h>
-+#include <linux/timer.h>
-+#include <linux/autoconf.h>
-+#include <linux/kernel.h>
-+#include <linux/wait.h>
-+#include <linux/string.h>
-+#include <linux/slab.h>
-+#include <linux/ioport.h>
-+#include <linux/delay.h>
-+#include <linux/ctype.h>
-+#include <linux/mm.h>
-+#include <linux/module.h>
-+#include <linux/init.h>
-+#include <linux/devfs_fs.h>
-+#include <linux/devfs_fs_kernel.h>
-+#include <linux/smp_lock.h>
-+#include <linux/smp.h>
-+#include <linux/rwsem.h>
-+#include <linux/sched.h>
-+#include <linux/namei.h>
-+#include <linux/bitops.h>
-+
-+#include <asm/uaccess.h>
-+#include <asm/io.h>
-+#include <asm/processor.h>
-+#include <asm/system.h>
-+#include <asm/pgtable.h>
-+#include <asm/atomic.h>
-+
-+#define DEVFS_VERSION            "2004-01-31"
-+
-+#define DEVFS_NAME "devfs"
-+
-+#define FIRST_INODE 1
-+
-+#define STRING_LENGTH 256
-+#define FAKE_BLOCK_SIZE 1024
-+#define POISON_PTR ( *(void **) poison_array )
-+#define MAGIC_VALUE 0x327db823
-+
-+#ifndef TRUE
-+#  define TRUE 1
-+#  define FALSE 0
-+#endif
-+
-+#define MODE_DIR (S_IFDIR | S_IWUSR | S_IRUGO | S_IXUGO)
-+
-+#define DEBUG_NONE         0x0000000
-+#define DEBUG_MODULE_LOAD  0x0000001
-+#define DEBUG_REGISTER     0x0000002
-+#define DEBUG_UNREGISTER   0x0000004
-+#define DEBUG_FREE         0x0000008
-+#define DEBUG_SET_FLAGS    0x0000010
-+#define DEBUG_S_READ       0x0000100	/*  Break  */
-+#define DEBUG_I_LOOKUP     0x0001000	/*  Break  */
-+#define DEBUG_I_CREATE     0x0002000
-+#define DEBUG_I_GET        0x0004000
-+#define DEBUG_I_CHANGE     0x0008000
-+#define DEBUG_I_UNLINK     0x0010000
-+#define DEBUG_I_RLINK      0x0020000
-+#define DEBUG_I_FLINK      0x0040000
-+#define DEBUG_I_MKNOD      0x0080000
-+#define DEBUG_F_READDIR    0x0100000	/*  Break  */
-+#define DEBUG_D_DELETE     0x1000000	/*  Break  */
-+#define DEBUG_D_RELEASE    0x2000000
-+#define DEBUG_D_IPUT       0x4000000
-+#define DEBUG_ALL          0xfffffff
-+#define DEBUG_DISABLED     DEBUG_NONE
-+
-+#define OPTION_NONE             0x00
-+#define OPTION_MOUNT            0x01
-+
-+#define PRINTK(format, args...) \
-+   {printk (KERN_ERR "%s" format, __FUNCTION__ , ## args);}
-+
-+#define OOPS(format, args...) \
-+   {printk (KERN_CRIT "%s" format, __FUNCTION__ , ## args); \
-+    printk ("Forcing Oops\n"); \
-+    BUG();}
-+
-+#ifdef CONFIG_DEVFS_DEBUG
-+#  define VERIFY_ENTRY(de) \
-+   {if ((de) && (de)->magic_number != MAGIC_VALUE) \
-+        OOPS ("(%p): bad magic value: %x\n", (de), (de)->magic_number);}
-+#  define WRITE_ENTRY_MAGIC(de,magic) (de)->magic_number = (magic)
-+#  define DPRINTK(flag, format, args...) \
-+   {if (devfs_debug & flag) \
-+	printk (KERN_INFO "%s" format, __FUNCTION__ , ## args);}
-+#else
-+#  define VERIFY_ENTRY(de)
-+#  define WRITE_ENTRY_MAGIC(de,magic)
-+#  define DPRINTK(flag, format, args...)
-+#endif
-+
-+typedef struct devfs_entry *devfs_handle_t;
-+
-+struct directory_type {
-+	rwlock_t lock;		/*  Lock for searching(R)/updating(W)   */
-+	struct devfs_entry *first;
-+	struct devfs_entry *last;
-+	unsigned char no_more_additions:1;
-+};
-+
-+struct symlink_type {
-+	unsigned int length;	/*  Not including the NULL-termimator       */
-+	char *linkname;		/*  This is NULL-terminated                 */
-+};
-+
-+struct devfs_inode {		/*  This structure is for "persistent" inode storage  */
-+	struct dentry *dentry;
-+	struct timespec atime;
-+	struct timespec mtime;
-+	struct timespec ctime;
-+	unsigned int ino;	/*  Inode number as seen in the VFS         */
-+	uid_t uid;
-+	gid_t gid;
-+};
-+
-+struct devfs_entry {
-+#ifdef CONFIG_DEVFS_DEBUG
-+	unsigned int magic_number;
-+#endif
-+	void *info;
-+	atomic_t refcount;	/*  When this drops to zero, it's unused    */
-+	union {
-+		struct directory_type dir;
-+		dev_t dev;
-+		struct symlink_type symlink;
-+		const char *name;	/*  Only used for (mode == 0)               */
-+	} u;
-+	struct devfs_entry *prev;	/*  Previous entry in the parent directory  */
-+	struct devfs_entry *next;	/*  Next entry in the parent directory      */
-+	struct devfs_entry *parent;	/*  The parent directory                    */
-+	struct devfs_inode inode;
-+	umode_t mode;
-+	unsigned short namelen;	/*  I think 64k+ filenames are a way off... */
-+	unsigned char vfs:1;	/*  Whether the VFS may delete the entry   */
-+	char name[1];		/*  This is just a dummy: the allocated array
-+				   is bigger. This is NULL-terminated      */
-+};
-+
-+/*  The root of the device tree  */
-+static struct devfs_entry *root_entry;
-+
-+struct devfsd_buf_entry {
-+	struct devfs_entry *de;	/*  The name is generated with this         */
-+	unsigned short type;	/*  The type of event                       */
-+	umode_t mode;
-+	uid_t uid;
-+	gid_t gid;
-+	struct devfsd_buf_entry *next;
-+};
-+
-+struct fs_info {		/*  This structure is for the mounted devfs  */
-+	struct super_block *sb;
-+	spinlock_t devfsd_buffer_lock;	/*  Lock when inserting/deleting events  */
-+	struct devfsd_buf_entry *devfsd_first_event;
-+	struct devfsd_buf_entry *devfsd_last_event;
-+	volatile int devfsd_sleeping;
-+	volatile struct task_struct *devfsd_task;
-+	volatile pid_t devfsd_pgrp;
-+	volatile struct file *devfsd_file;
-+	struct devfsd_notify_struct *devfsd_info;
-+	volatile unsigned long devfsd_event_mask;
-+	atomic_t devfsd_overrun_count;
-+	wait_queue_head_t devfsd_wait_queue;	/*  Wake devfsd on input       */
-+	wait_queue_head_t revalidate_wait_queue;	/*  Wake when devfsd sleeps    */
-+};
-+
-+static struct fs_info fs_info = {.devfsd_buffer_lock = SPIN_LOCK_UNLOCKED };
-+static kmem_cache_t *devfsd_buf_cache;
-+#ifdef CONFIG_DEVFS_DEBUG
-+static unsigned int devfs_debug_init __initdata = DEBUG_NONE;
-+static unsigned int devfs_debug = DEBUG_NONE;
-+static DEFINE_SPINLOCK(stat_lock);
-+static unsigned int stat_num_entries;
-+static unsigned int stat_num_bytes;
-+#endif
-+static unsigned char poison_array[8] =
-+    { 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a, 0x5a };
-+
-+#ifdef CONFIG_DEVFS_MOUNT
-+static unsigned int boot_options = OPTION_MOUNT;
-+#else
-+static unsigned int boot_options = OPTION_NONE;
-+#endif
-+
-+/*  Forward function declarations  */
-+static devfs_handle_t _devfs_walk_path(struct devfs_entry *dir,
-+				       const char *name, int namelen,
-+				       int traverse_symlink);
-+static ssize_t devfsd_read(struct file *file, char __user *buf, size_t len,
-+			   loff_t * ppos);
-+static int devfsd_ioctl(struct inode *inode, struct file *file,
-+			unsigned int cmd, unsigned long arg);
-+static int devfsd_close(struct inode *inode, struct file *file);
-+#ifdef CONFIG_DEVFS_DEBUG
-+static ssize_t stat_read(struct file *file, char __user *buf, size_t len,
-+			 loff_t * ppos);
-+static const struct file_operations stat_fops = {
-+	.open = nonseekable_open,
-+	.read = stat_read,
-+};
-+#endif
-+
-+/*  Devfs daemon file operations  */
-+static const struct file_operations devfsd_fops = {
-+	.open = nonseekable_open,
-+	.read = devfsd_read,
-+	.ioctl = devfsd_ioctl,
-+	.release = devfsd_close,
-+};
-+
-+/*  Support functions follow  */
-+
-+/**
-+ *	devfs_get - Get a reference to a devfs entry.
-+ *	@de:  The devfs entry.
-+ */
-+
-+static struct devfs_entry *devfs_get(struct devfs_entry *de)
-+{
-+	VERIFY_ENTRY(de);
-+	if (de)
-+		atomic_inc(&de->refcount);
-+	return de;
-+}				/*  End Function devfs_get  */
-+
-+/**
-+ *	devfs_put - Put (release) a reference to a devfs entry.
-+ *	@de:  The handle to the devfs entry.
-+ */
-+
-+static void devfs_put(devfs_handle_t de)
-+{
-+	if (!de)
-+		return;
-+	VERIFY_ENTRY(de);
-+	if (de->info == POISON_PTR)
-+		OOPS("(%p): poisoned pointer\n", de);
-+	if (!atomic_dec_and_test(&de->refcount))
-+		return;
-+	if (de == root_entry)
-+		OOPS("(%p): root entry being freed\n", de);
-+	DPRINTK(DEBUG_FREE, "(%s): de: %p, parent: %p \"%s\"\n",
-+		de->name, de, de->parent,
-+		de->parent ? de->parent->name : "no parent");
-+	if (S_ISLNK(de->mode))
-+		kfree(de->u.symlink.linkname);
-+	WRITE_ENTRY_MAGIC(de, 0);
-+#ifdef CONFIG_DEVFS_DEBUG
-+	spin_lock(&stat_lock);
-+	--stat_num_entries;
-+	stat_num_bytes -= sizeof *de + de->namelen;
-+	if (S_ISLNK(de->mode))
-+		stat_num_bytes -= de->u.symlink.length + 1;
-+	spin_unlock(&stat_lock);
-+#endif
-+	de->info = POISON_PTR;
-+	kfree(de);
-+}				/*  End Function devfs_put  */
-+
-+/**
-+ *	_devfs_search_dir - Search for a devfs entry in a directory.
-+ *	@dir:  The directory to search.
-+ *	@name:  The name of the entry to search for.
-+ *	@namelen:  The number of characters in @name.
-+ *
-+ *  Search for a devfs entry in a directory and returns a pointer to the entry
-+ *   on success, else %NULL. The directory must be locked already.
-+ *   An implicit devfs_get() is performed on the returned entry.
-+ */
-+
-+static struct devfs_entry *_devfs_search_dir(struct devfs_entry *dir,
-+					     const char *name,
-+					     unsigned int namelen)
-+{
-+	struct devfs_entry *curr;
-+
-+	if (!S_ISDIR(dir->mode)) {
-+		PRINTK("(%s): not a directory\n", dir->name);
-+		return NULL;
-+	}
-+	for (curr = dir->u.dir.first; curr != NULL; curr = curr->next) {
-+		if (curr->namelen != namelen)
-+			continue;
-+		if (memcmp(curr->name, name, namelen) == 0)
-+			break;
-+		/*  Not found: try the next one  */
-+	}
-+	return devfs_get(curr);
-+}				/*  End Function _devfs_search_dir  */
-+
-+/**
-+ *	_devfs_alloc_entry - Allocate a devfs entry.
-+ *	@name:     the name of the entry
-+ *	@namelen:  the number of characters in @name
-+ *      @mode:     the mode for the entry
-+ *
-+ *  Allocate a devfs entry and returns a pointer to the entry on success, else
-+ *   %NULL.
-+ */
-+
-+static struct devfs_entry *_devfs_alloc_entry(const char *name,
-+					      unsigned int namelen,
-+					      umode_t mode)
-+{
-+	struct devfs_entry *new;
-+	static unsigned long inode_counter = FIRST_INODE;
-+	static DEFINE_SPINLOCK(counter_lock);
-+
-+	if (name && (namelen < 1))
-+		namelen = strlen(name);
-+	if ((new = kmalloc(sizeof *new + namelen, GFP_KERNEL)) == NULL)
-+		return NULL;
-+	memset(new, 0, sizeof *new + namelen);	/*  Will set '\0' on name  */
-+	new->mode = mode;
-+	if (S_ISDIR(mode))
-+		rwlock_init(&new->u.dir.lock);
-+	atomic_set(&new->refcount, 1);
-+	spin_lock(&counter_lock);
-+	new->inode.ino = inode_counter++;
-+	spin_unlock(&counter_lock);
-+	if (name)
-+		memcpy(new->name, name, namelen);
-+	new->namelen = namelen;
-+	WRITE_ENTRY_MAGIC(new, MAGIC_VALUE);
-+#ifdef CONFIG_DEVFS_DEBUG
-+	spin_lock(&stat_lock);
-+	++stat_num_entries;
-+	stat_num_bytes += sizeof *new + namelen;
-+	spin_unlock(&stat_lock);
-+#endif
-+	return new;
-+}				/*  End Function _devfs_alloc_entry  */
-+
-+/**
-+ *	_devfs_append_entry - Append a devfs entry to a directory's child list.
-+ *	@dir:  The directory to add to.
-+ *	@de:  The devfs entry to append.
-+ *	@old_de: If an existing entry exists, it will be written here. This may
-+ *		 be %NULL. An implicit devfs_get() is performed on this entry.
-+ *
-+ *  Append a devfs entry to a directory's list of children, checking first to
-+ *   see if an entry of the same name exists. The directory will be locked.
-+ *   The value 0 is returned on success, else a negative error code.
-+ *   On failure, an implicit devfs_put() is performed on %de.
-+ */
-+
-+static int _devfs_append_entry(devfs_handle_t dir, devfs_handle_t de,
-+			       devfs_handle_t * old_de)
-+{
-+	int retval;
-+
-+	if (old_de)
-+		*old_de = NULL;
-+	if (!S_ISDIR(dir->mode)) {
-+		PRINTK("(%s): dir: \"%s\" is not a directory\n", de->name,
-+		       dir->name);
-+		devfs_put(de);
-+		return -ENOTDIR;
-+	}
-+	write_lock(&dir->u.dir.lock);
-+	if (dir->u.dir.no_more_additions)
-+		retval = -ENOENT;
-+	else {
-+		struct devfs_entry *old;
-+
-+		old = _devfs_search_dir(dir, de->name, de->namelen);
-+		if (old_de)
-+			*old_de = old;
-+		else
-+			devfs_put(old);
-+		if (old == NULL) {
-+			de->parent = dir;
-+			de->prev = dir->u.dir.last;
-+			/*  Append to the directory's list of children  */
-+			if (dir->u.dir.first == NULL)
-+				dir->u.dir.first = de;
-+			else
-+				dir->u.dir.last->next = de;
-+			dir->u.dir.last = de;
-+			retval = 0;
-+		} else
-+			retval = -EEXIST;
-+	}
-+	write_unlock(&dir->u.dir.lock);
-+	if (retval)
-+		devfs_put(de);
-+	return retval;
-+}				/*  End Function _devfs_append_entry  */
-+
-+/**
-+ *	_devfs_get_root_entry - Get the root devfs entry.
-+ *
-+ *	Returns the root devfs entry on success, else %NULL.
-+ *
-+ *	TODO it must be called asynchronously due to the fact
-+ *	that devfs is initialized relatively late. Proper way
-+ *	is to remove module_init from init_devfs_fs and manually
-+ *	call it early enough during system init
-+ */
-+
-+static struct devfs_entry *_devfs_get_root_entry(void)
-+{
-+	struct devfs_entry *new;
-+	static DEFINE_SPINLOCK(root_lock);
-+
-+	if (root_entry)
-+		return root_entry;
-+
-+	new = _devfs_alloc_entry(NULL, 0, MODE_DIR);
-+	if (new == NULL)
-+		return NULL;
-+
-+	spin_lock(&root_lock);
-+	if (root_entry) {
-+		spin_unlock(&root_lock);
-+		devfs_put(new);
-+		return root_entry;
-+	}
-+	root_entry = new;
-+	spin_unlock(&root_lock);
-+
-+	return root_entry;
-+}				/*  End Function _devfs_get_root_entry  */
-+
-+/**
-+ *	_devfs_descend - Descend down a tree using the next component name.
-+ *	@dir:  The directory to search.
-+ *	@name:  The component name to search for.
-+ *	@namelen:  The length of %name.
-+ *	@next_pos:  The position of the next '/' or '\0' is written here.
-+ *
-+ *  Descend into a directory, searching for a component. This function forms
-+ *   the core of a tree-walking algorithm. The directory will be locked.
-+ *   The devfs entry corresponding to the component is returned. If there is
-+ *   no matching entry, %NULL is returned.
-+ *   An implicit devfs_get() is performed on the returned entry.
-+ */
-+
-+static struct devfs_entry *_devfs_descend(struct devfs_entry *dir,
-+					  const char *name, int namelen,
-+					  int *next_pos)
-+{
-+	const char *stop, *ptr;
-+	struct devfs_entry *entry;
-+
-+	if ((namelen >= 3) && (strncmp(name, "../", 3) == 0)) {	/*  Special-case going to parent directory  */
-+		*next_pos = 3;
-+		return devfs_get(dir->parent);
-+	}
-+	stop = name + namelen;
-+	/*  Search for a possible '/'  */
-+	for (ptr = name; (ptr < stop) && (*ptr != '/'); ++ptr) ;
-+	*next_pos = ptr - name;
-+	read_lock(&dir->u.dir.lock);
-+	entry = _devfs_search_dir(dir, name, *next_pos);
-+	read_unlock(&dir->u.dir.lock);
-+	return entry;
-+}				/*  End Function _devfs_descend  */
-+
-+static devfs_handle_t _devfs_make_parent_for_leaf(struct devfs_entry *dir,
-+						  const char *name,
-+						  int namelen, int *leaf_pos)
-+{
-+	int next_pos = 0;
-+
-+	if (dir == NULL)
-+		dir = _devfs_get_root_entry();
-+	if (dir == NULL)
-+		return NULL;
-+	devfs_get(dir);
-+	/*  Search for possible trailing component and ignore it  */
-+	for (--namelen; (namelen > 0) && (name[namelen] != '/'); --namelen) ;
-+	*leaf_pos = (name[namelen] == '/') ? (namelen + 1) : 0;
-+	for (; namelen > 0; name += next_pos, namelen -= next_pos) {
-+		struct devfs_entry *de, *old = NULL;
-+
-+		if ((de =
-+		     _devfs_descend(dir, name, namelen, &next_pos)) == NULL) {
-+			de = _devfs_alloc_entry(name, next_pos, MODE_DIR);
-+			devfs_get(de);
-+			if (!de || _devfs_append_entry(dir, de, &old)) {
-+				devfs_put(de);
-+				if (!old || !S_ISDIR(old->mode)) {
-+					devfs_put(old);
-+					devfs_put(dir);
-+					return NULL;
-+				}
-+				de = old;	/*  Use the existing directory  */
-+			}
-+		}
-+		if (de == dir->parent) {
-+			devfs_put(dir);
-+			devfs_put(de);
-+			return NULL;
-+		}
-+		devfs_put(dir);
-+		dir = de;
-+		if (name[next_pos] == '/')
-+			++next_pos;
-+	}
-+	return dir;
-+}				/*  End Function _devfs_make_parent_for_leaf  */
-+
-+static devfs_handle_t _devfs_prepare_leaf(devfs_handle_t * dir,
-+					  const char *name, umode_t mode)
-+{
-+	int namelen, leaf_pos;
-+	struct devfs_entry *de;
-+
-+	namelen = strlen(name);
-+	if ((*dir = _devfs_make_parent_for_leaf(*dir, name, namelen,
-+						&leaf_pos)) == NULL) {
-+		PRINTK("(%s): could not create parent path\n", name);
-+		return NULL;
-+	}
-+	if ((de = _devfs_alloc_entry(name + leaf_pos, namelen - leaf_pos, mode))
-+	    == NULL) {
-+		PRINTK("(%s): could not allocate entry\n", name);
-+		devfs_put(*dir);
-+		return NULL;
-+	}
-+	return de;
-+}				/*  End Function _devfs_prepare_leaf  */
-+
-+static devfs_handle_t _devfs_walk_path(struct devfs_entry *dir,
-+				       const char *name, int namelen,
-+				       int traverse_symlink)
-+{
-+	int next_pos = 0;
-+
-+	if (dir == NULL)
-+		dir = _devfs_get_root_entry();
-+	if (dir == NULL)
-+		return NULL;
-+	devfs_get(dir);
-+	for (; namelen > 0; name += next_pos, namelen -= next_pos) {
-+		struct devfs_entry *de, *link;
-+
-+		if (!S_ISDIR(dir->mode)) {
-+			devfs_put(dir);
-+			return NULL;
-+		}
-+
-+		if ((de =
-+		     _devfs_descend(dir, name, namelen, &next_pos)) == NULL) {
-+			devfs_put(dir);
-+			return NULL;
-+		}
-+		if (S_ISLNK(de->mode) && traverse_symlink) {	/*  Need to follow the link: this is a stack chomper  */
-+			/* FIXME what if it puts outside of mounted tree? */
-+			link = _devfs_walk_path(dir, de->u.symlink.linkname,
-+						de->u.symlink.length, TRUE);
-+			devfs_put(de);
-+			if (!link) {
-+				devfs_put(dir);
-+				return NULL;
-+			}
-+			de = link;
-+		}
-+		devfs_put(dir);
-+		dir = de;
-+		if (name[next_pos] == '/')
-+			++next_pos;
-+	}
-+	return dir;
-+}				/*  End Function _devfs_walk_path  */
-+
-+/**
-+ *	_devfs_find_entry - Find a devfs entry.
-+ *	@dir: The handle to the parent devfs directory entry. If this is %NULL the
-+ *		name is relative to the root of the devfs.
-+ *	@name: The name of the entry. This may be %NULL.
-+ *	@traverse_symlink: If %TRUE then symbolic links are traversed.
-+ *
-+ *	Returns the devfs_entry pointer on success, else %NULL. An implicit
-+ *	devfs_get() is performed.
-+ */
-+
-+static struct devfs_entry *_devfs_find_entry(devfs_handle_t dir,
-+					     const char *name,
-+					     int traverse_symlink)
-+{
-+	unsigned int namelen = strlen(name);
-+
-+	if (name[0] == '/') {
-+		/*  Skip leading pathname component  */
-+		if (namelen < 2) {
-+			PRINTK("(%s): too short\n", name);
-+			return NULL;
-+		}
-+		for (++name, --namelen; (*name != '/') && (namelen > 0);
-+		     ++name, --namelen) ;
-+		if (namelen < 2) {
-+			PRINTK("(%s): too short\n", name);
-+			return NULL;
-+		}
-+		++name;
-+		--namelen;
-+	}
-+	return _devfs_walk_path(dir, name, namelen, traverse_symlink);
-+}				/*  End Function _devfs_find_entry  */
-+
-+static struct devfs_entry *get_devfs_entry_from_vfs_inode(struct inode *inode)
-+{
-+	if (inode == NULL)
-+		return NULL;
-+	VERIFY_ENTRY((struct devfs_entry *)inode->i_private);
-+	return inode->i_private;
-+}				/*  End Function get_devfs_entry_from_vfs_inode  */
-+
-+/**
-+ *	free_dentry - Free the dentry for a device entry and invalidate inode.
-+ *	@de: The entry.
-+ *
-+ *	This must only be called after the entry has been unhooked from its
-+ *	 parent directory.
-+ */
-+
-+static void free_dentry(struct devfs_entry *de)
-+{
-+	struct dentry *dentry = de->inode.dentry;
-+
-+	if (!dentry)
-+		return;
-+	spin_lock(&dcache_lock);
-+	dget_locked(dentry);
-+	spin_unlock(&dcache_lock);
-+	/*  Forcefully remove the inode  */
-+	if (dentry->d_inode != NULL)
-+		dentry->d_inode->i_nlink = 0;
-+	d_drop(dentry);
-+	dput(dentry);
-+}				/*  End Function free_dentry  */
-+
-+/**
-+ *	is_devfsd_or_child - Test if the current process is devfsd or one of its children.
-+ *	@fs_info: The filesystem information.
-+ *
-+ *	Returns %TRUE if devfsd or child, else %FALSE.
-+ */
-+
-+static int is_devfsd_or_child(struct fs_info *fs_info)
-+{
-+	struct task_struct *p = current;
-+
-+	if (p == fs_info->devfsd_task)
-+		return (TRUE);
-+	if (process_group(p) == fs_info->devfsd_pgrp)
-+		return (TRUE);
-+	read_lock(&tasklist_lock);
-+	for (; p != &init_task; p = p->real_parent) {
-+		if (p == fs_info->devfsd_task) {
-+			read_unlock(&tasklist_lock);
-+			return (TRUE);
-+		}
-+	}
-+	read_unlock(&tasklist_lock);
-+	return (FALSE);
-+}				/*  End Function is_devfsd_or_child  */
-+
-+/**
-+ *	devfsd_queue_empty - Test if devfsd has work pending in its event queue.
-+ *	@fs_info: The filesystem information.
-+ *
-+ *	Returns %TRUE if the queue is empty, else %FALSE.
-+ */
-+
-+static inline int devfsd_queue_empty(struct fs_info *fs_info)
-+{
-+	return (fs_info->devfsd_last_event) ? FALSE : TRUE;
-+}				/*  End Function devfsd_queue_empty  */
-+
-+/**
-+ *	wait_for_devfsd_finished - Wait for devfsd to finish processing its event queue.
-+ *	@fs_info: The filesystem information.
-+ *
-+ *	Returns %TRUE if no more waiting will be required, else %FALSE.
-+ */
-+
-+static int wait_for_devfsd_finished(struct fs_info *fs_info)
-+{
-+	DECLARE_WAITQUEUE(wait, current);
-+
-+	if (fs_info->devfsd_task == NULL)
-+		return (TRUE);
-+	if (devfsd_queue_empty(fs_info) && fs_info->devfsd_sleeping)
-+		return TRUE;
-+	if (is_devfsd_or_child(fs_info))
-+		return (FALSE);
-+	set_current_state(TASK_UNINTERRUPTIBLE);
-+	add_wait_queue(&fs_info->revalidate_wait_queue, &wait);
-+	if (!devfsd_queue_empty(fs_info) || !fs_info->devfsd_sleeping)
-+		if (fs_info->devfsd_task)
-+			schedule();
-+	remove_wait_queue(&fs_info->revalidate_wait_queue, &wait);
-+	__set_current_state(TASK_RUNNING);
-+	return (TRUE);
-+}				/*  End Function wait_for_devfsd_finished  */
-+
-+/**
-+ *	devfsd_notify_de - Notify the devfsd daemon of a change.
-+ *	@de: The devfs entry that has changed. This and all parent entries will
-+ *            have their reference counts incremented if the event was queued.
-+ *	@type: The type of change.
-+ *	@mode: The mode of the entry.
-+ *	@uid: The user ID.
-+ *	@gid: The group ID.
-+ *	@fs_info: The filesystem info.
-+ *
-+ *	Returns %TRUE if an event was queued and devfsd woken up, else %FALSE.
-+ */
-+
-+static int devfsd_notify_de(struct devfs_entry *de,
-+			    unsigned short type, umode_t mode,
-+			    uid_t uid, gid_t gid, struct fs_info *fs_info)
-+{
-+	struct devfsd_buf_entry *entry;
-+	struct devfs_entry *curr;
-+
-+	if (!(fs_info->devfsd_event_mask & (1 << type)))
-+		return (FALSE);
-+	if ((entry = kmem_cache_alloc(devfsd_buf_cache, SLAB_KERNEL)) == NULL) {
-+		atomic_inc(&fs_info->devfsd_overrun_count);
-+		return (FALSE);
-+	}
-+	for (curr = de; curr != NULL; curr = curr->parent)
-+		devfs_get(curr);
-+	entry->de = de;
-+	entry->type = type;
-+	entry->mode = mode;
-+	entry->uid = uid;
-+	entry->gid = gid;
-+	entry->next = NULL;
-+	spin_lock(&fs_info->devfsd_buffer_lock);
-+	if (!fs_info->devfsd_first_event)
-+		fs_info->devfsd_first_event = entry;
-+	if (fs_info->devfsd_last_event)
-+		fs_info->devfsd_last_event->next = entry;
-+	fs_info->devfsd_last_event = entry;
-+	spin_unlock(&fs_info->devfsd_buffer_lock);
-+	wake_up_interruptible(&fs_info->devfsd_wait_queue);
-+	return (TRUE);
-+}				/*  End Function devfsd_notify_de  */
-+
-+/**
-+ *	devfsd_notify - Notify the devfsd daemon of a change.
-+ *	@de: The devfs entry that has changed.
-+ *	@type: The type of change event.
-+ *	@wait: If TRUE, the function waits for the daemon to finish processing
-+ *		the event.
-+ */
-+
-+static void devfsd_notify(struct devfs_entry *de, unsigned short type)
-+{
-+	devfsd_notify_de(de, type, de->mode, current->euid,
-+			 current->egid, &fs_info);
-+}
-+
-+static int devfs_mk_dev(dev_t dev, umode_t mode, const char *fmt, va_list args)
-+{
-+	struct devfs_entry *dir = NULL, *de;
-+	char buf[64];
-+	int error, n;
-+
-+	n = vsnprintf(buf, sizeof(buf), fmt, args);
-+	if (n >= sizeof(buf) || !buf[0]) {
-+		printk(KERN_WARNING "%s: invalid format string %s\n",
-+		       __FUNCTION__, fmt);
-+		return -EINVAL;
-+	}
-+
-+	de = _devfs_prepare_leaf(&dir, buf, mode);
-+	if (!de) {
-+		printk(KERN_WARNING "%s: could not prepare leaf for %s\n",
-+		       __FUNCTION__, buf);
-+		return -ENOMEM;	/* could be more accurate... */
-+	}
-+
-+	de->u.dev = dev;
-+
-+	error = _devfs_append_entry(dir, de, NULL);
-+	if (error) {
-+		printk(KERN_WARNING "%s: could not append to parent for %s\n",
-+		       __FUNCTION__, buf);
-+		goto out;
-+	}
-+
-+	devfsd_notify(de, DEVFSD_NOTIFY_REGISTERED);
-+      out:
-+	devfs_put(dir);
-+	return error;
-+}
-+
-+int devfs_mk_bdev(dev_t dev, umode_t mode, const char *fmt, ...)
-+{
-+	va_list args;
-+
-+	if (!S_ISBLK(mode)) {
-+		printk(KERN_WARNING "%s: invalide mode (%u) for %s\n",
-+		       __FUNCTION__, mode, fmt);
-+		return -EINVAL;
-+	}
-+
-+	va_start(args, fmt);
-+	return devfs_mk_dev(dev, mode, fmt, args);
-+}
-+
-+EXPORT_SYMBOL(devfs_mk_bdev);
-+
-+int devfs_mk_cdev(dev_t dev, umode_t mode, const char *fmt, ...)
-+{
-+	va_list args;
-+
-+	if (!S_ISCHR(mode)) {
-+		printk(KERN_WARNING "%s: invalide mode (%u) for %s\n",
-+		       __FUNCTION__, mode, fmt);
-+		return -EINVAL;
-+	}
-+
-+	va_start(args, fmt);
-+	return devfs_mk_dev(dev, mode, fmt, args);
-+}
-+
-+EXPORT_SYMBOL(devfs_mk_cdev);
-+
-+/**
-+ *	_devfs_unhook - Unhook a device entry from its parents list
-+ *	@de: The entry to unhook.
-+ *
-+ *	Returns %TRUE if the entry was unhooked, else %FALSE if it was
-+ *		previously unhooked.
-+ *	The caller must have a write lock on the parent directory.
-+ */
-+
-+static int _devfs_unhook(struct devfs_entry *de)
-+{
-+	struct devfs_entry *parent;
-+
-+	if (!de || (de->prev == de))
-+		return FALSE;
-+	parent = de->parent;
-+	if (de->prev == NULL)
-+		parent->u.dir.first = de->next;
-+	else
-+		de->prev->next = de->next;
-+	if (de->next == NULL)
-+		parent->u.dir.last = de->prev;
-+	else
-+		de->next->prev = de->prev;
-+	de->prev = de;		/*  Indicate we're unhooked                      */
-+	de->next = NULL;	/*  Force early termination for <devfs_readdir>  */
-+	return TRUE;
-+}				/*  End Function _devfs_unhook  */
-+
-+/**
-+ *	_devfs_unregister - Unregister a device entry from its parent.
-+ *	@dir: The parent directory.
-+ *	@de: The entry to unregister.
-+ *
-+ *	The caller must have a write lock on the parent directory, which is
-+ *	unlocked by this function.
-+ */
-+
-+static void _devfs_unregister(struct devfs_entry *dir, struct devfs_entry *de)
-+{
-+	int unhooked = _devfs_unhook(de);
-+
-+	write_unlock(&dir->u.dir.lock);
-+	if (!unhooked)
-+		return;
-+	devfs_get(dir);
-+	devfsd_notify(de, DEVFSD_NOTIFY_UNREGISTERED);
-+	free_dentry(de);
-+	devfs_put(dir);
-+	if (!S_ISDIR(de->mode))
-+		return;
-+	while (TRUE) {		/*  Recursively unregister: this is a stack chomper  */
-+		struct devfs_entry *child;
-+
-+		write_lock(&de->u.dir.lock);
-+		de->u.dir.no_more_additions = TRUE;
-+		child = de->u.dir.first;
-+		VERIFY_ENTRY(child);
-+		_devfs_unregister(de, child);
-+		if (!child)
-+			break;
-+		DPRINTK(DEBUG_UNREGISTER, "(%s): child: %p  refcount: %d\n",
-+			child->name, child, atomic_read(&child->refcount));
-+		devfs_put(child);
-+	}
-+}				/*  End Function _devfs_unregister  */
-+
-+static int devfs_do_symlink(devfs_handle_t dir, const char *name,
-+			    const char *link, devfs_handle_t * handle)
-+{
-+	int err;
-+	unsigned int linklength;
-+	char *newlink;
-+	struct devfs_entry *de;
-+
-+	if (handle != NULL)
-+		*handle = NULL;
-+	if (name == NULL) {
-+		PRINTK("(): NULL name pointer\n");
-+		return -EINVAL;
-+	}
-+	if (link == NULL) {
-+		PRINTK("(%s): NULL link pointer\n", name);
-+		return -EINVAL;
-+	}
-+	linklength = strlen(link);
-+	if ((newlink = kmalloc(linklength + 1, GFP_KERNEL)) == NULL)
-+		return -ENOMEM;
-+	memcpy(newlink, link, linklength);
-+	newlink[linklength] = '\0';
-+	if ((de = _devfs_prepare_leaf(&dir, name, S_IFLNK | S_IRUGO | S_IXUGO))
-+	    == NULL) {
-+		PRINTK("(%s): could not prepare leaf\n", name);
-+		kfree(newlink);
-+		return -ENOTDIR;
-+	}
-+	de->info = NULL;
-+	de->u.symlink.linkname = newlink;
-+	de->u.symlink.length = linklength;
-+	if ((err = _devfs_append_entry(dir, de, NULL)) != 0) {
-+		PRINTK("(%s): could not append to parent, err: %d\n", name,
-+		       err);
-+		devfs_put(dir);
-+		return err;
-+	}
-+	devfs_put(dir);
-+#ifdef CONFIG_DEVFS_DEBUG
-+	spin_lock(&stat_lock);
-+	stat_num_bytes += linklength + 1;
-+	spin_unlock(&stat_lock);
-+#endif
-+	if (handle != NULL)
-+		*handle = de;
-+	return 0;
-+}				/*  End Function devfs_do_symlink  */
-+
-+/**
-+ *	devfs_mk_symlink Create a symbolic link in the devfs namespace.
-+ *	@from: The name of the entry.
-+ *	@to: Name of the destination
-+ *
-+ *	Returns 0 on success, else a negative error code is returned.
-+ */
-+
-+int devfs_mk_symlink(const char *from, const char *to)
-+{
-+	devfs_handle_t de;
-+	int err;
-+
-+	err = devfs_do_symlink(NULL, from, to, &de);
-+	if (!err) {
-+		de->vfs = TRUE;
-+		devfsd_notify(de, DEVFSD_NOTIFY_REGISTERED);
-+	}
-+
-+	return err;
-+}
-+
-+/**
-+ *	devfs_mk_dir - Create a directory in the devfs namespace.
-+ *		new name is relative to the root of the devfs.
-+ *	@fmt: The name of the entry.
-+ *
-+ *	Use of this function is optional. The devfs_register() function
-+ *	will automatically create intermediate directories as needed. This function
-+ *	is provided for efficiency reasons, as it provides a handle to a directory.
-+ *	On failure %NULL is returned.
-+ */
-+
-+int devfs_mk_dir(const char *fmt, ...)
-+{
-+	struct devfs_entry *dir = NULL, *de = NULL, *old;
-+	char buf[64];
-+	va_list args;
-+	int error, n;
-+
-+	va_start(args, fmt);
-+	n = vsnprintf(buf, 64, fmt, args);
-+	if (n >= 64 || !buf[0]) {
-+		printk(KERN_WARNING "%s: invalid argument.", __FUNCTION__);
-+		return -EINVAL;
-+	}
-+
-+	de = _devfs_prepare_leaf(&dir, buf, MODE_DIR);
-+	if (!de) {
-+		PRINTK("(%s): could not prepare leaf\n", buf);
-+		return -EINVAL;
-+	}
-+
-+	error = _devfs_append_entry(dir, de, &old);
-+	if (error == -EEXIST && S_ISDIR(old->mode)) {
-+		/*
-+		 * devfs_mk_dir() of an already-existing directory will
-+		 * return success.
-+		 */
-+		error = 0;
-+		goto out_put;
-+	} else if (error) {
-+		PRINTK("(%s): could not append to dir: %p \"%s\"\n",
-+		       buf, dir, dir->name);
-+		devfs_put(old);
-+		goto out_put;
-+	}
-+
-+	devfsd_notify(de, DEVFSD_NOTIFY_REGISTERED);
-+
-+      out_put:
-+	devfs_put(dir);
-+	return error;
-+}
-+
-+void devfs_remove(const char *fmt, ...)
-+{
-+	char buf[64];
-+	va_list args;
-+	int n;
-+
-+	va_start(args, fmt);
-+	n = vsnprintf(buf, sizeof(buf), fmt, args);
-+	if (n < sizeof(buf) && buf[0]) {
-+		devfs_handle_t de = _devfs_find_entry(NULL, buf, 0);
-+
-+		if (!de) {
-+			printk(KERN_ERR "%s: %s not found, cannot remove\n",
-+			       __FUNCTION__, buf);
-+			dump_stack();
-+			return;
-+		}
-+
-+		write_lock(&de->parent->u.dir.lock);
-+		_devfs_unregister(de->parent, de);
-+		devfs_put(de);
-+		devfs_put(de);
-+	}
-+}
-+
-+/**
-+ *	devfs_generate_path - Generate a pathname for an entry, relative to the devfs root.
-+ *	@de: The devfs entry.
-+ *	@path: The buffer to write the pathname to. The pathname and '\0'
-+ *		terminator will be written at the end of the buffer.
-+ *	@buflen: The length of the buffer.
-+ *
-+ *	Returns the offset in the buffer where the pathname starts on success,
-+ *	else a negative error code.
-+ */
-+
-+static int devfs_generate_path(devfs_handle_t de, char *path, int buflen)
-+{
-+	int pos;
-+#define NAMEOF(de) ( (de)->mode ? (de)->name : (de)->u.name )
-+
-+	if (de == NULL)
-+		return -EINVAL;
-+	VERIFY_ENTRY(de);
-+	if (de->namelen >= buflen)
-+		return -ENAMETOOLONG;	/*  Must be first       */
-+	path[buflen - 1] = '\0';
-+	if (de->parent == NULL)
-+		return buflen - 1;	/*  Don't prepend root  */
-+	pos = buflen - de->namelen - 1;
-+	memcpy(path + pos, NAMEOF(de), de->namelen);
-+	for (de = de->parent; de->parent != NULL; de = de->parent) {
-+		if (pos - de->namelen - 1 < 0)
-+			return -ENAMETOOLONG;
-+		path[--pos] = '/';
-+		pos -= de->namelen;
-+		memcpy(path + pos, NAMEOF(de), de->namelen);
-+	}
-+	return pos;
-+}				/*  End Function devfs_generate_path  */
-+
-+/**
-+ *	devfs_setup - Process kernel boot options.
-+ *	@str: The boot options after the "devfs=".
-+ */
-+
-+static int __init devfs_setup(char *str)
-+{
-+	static struct {
-+		char *name;
-+		unsigned int mask;
-+		unsigned int *opt;
-+	} devfs_options_tab[] __initdata = {
-+#ifdef CONFIG_DEVFS_DEBUG
-+		{
-+		"dall", DEBUG_ALL, &devfs_debug_init}, {
-+		"dmod", DEBUG_MODULE_LOAD, &devfs_debug_init}, {
-+		"dreg", DEBUG_REGISTER, &devfs_debug_init}, {
-+		"dunreg", DEBUG_UNREGISTER, &devfs_debug_init}, {
-+		"dfree", DEBUG_FREE, &devfs_debug_init}, {
-+		"diget", DEBUG_I_GET, &devfs_debug_init}, {
-+		"dchange", DEBUG_SET_FLAGS, &devfs_debug_init}, {
-+		"dsread", DEBUG_S_READ, &devfs_debug_init}, {
-+		"dichange", DEBUG_I_CHANGE, &devfs_debug_init}, {
-+		"dimknod", DEBUG_I_MKNOD, &devfs_debug_init}, {
-+		"dilookup", DEBUG_I_LOOKUP, &devfs_debug_init}, {
-+		"diunlink", DEBUG_I_UNLINK, &devfs_debug_init},
-+#endif				/*  CONFIG_DEVFS_DEBUG  */
-+		{
-+		"mount", OPTION_MOUNT, &boot_options}, {
-+		NULL, 0, NULL}
-+	};
-+
-+	while ((*str != '\0') && !isspace(*str)) {
-+		int i, found = 0, invert = 0;
-+
-+		if (strncmp(str, "no", 2) == 0) {
-+			invert = 1;
-+			str += 2;
-+		}
-+		for (i = 0; devfs_options_tab[i].name != NULL; i++) {
-+			int len = strlen(devfs_options_tab[i].name);
-+
-+			if (strncmp(str, devfs_options_tab[i].name, len) == 0) {
-+				if (invert)
-+					*devfs_options_tab[i].opt &=
-+					    ~devfs_options_tab[i].mask;
-+				else
-+					*devfs_options_tab[i].opt |=
-+					    devfs_options_tab[i].mask;
-+				str += len;
-+				found = 1;
-+				break;
-+			}
-+		}
-+		if (!found)
-+			return 0;	/*  No match         */
-+		if (*str != ',')
-+			return 0;	/*  No more options  */
-+		++str;
-+	}
-+	return 1;
-+}				/*  End Function devfs_setup  */
-+
-+__setup("devfs=", devfs_setup);
-+
-+EXPORT_SYMBOL(devfs_mk_dir);
-+EXPORT_SYMBOL(devfs_remove);
-+
-+/**
-+ *	try_modload - Notify devfsd of an inode lookup by a non-devfsd process.
-+ *	@parent: The parent devfs entry.
-+ *	@fs_info: The filesystem info.
-+ *	@name: The device name.
-+ *	@namelen: The number of characters in @name.
-+ *	@buf: A working area that will be used. This must not go out of scope
-+ *            until devfsd is idle again.
-+ *
-+ *	Returns 0 on success (event was queued), else a negative error code.
-+ */
-+
-+static int try_modload(struct devfs_entry *parent, struct fs_info *fs_info,
-+		       const char *name, unsigned namelen,
-+		       struct devfs_entry *buf)
-+{
-+	if (!(fs_info->devfsd_event_mask & (1 << DEVFSD_NOTIFY_LOOKUP)))
-+		return -ENOENT;
-+	if (is_devfsd_or_child(fs_info))
-+		return -ENOENT;
-+	memset(buf, 0, sizeof *buf);
-+	atomic_set(&buf->refcount, 1);
-+	buf->parent = parent;
-+	buf->namelen = namelen;
-+	buf->u.name = name;
-+	WRITE_ENTRY_MAGIC(buf, MAGIC_VALUE);
-+	if (!devfsd_notify_de(buf, DEVFSD_NOTIFY_LOOKUP, 0,
-+			      current->euid, current->egid, fs_info))
-+		return -ENOENT;
-+	/*  Possible success: event has been queued  */
-+	return 0;
-+}				/*  End Function try_modload  */
-+
-+/*  Superblock operations follow  */
-+
-+static struct inode_operations devfs_iops;
-+static struct inode_operations devfs_dir_iops;
-+static const struct file_operations devfs_fops;
-+static const struct file_operations devfs_dir_fops;
-+static struct inode_operations devfs_symlink_iops;
-+
-+static int devfs_notify_change(struct dentry *dentry, struct iattr *iattr)
-+{
-+	int retval;
-+	struct devfs_entry *de;
-+	struct inode *inode = dentry->d_inode;
-+	struct fs_info *fs_info = inode->i_sb->s_fs_info;
-+
-+	de = get_devfs_entry_from_vfs_inode(inode);
-+	if (de == NULL)
-+		return -ENODEV;
-+	retval = inode_change_ok(inode, iattr);
-+	if (retval != 0)
-+		return retval;
-+	retval = inode_setattr(inode, iattr);
-+	if (retval != 0)
-+		return retval;
-+	DPRINTK(DEBUG_I_CHANGE, "(%d): VFS inode: %p  devfs_entry: %p\n",
-+		(int)inode->i_ino, inode, de);
-+	DPRINTK(DEBUG_I_CHANGE, "():   mode: 0%o  uid: %d  gid: %d\n",
-+		(int)inode->i_mode, (int)inode->i_uid, (int)inode->i_gid);
-+	/*  Inode is not on hash chains, thus must save permissions here rather
-+	   than in a write_inode() method  */
-+	de->mode = inode->i_mode;
-+	de->inode.uid = inode->i_uid;
-+	de->inode.gid = inode->i_gid;
-+	de->inode.atime = inode->i_atime;
-+	de->inode.mtime = inode->i_mtime;
-+	de->inode.ctime = inode->i_ctime;
-+	if ((iattr->ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID)) &&
-+	    !is_devfsd_or_child(fs_info))
-+		devfsd_notify_de(de, DEVFSD_NOTIFY_CHANGE, inode->i_mode,
-+				 inode->i_uid, inode->i_gid, fs_info);
-+	return 0;
-+}				/*  End Function devfs_notify_change  */
-+
-+static struct super_operations devfs_sops = {
-+	.drop_inode = generic_delete_inode,
-+	.statfs = simple_statfs,
-+};
-+
-+/**
-+ *	_devfs_get_vfs_inode - Get a VFS inode.
-+ *	@sb: The super block.
-+ *	@de: The devfs inode.
-+ *	@dentry: The dentry to register with the devfs inode.
-+ *
-+ *	Returns the inode on success, else %NULL. An implicit devfs_get() is
-+ *       performed if the inode is created.
-+ */
-+
-+static struct inode *_devfs_get_vfs_inode(struct super_block *sb,
-+					  struct devfs_entry *de,
-+					  struct dentry *dentry)
-+{
-+	struct inode *inode;
-+
-+	if (de->prev == de)
-+		return NULL;	/*  Quick check to see if unhooked  */
-+	if ((inode = new_inode(sb)) == NULL) {
-+		PRINTK("(%s): new_inode() failed, de: %p\n", de->name, de);
-+		return NULL;
-+	}
-+	if (de->parent) {
-+		read_lock(&de->parent->u.dir.lock);
-+		if (de->prev != de)
-+			de->inode.dentry = dentry;	/*      Not unhooked  */
-+		read_unlock(&de->parent->u.dir.lock);
-+	} else
-+		de->inode.dentry = dentry;	/*  Root: no locking needed  */
-+	if (de->inode.dentry != dentry) {	/*  Must have been unhooked  */
-+		iput(inode);
-+		return NULL;
-+	}
-+	/* FIXME where is devfs_put? */
-+	inode->i_private = devfs_get(de);
-+	inode->i_ino = de->inode.ino;
-+	DPRINTK(DEBUG_I_GET, "(%d): VFS inode: %p  devfs_entry: %p\n",
-+		(int)inode->i_ino, inode, de);
-+	inode->i_blocks = 0;
-+	inode->i_op = &devfs_iops;
-+	inode->i_mode = de->mode;
-+	if (S_ISDIR(de->mode)) {
-+		inode->i_op = &devfs_dir_iops;
-+		inode->i_fop = &devfs_dir_fops;
-+	} else if (S_ISLNK(de->mode)) {
-+		inode->i_op = &devfs_symlink_iops;
-+		inode->i_size = de->u.symlink.length;
-+	} else if (S_ISCHR(de->mode) || S_ISBLK(de->mode)) {
-+		init_special_inode(inode, de->mode, de->u.dev);
-+	} else if (S_ISFIFO(de->mode) || S_ISSOCK(de->mode)) {
-+		init_special_inode(inode, de->mode, 0);
-+	} else {
-+		PRINTK("(%s): unknown mode %o de: %p\n",
-+		       de->name, de->mode, de);
-+		iput(inode);
-+		devfs_put(de);
-+		return NULL;
-+	}
-+
-+	inode->i_uid = de->inode.uid;
-+	inode->i_gid = de->inode.gid;
-+	inode->i_atime = de->inode.atime;
-+	inode->i_mtime = de->inode.mtime;
-+	inode->i_ctime = de->inode.ctime;
-+	DPRINTK(DEBUG_I_GET, "():   mode: 0%o  uid: %d  gid: %d\n",
-+		(int)inode->i_mode, (int)inode->i_uid, (int)inode->i_gid);
-+	return inode;
-+}				/*  End Function _devfs_get_vfs_inode  */
-+
-+/*  File operations for device entries follow  */
-+
-+static int devfs_readdir(struct file *file, void *dirent, filldir_t filldir)
-+{
-+	int err, count;
-+	int stored = 0;
-+	struct fs_info *fs_info;
-+	struct devfs_entry *parent, *de, *next = NULL;
-+	struct inode *inode = file->f_dentry->d_inode;
-+
-+	fs_info = inode->i_sb->s_fs_info;
-+	parent = get_devfs_entry_from_vfs_inode(file->f_dentry->d_inode);
-+	if ((long)file->f_pos < 0)
-+		return -EINVAL;
-+	DPRINTK(DEBUG_F_READDIR, "(%s): fs_info: %p  pos: %ld\n",
-+		parent->name, fs_info, (long)file->f_pos);
-+	switch ((long)file->f_pos) {
-+	case 0:
-+		err = (*filldir) (dirent, "..", 2, file->f_pos,
-+				  parent_ino(file->f_dentry), DT_DIR);
-+		if (err == -EINVAL)
-+			break;
-+		if (err < 0)
-+			return err;
-+		file->f_pos++;
-+		++stored;
-+		/*  Fall through  */
-+	case 1:
-+		err =
-+		    (*filldir) (dirent, ".", 1, file->f_pos, inode->i_ino,
-+				DT_DIR);
-+		if (err == -EINVAL)
-+			break;
-+		if (err < 0)
-+			return err;
-+		file->f_pos++;
-+		++stored;
-+		/*  Fall through  */
-+	default:
-+		/*  Skip entries  */
-+		count = file->f_pos - 2;
-+		read_lock(&parent->u.dir.lock);
-+		for (de = parent->u.dir.first; de && (count > 0); de = de->next)
-+			--count;
-+		devfs_get(de);
-+		read_unlock(&parent->u.dir.lock);
-+		/*  Now add all remaining entries  */
-+		while (de) {
-+			err = (*filldir) (dirent, de->name, de->namelen,
-+					  file->f_pos, de->inode.ino,
-+					  de->mode >> 12);
-+			if (err < 0)
-+				devfs_put(de);
-+			else {
-+				file->f_pos++;
-+				++stored;
-+			}
-+			if (err == -EINVAL)
-+				break;
-+			if (err < 0)
-+				return err;
-+			read_lock(&parent->u.dir.lock);
-+			next = devfs_get(de->next);
-+			read_unlock(&parent->u.dir.lock);
-+			devfs_put(de);
-+			de = next;
-+		}
-+		break;
-+	}
-+	return stored;
-+}				/*  End Function devfs_readdir  */
-+
-+/* Open devfs specific special files */
-+static int devfs_open(struct inode *inode, struct file *file)
-+{
-+	int err;
-+	int minor = MINOR(inode->i_rdev);
-+	struct file_operations *old_fops, *new_fops;
-+
-+	switch (minor) {
-+	case 0:		/* /dev/.devfsd */
-+		new_fops = fops_get(&devfsd_fops);
-+		break;
-+#ifdef CONFIG_DEVFS_DEBUG
-+	case 1:		/* /dev/.stat */
-+		new_fops = fops_get(&stat_fops);
-+		break;
-+#endif
-+	default:
-+		return -ENODEV;
-+	}
-+
-+	if (new_fops == NULL)
-+		return -ENODEV;
-+	old_fops = file->f_op;
-+	file->f_op = new_fops;
-+	err = new_fops->open ? new_fops->open(inode, file) : 0;
-+	if (err) {
-+		file->f_op = old_fops;
-+		fops_put(new_fops);
-+	} else
-+		fops_put(old_fops);
-+	return err;
-+}				/*  End Function devfs_open  */
-+
-+static const struct file_operations devfs_fops = {
-+	.open = devfs_open,
-+};
-+
-+static const struct file_operations devfs_dir_fops = {
-+	.read = generic_read_dir,
-+	.readdir = devfs_readdir,
-+};
-+
-+/*  Dentry operations for device entries follow  */
-+
-+/**
-+ *	devfs_d_release - Callback for when a dentry is freed.
-+ *	@dentry: The dentry.
-+ */
-+
-+static void devfs_d_release(struct dentry *dentry)
-+{
-+	DPRINTK(DEBUG_D_RELEASE, "(%p): inode: %p\n", dentry, dentry->d_inode);
-+}				/*  End Function devfs_d_release  */
-+
-+/**
-+ *	devfs_d_iput - Callback for when a dentry loses its inode.
-+ *	@dentry: The dentry.
-+ *	@inode:	The inode.
-+ */
-+
-+static void devfs_d_iput(struct dentry *dentry, struct inode *inode)
-+{
-+	struct devfs_entry *de;
-+
-+	de = get_devfs_entry_from_vfs_inode(inode);
-+	DPRINTK(DEBUG_D_IPUT,
-+		"(%s): dentry: %p inode: %p de: %p de->dentry: %p\n", de->name,
-+		dentry, inode, de, de->inode.dentry);
-+	if (de->inode.dentry && (de->inode.dentry != dentry))
-+		OOPS("(%s): de: %p dentry: %p de->dentry: %p\n",
-+		     de->name, de, dentry, de->inode.dentry);
-+	de->inode.dentry = NULL;
-+	iput(inode);
-+	devfs_put(de);
-+}				/*  End Function devfs_d_iput  */
-+
-+static int devfs_d_delete(struct dentry *dentry);
-+
-+static struct dentry_operations devfs_dops = {
-+	.d_delete = devfs_d_delete,
-+	.d_release = devfs_d_release,
-+	.d_iput = devfs_d_iput,
-+};
-+
-+static int devfs_d_revalidate_wait(struct dentry *dentry, struct nameidata *);
-+
-+static struct dentry_operations devfs_wait_dops = {
-+	.d_delete = devfs_d_delete,
-+	.d_release = devfs_d_release,
-+	.d_iput = devfs_d_iput,
-+	.d_revalidate = devfs_d_revalidate_wait,
-+};
-+
-+/**
-+ *	devfs_d_delete - Callback for when all files for a dentry are closed.
-+ *	@dentry: The dentry.
-+ */
-+
-+static int devfs_d_delete(struct dentry *dentry)
-+{
-+	struct inode *inode = dentry->d_inode;
-+
-+	if (dentry->d_op == &devfs_wait_dops)
-+		dentry->d_op = &devfs_dops;
-+	/*  Unhash dentry if negative (has no inode)  */
-+	if (inode == NULL) {
-+		DPRINTK(DEBUG_D_DELETE, "(%p): dropping negative dentry\n",
-+			dentry);
-+		return 1;
-+	}
-+	return 0;
-+}				/*  End Function devfs_d_delete  */
-+
-+struct devfs_lookup_struct {
-+	devfs_handle_t de;
-+	wait_queue_head_t wait_queue;
-+};
-+
-+/* XXX: this doesn't handle the case where we got a negative dentry
-+        but a devfs entry has been registered in the meanwhile */
-+static int devfs_d_revalidate_wait(struct dentry *dentry, struct nameidata *nd)
-+{
-+	struct inode *dir = dentry->d_parent->d_inode;
-+	struct fs_info *fs_info = dir->i_sb->s_fs_info;
-+	devfs_handle_t parent = get_devfs_entry_from_vfs_inode(dir);
-+	struct devfs_lookup_struct *lookup_info = dentry->d_fsdata;
-+	DECLARE_WAITQUEUE(wait, current);
-+	int need_lock;
-+
-+	/*
-+	 * FIXME HACK
-+	 *
-+	 * make sure that
-+	 *   d_instantiate always runs under lock
-+	 *   we release i_mutex lock before going to sleep
-+	 *
-+	 * unfortunately sometimes d_revalidate is called with
-+	 * and sometimes without i_mutex lock held. The following checks
-+	 * attempt to deduce when we need to add (and drop resp.) lock
-+	 * here. This relies on current (2.6.2) calling coventions:
-+	 *
-+	 *   lookup_hash is always run under i_mutex and is passing NULL
-+	 *   as nd
-+	 *
-+	 *   open(...,O_CREATE,...) calls _lookup_hash under i_mutex
-+	 *   and sets flags to LOOKUP_OPEN|LOOKUP_CREATE
-+	 *
-+	 *   all other invocations of ->d_revalidate seem to happen
-+	 *   outside of i_mutex
-+	 */
-+	need_lock = nd &&
-+	    (!(nd->flags & LOOKUP_CREATE) || (nd->flags & LOOKUP_PARENT));
-+
-+	if (need_lock)
-+		mutex_lock(&dir->i_mutex);
-+
-+	if (is_devfsd_or_child(fs_info)) {
-+		devfs_handle_t de = lookup_info->de;
-+		struct inode *inode;
-+
-+		DPRINTK(DEBUG_I_LOOKUP,
-+			"(%s): dentry: %p inode: %p de: %p by: \"%s\"\n",
-+			dentry->d_name.name, dentry, dentry->d_inode, de,
-+			current->comm);
-+		if (dentry->d_inode)
-+			goto out;
-+		if (de == NULL) {
-+			read_lock(&parent->u.dir.lock);
-+			de = _devfs_search_dir(parent, dentry->d_name.name,
-+					       dentry->d_name.len);
-+			read_unlock(&parent->u.dir.lock);
-+			if (de == NULL)
-+				goto out;
-+			lookup_info->de = de;
-+		}
-+		/*  Create an inode, now that the driver information is available  */
-+		inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry);
-+		if (!inode)
-+			goto out;
-+		DPRINTK(DEBUG_I_LOOKUP,
-+			"(%s): new VFS inode(%u): %p de: %p by: \"%s\"\n",
-+			de->name, de->inode.ino, inode, de, current->comm);
-+		d_instantiate(dentry, inode);
-+		goto out;
-+	}
-+	if (lookup_info == NULL)
-+		goto out;	/*  Early termination  */
-+	read_lock(&parent->u.dir.lock);
-+	if (dentry->d_fsdata) {
-+		set_current_state(TASK_UNINTERRUPTIBLE);
-+		add_wait_queue(&lookup_info->wait_queue, &wait);
-+		read_unlock(&parent->u.dir.lock);
-+		/* at this point it is always (hopefully) locked */
-+		mutex_unlock(&dir->i_mutex);
-+		schedule();
-+		mutex_lock(&dir->i_mutex);
-+		/*
-+		 * This does not need nor should remove wait from wait_queue.
-+		 * Wait queue head is never reused - nothing is ever added to it
-+		 * after all waiters have been waked up and head itself disappears
-+		 * very soon after it. Moreover it is local variable on stack that
-+		 * is likely to have already disappeared so any reference to it
-+		 * at this point is buggy.
-+		 */
-+
-+	} else
-+		read_unlock(&parent->u.dir.lock);
-+
-+      out:
-+	if (need_lock)
-+		mutex_unlock(&dir->i_mutex);
-+	return 1;
-+}				/*  End Function devfs_d_revalidate_wait  */
-+
-+/*  Inode operations for device entries follow  */
-+
-+static struct dentry *devfs_lookup(struct inode *dir, struct dentry *dentry,
-+				   struct nameidata *nd)
-+{
-+	struct devfs_entry tmp;	/*  Must stay in scope until devfsd idle again  */
-+	struct devfs_lookup_struct lookup_info;
-+	struct fs_info *fs_info = dir->i_sb->s_fs_info;
-+	struct devfs_entry *parent, *de;
-+	struct inode *inode;
-+	struct dentry *retval = NULL;
-+
-+	/*  Set up the dentry operations before anything else, to ensure cleaning
-+	   up on any error  */
-+	dentry->d_op = &devfs_dops;
-+	/*  First try to get the devfs entry for this directory  */
-+	parent = get_devfs_entry_from_vfs_inode(dir);
-+	DPRINTK(DEBUG_I_LOOKUP, "(%s): dentry: %p parent: %p by: \"%s\"\n",
-+		dentry->d_name.name, dentry, parent, current->comm);
-+	if (parent == NULL)
-+		return ERR_PTR(-ENOENT);
-+	read_lock(&parent->u.dir.lock);
-+	de = _devfs_search_dir(parent, dentry->d_name.name, dentry->d_name.len);
-+	read_unlock(&parent->u.dir.lock);
-+	lookup_info.de = de;
-+	init_waitqueue_head(&lookup_info.wait_queue);
-+	dentry->d_fsdata = &lookup_info;
-+	if (de == NULL) {	/*  Try with devfsd. For any kind of failure, leave a negative dentry
-+				   so someone else can deal with it (in the case where the sysadmin
-+				   does a mknod()). It's important to do this before hashing the
-+				   dentry, so that the devfsd queue is filled before revalidates
-+				   can start  */
-+		if (try_modload(parent, fs_info, dentry->d_name.name, dentry->d_name.len, &tmp) < 0) {	/*  Lookup event was not queued to devfsd  */
-+			d_add(dentry, NULL);
-+			return NULL;
-+		}
-+	}
-+	dentry->d_op = &devfs_wait_dops;
-+	d_add(dentry, NULL);	/*  Open the floodgates  */
-+	/*  Unlock directory semaphore, which will release any waiters. They
-+	   will get the hashed dentry, and may be forced to wait for
-+	   revalidation  */
-+	mutex_unlock(&dir->i_mutex);
-+	wait_for_devfsd_finished(fs_info);	/*  If I'm not devfsd, must wait  */
-+	mutex_lock(&dir->i_mutex);	/*  Grab it again because them's the rules  */
-+	de = lookup_info.de;
-+	/*  If someone else has been so kind as to make the inode, we go home
-+	   early  */
-+	if (dentry->d_inode)
-+		goto out;
-+	if (de == NULL) {
-+		read_lock(&parent->u.dir.lock);
-+		de = _devfs_search_dir(parent, dentry->d_name.name,
-+				       dentry->d_name.len);
-+		read_unlock(&parent->u.dir.lock);
-+		if (de == NULL)
-+			goto out;
-+		/*  OK, there's an entry now, but no VFS inode yet  */
-+	}
-+	/*  Create an inode, now that the driver information is available  */
-+	inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry);
-+	if (!inode) {
-+		retval = ERR_PTR(-ENOMEM);
-+		goto out;
-+	}
-+	DPRINTK(DEBUG_I_LOOKUP,
-+		"(%s): new VFS inode(%u): %p de: %p by: \"%s\"\n", de->name,
-+		de->inode.ino, inode, de, current->comm);
-+	d_instantiate(dentry, inode);
-+      out:
-+	write_lock(&parent->u.dir.lock);
-+	dentry->d_op = &devfs_dops;
-+	dentry->d_fsdata = NULL;
-+	wake_up(&lookup_info.wait_queue);
-+	write_unlock(&parent->u.dir.lock);
-+	devfs_put(de);
-+	return retval;
-+}				/*  End Function devfs_lookup  */
-+
-+static int devfs_unlink(struct inode *dir, struct dentry *dentry)
-+{
-+	int unhooked;
-+	struct devfs_entry *de;
-+	struct inode *inode = dentry->d_inode;
-+	struct fs_info *fs_info = dir->i_sb->s_fs_info;
-+
-+	de = get_devfs_entry_from_vfs_inode(inode);
-+	DPRINTK(DEBUG_I_UNLINK, "(%s): de: %p\n", dentry->d_name.name, de);
-+	if (de == NULL)
-+		return -ENOENT;
-+	if (!de->vfs)
-+		return -EPERM;
-+	write_lock(&de->parent->u.dir.lock);
-+	unhooked = _devfs_unhook(de);
-+	write_unlock(&de->parent->u.dir.lock);
-+	if (!unhooked)
-+		return -ENOENT;
-+	if (!is_devfsd_or_child(fs_info))
-+		devfsd_notify_de(de, DEVFSD_NOTIFY_DELETE, inode->i_mode,
-+				 inode->i_uid, inode->i_gid, fs_info);
-+	free_dentry(de);
-+	devfs_put(de);
-+	return 0;
-+}				/*  End Function devfs_unlink  */
-+
-+static int devfs_symlink(struct inode *dir, struct dentry *dentry,
-+			 const char *symname)
-+{
-+	int err;
-+	struct fs_info *fs_info = dir->i_sb->s_fs_info;
-+	struct devfs_entry *parent, *de;
-+	struct inode *inode;
-+
-+	/*  First try to get the devfs entry for this directory  */
-+	parent = get_devfs_entry_from_vfs_inode(dir);
-+	if (parent == NULL)
-+		return -ENOENT;
-+	err = devfs_do_symlink(parent, dentry->d_name.name, symname, &de);
-+	DPRINTK(DEBUG_DISABLED, "(%s): errcode from <devfs_do_symlink>: %d\n",
-+		dentry->d_name.name, err);
-+	if (err < 0)
-+		return err;
-+	de->vfs = TRUE;
-+	de->inode.uid = current->euid;
-+	de->inode.gid = current->egid;
-+	de->inode.atime = CURRENT_TIME;
-+	de->inode.mtime = CURRENT_TIME;
-+	de->inode.ctime = CURRENT_TIME;
-+	if ((inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry)) == NULL)
-+		return -ENOMEM;
-+	DPRINTK(DEBUG_DISABLED, "(%s): new VFS inode(%u): %p  dentry: %p\n",
-+		dentry->d_name.name, de->inode.ino, inode, dentry);
-+	d_instantiate(dentry, inode);
-+	if (!is_devfsd_or_child(fs_info))
-+		devfsd_notify_de(de, DEVFSD_NOTIFY_CREATE, inode->i_mode,
-+				 inode->i_uid, inode->i_gid, fs_info);
-+	return 0;
-+}				/*  End Function devfs_symlink  */
-+
-+static int devfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
-+{
-+	int err;
-+	struct fs_info *fs_info = dir->i_sb->s_fs_info;
-+	struct devfs_entry *parent, *de;
-+	struct inode *inode;
-+
-+	mode = (mode & ~S_IFMT) | S_IFDIR;	/*  VFS doesn't pass S_IFMT part  */
-+	parent = get_devfs_entry_from_vfs_inode(dir);
-+	if (parent == NULL)
-+		return -ENOENT;
-+	de = _devfs_alloc_entry(dentry->d_name.name, dentry->d_name.len, mode);
-+	if (!de)
-+		return -ENOMEM;
-+	de->vfs = TRUE;
-+	if ((err = _devfs_append_entry(parent, de, NULL)) != 0)
-+		return err;
-+	de->inode.uid = current->euid;
-+	de->inode.gid = current->egid;
-+	de->inode.atime = CURRENT_TIME;
-+	de->inode.mtime = CURRENT_TIME;
-+	de->inode.ctime = CURRENT_TIME;
-+	if ((inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry)) == NULL)
-+		return -ENOMEM;
-+	DPRINTK(DEBUG_DISABLED, "(%s): new VFS inode(%u): %p  dentry: %p\n",
-+		dentry->d_name.name, de->inode.ino, inode, dentry);
-+	d_instantiate(dentry, inode);
-+	if (!is_devfsd_or_child(fs_info))
-+		devfsd_notify_de(de, DEVFSD_NOTIFY_CREATE, inode->i_mode,
-+				 inode->i_uid, inode->i_gid, fs_info);
-+	return 0;
-+}				/*  End Function devfs_mkdir  */
-+
-+static int devfs_rmdir(struct inode *dir, struct dentry *dentry)
-+{
-+	int err = 0;
-+	struct devfs_entry *de;
-+	struct fs_info *fs_info = dir->i_sb->s_fs_info;
-+	struct inode *inode = dentry->d_inode;
-+
-+	if (dir->i_sb->s_fs_info != inode->i_sb->s_fs_info)
-+		return -EINVAL;
-+	de = get_devfs_entry_from_vfs_inode(inode);
-+	if (de == NULL)
-+		return -ENOENT;
-+	if (!S_ISDIR(de->mode))
-+		return -ENOTDIR;
-+	if (!de->vfs)
-+		return -EPERM;
-+	/*  First ensure the directory is empty and will stay that way  */
-+	write_lock(&de->u.dir.lock);
-+	if (de->u.dir.first)
-+		err = -ENOTEMPTY;
-+	else
-+		de->u.dir.no_more_additions = TRUE;
-+	write_unlock(&de->u.dir.lock);
-+	if (err)
-+		return err;
-+	/*  Now unhook the directory from its parent  */
-+	write_lock(&de->parent->u.dir.lock);
-+	if (!_devfs_unhook(de))
-+		err = -ENOENT;
-+	write_unlock(&de->parent->u.dir.lock);
-+	if (err)
-+		return err;
-+	if (!is_devfsd_or_child(fs_info))
-+		devfsd_notify_de(de, DEVFSD_NOTIFY_DELETE, inode->i_mode,
-+				 inode->i_uid, inode->i_gid, fs_info);
-+	free_dentry(de);
-+	devfs_put(de);
-+	return 0;
-+}				/*  End Function devfs_rmdir  */
-+
-+static int devfs_mknod(struct inode *dir, struct dentry *dentry, int mode,
-+		       dev_t rdev)
-+{
-+	int err;
-+	struct fs_info *fs_info = dir->i_sb->s_fs_info;
-+	struct devfs_entry *parent, *de;
-+	struct inode *inode;
-+
-+	DPRINTK(DEBUG_I_MKNOD, "(%s): mode: 0%o  dev: %u:%u\n",
-+		dentry->d_name.name, mode, MAJOR(rdev), MINOR(rdev));
-+	parent = get_devfs_entry_from_vfs_inode(dir);
-+	if (parent == NULL)
-+		return -ENOENT;
-+	de = _devfs_alloc_entry(dentry->d_name.name, dentry->d_name.len, mode);
-+	if (!de)
-+		return -ENOMEM;
-+	de->vfs = TRUE;
-+	if (S_ISCHR(mode) || S_ISBLK(mode))
-+		de->u.dev = rdev;
-+	if ((err = _devfs_append_entry(parent, de, NULL)) != 0)
-+		return err;
-+	de->inode.uid = current->euid;
-+	de->inode.gid = current->egid;
-+	de->inode.atime = CURRENT_TIME;
-+	de->inode.mtime = CURRENT_TIME;
-+	de->inode.ctime = CURRENT_TIME;
-+	if ((inode = _devfs_get_vfs_inode(dir->i_sb, de, dentry)) == NULL)
-+		return -ENOMEM;
-+	DPRINTK(DEBUG_I_MKNOD, ":   new VFS inode(%u): %p  dentry: %p\n",
-+		de->inode.ino, inode, dentry);
-+	d_instantiate(dentry, inode);
-+	if (!is_devfsd_or_child(fs_info))
-+		devfsd_notify_de(de, DEVFSD_NOTIFY_CREATE, inode->i_mode,
-+				 inode->i_uid, inode->i_gid, fs_info);
-+	return 0;
-+}				/*  End Function devfs_mknod  */
-+
-+static void *devfs_follow_link(struct dentry *dentry, struct nameidata *nd)
-+{
-+	struct devfs_entry *p = get_devfs_entry_from_vfs_inode(dentry->d_inode);
-+	nd_set_link(nd, p ? p->u.symlink.linkname : ERR_PTR(-ENODEV));
-+	return NULL;
-+}				/*  End Function devfs_follow_link  */
-+
-+static struct inode_operations devfs_iops = {
-+	.setattr = devfs_notify_change,
-+};
-+
-+static struct inode_operations devfs_dir_iops = {
-+	.lookup = devfs_lookup,
-+	.unlink = devfs_unlink,
-+	.symlink = devfs_symlink,
-+	.mkdir = devfs_mkdir,
-+	.rmdir = devfs_rmdir,
-+	.mknod = devfs_mknod,
-+	.setattr = devfs_notify_change,
-+};
-+
-+static struct inode_operations devfs_symlink_iops = {
-+	.readlink = generic_readlink,
-+	.follow_link = devfs_follow_link,
-+	.setattr = devfs_notify_change,
-+};
-+
-+static int devfs_fill_super(struct super_block *sb, void *data, int silent)
-+{
-+	struct inode *root_inode = NULL;
-+
-+	if (_devfs_get_root_entry() == NULL)
-+		goto out_no_root;
-+	atomic_set(&fs_info.devfsd_overrun_count, 0);
-+	init_waitqueue_head(&fs_info.devfsd_wait_queue);
-+	init_waitqueue_head(&fs_info.revalidate_wait_queue);
-+	fs_info.sb = sb;
-+	sb->s_fs_info = &fs_info;
-+	sb->s_blocksize = 1024;
-+	sb->s_blocksize_bits = 10;
-+	sb->s_magic = DEVFS_SUPER_MAGIC;
-+	sb->s_op = &devfs_sops;
-+	sb->s_time_gran = 1;
-+	if ((root_inode = _devfs_get_vfs_inode(sb, root_entry, NULL)) == NULL)
-+		goto out_no_root;
-+	sb->s_root = d_alloc_root(root_inode);
-+	if (!sb->s_root)
-+		goto out_no_root;
-+	DPRINTK(DEBUG_S_READ, "(): made devfs ptr: %p\n", sb->s_fs_info);
-+	return 0;
-+
-+      out_no_root:
-+	PRINTK("(): get root inode failed\n");
-+	if (root_inode)
-+		iput(root_inode);
-+	return -EINVAL;
-+}				/*  End Function devfs_fill_super  */
-+
-+static int devfs_get_sb(struct file_system_type *fs_type,
-+					int flags, const char *dev_name,
-+					void *data, struct vfsmount *mnt)
-+{
-+	return get_sb_single(fs_type, flags, data, devfs_fill_super, mnt);
-+}
-+
-+static struct file_system_type devfs_fs_type = {
-+	.name = DEVFS_NAME,
-+	.get_sb = devfs_get_sb,
-+	.kill_sb = kill_anon_super,
-+};
-+
-+/*  File operations for devfsd follow  */
-+
-+static ssize_t devfsd_read(struct file *file, char __user *buf, size_t len,
-+			   loff_t * ppos)
-+{
-+	int done = FALSE;
-+	int ival;
-+	loff_t pos, devname_offset, tlen, rpos;
-+	devfs_handle_t de;
-+	struct devfsd_buf_entry *entry;
-+	struct fs_info *fs_info = file->f_dentry->d_inode->i_sb->s_fs_info;
-+	struct devfsd_notify_struct *info = fs_info->devfsd_info;
-+	DECLARE_WAITQUEUE(wait, current);
-+
-+	/*  Verify the task has grabbed the queue  */
-+	if (fs_info->devfsd_task != current)
-+		return -EPERM;
-+	info->major = 0;
-+	info->minor = 0;
-+	/*  Block for a new entry  */
-+	set_current_state(TASK_INTERRUPTIBLE);
-+	add_wait_queue(&fs_info->devfsd_wait_queue, &wait);
-+	while (devfsd_queue_empty(fs_info)) {
-+		fs_info->devfsd_sleeping = TRUE;
-+		wake_up(&fs_info->revalidate_wait_queue);
-+		schedule();
-+		fs_info->devfsd_sleeping = FALSE;
-+		if (signal_pending(current)) {
-+			remove_wait_queue(&fs_info->devfsd_wait_queue, &wait);
-+			__set_current_state(TASK_RUNNING);
-+			return -EINTR;
-+		}
-+		set_current_state(TASK_INTERRUPTIBLE);
-+	}
-+	remove_wait_queue(&fs_info->devfsd_wait_queue, &wait);
-+	__set_current_state(TASK_RUNNING);
-+	/*  Now play with the data  */
-+	ival = atomic_read(&fs_info->devfsd_overrun_count);
-+	info->overrun_count = ival;
-+	entry = fs_info->devfsd_first_event;
-+	info->type = entry->type;
-+	info->mode = entry->mode;
-+	info->uid = entry->uid;
-+	info->gid = entry->gid;
-+	de = entry->de;
-+	if (S_ISCHR(de->mode) || S_ISBLK(de->mode)) {
-+		info->major = MAJOR(de->u.dev);
-+		info->minor = MINOR(de->u.dev);
-+	}
-+	pos = devfs_generate_path(de, info->devname, DEVFS_PATHLEN);
-+	if (pos < 0)
-+		return pos;
-+	info->namelen = DEVFS_PATHLEN - pos - 1;
-+	if (info->mode == 0)
-+		info->mode = de->mode;
-+	devname_offset = info->devname - (char *)info;
-+	rpos = *ppos;
-+	if (rpos < devname_offset) {
-+		/*  Copy parts of the header  */
-+		tlen = devname_offset - rpos;
-+		if (tlen > len)
-+			tlen = len;
-+		if (copy_to_user(buf, (char *)info + rpos, tlen)) {
-+			return -EFAULT;
-+		}
-+		rpos += tlen;
-+		buf += tlen;
-+		len -= tlen;
-+	}
-+	if ((rpos >= devname_offset) && (len > 0)) {
-+		/*  Copy the name  */
-+		tlen = info->namelen + 1;
-+		if (tlen > len)
-+			tlen = len;
-+		else
-+			done = TRUE;
-+		if (copy_to_user
-+		    (buf, info->devname + pos + rpos - devname_offset, tlen)) {
-+			return -EFAULT;
-+		}
-+		rpos += tlen;
-+	}
-+	tlen = rpos - *ppos;
-+	if (done) {
-+		devfs_handle_t parent;
-+
-+		spin_lock(&fs_info->devfsd_buffer_lock);
-+		fs_info->devfsd_first_event = entry->next;
-+		if (entry->next == NULL)
-+			fs_info->devfsd_last_event = NULL;
-+		spin_unlock(&fs_info->devfsd_buffer_lock);
-+		for (; de != NULL; de = parent) {
-+			parent = de->parent;
-+			devfs_put(de);
-+		}
-+		kmem_cache_free(devfsd_buf_cache, entry);
-+		if (ival > 0)
-+			atomic_sub(ival, &fs_info->devfsd_overrun_count);
-+		*ppos = 0;
-+	} else
-+		*ppos = rpos;
-+	return tlen;
-+}				/*  End Function devfsd_read  */
-+
-+static int devfsd_ioctl(struct inode *inode, struct file *file,
-+			unsigned int cmd, unsigned long arg)
-+{
-+	int ival;
-+	struct fs_info *fs_info = inode->i_sb->s_fs_info;
-+
-+	switch (cmd) {
-+	case DEVFSDIOC_GET_PROTO_REV:
-+		ival = DEVFSD_PROTOCOL_REVISION_KERNEL;
-+		if (copy_to_user((void __user *)arg, &ival, sizeof ival))
-+			return -EFAULT;
-+		break;
-+	case DEVFSDIOC_SET_EVENT_MASK:
-+		/*  Ensure only one reader has access to the queue. This scheme will
-+		   work even if the global kernel lock were to be removed, because it
-+		   doesn't matter who gets in first, as long as only one gets it  */
-+		if (fs_info->devfsd_task == NULL) {
-+			static DEFINE_SPINLOCK(lock);
-+
-+			if (!spin_trylock(&lock))
-+				return -EBUSY;
-+			if (fs_info->devfsd_task != NULL) {	/*  We lost the race...  */
-+				spin_unlock(&lock);
-+				return -EBUSY;
-+			}
-+			fs_info->devfsd_task = current;
-+			spin_unlock(&lock);
-+			fs_info->devfsd_pgrp =
-+			    (process_group(current) ==
-+			     current->pid) ? process_group(current) : 0;
-+			fs_info->devfsd_file = file;
-+			fs_info->devfsd_info =
-+			    kmalloc(sizeof *fs_info->devfsd_info, GFP_KERNEL);
-+			if (!fs_info->devfsd_info) {
-+				devfsd_close(inode, file);
-+				return -ENOMEM;
-+			}
-+		} else if (fs_info->devfsd_task != current)
-+			return -EBUSY;
-+		fs_info->devfsd_event_mask = arg;	/*  Let the masses come forth  */
-+		break;
-+	case DEVFSDIOC_RELEASE_EVENT_QUEUE:
-+		if (fs_info->devfsd_file != file)
-+			return -EPERM;
-+		return devfsd_close(inode, file);
-+		/*break; */
-+#ifdef CONFIG_DEVFS_DEBUG
-+	case DEVFSDIOC_SET_DEBUG_MASK:
-+		if (copy_from_user(&ival, (void __user *)arg, sizeof ival))
-+			return -EFAULT;
-+		devfs_debug = ival;
-+		break;
-+#endif
-+	default:
-+		return -ENOIOCTLCMD;
-+	}
-+	return 0;
-+}				/*  End Function devfsd_ioctl  */
-+
-+static int devfsd_close(struct inode *inode, struct file *file)
-+{
-+	struct devfsd_buf_entry *entry, *next;
-+	struct fs_info *fs_info = inode->i_sb->s_fs_info;
-+
-+	if (fs_info->devfsd_file != file)
-+		return 0;
-+	fs_info->devfsd_event_mask = 0;
-+	fs_info->devfsd_file = NULL;
-+	spin_lock(&fs_info->devfsd_buffer_lock);
-+	entry = fs_info->devfsd_first_event;
-+	fs_info->devfsd_first_event = NULL;
-+	fs_info->devfsd_last_event = NULL;
-+	kfree(fs_info->devfsd_info);
-+	fs_info->devfsd_info = NULL;
-+	spin_unlock(&fs_info->devfsd_buffer_lock);
-+	fs_info->devfsd_pgrp = 0;
-+	fs_info->devfsd_task = NULL;
-+	wake_up(&fs_info->revalidate_wait_queue);
-+	for (; entry; entry = next) {
-+		next = entry->next;
-+		kmem_cache_free(devfsd_buf_cache, entry);
-+	}
-+	return 0;
-+}				/*  End Function devfsd_close  */
-+
-+#ifdef CONFIG_DEVFS_DEBUG
-+static ssize_t stat_read(struct file *file, char __user *buf, size_t len,
-+			 loff_t * ppos)
-+{
-+	ssize_t num;
-+	char txt[80];
-+
-+	num = sprintf(txt, "Number of entries: %u  number of bytes: %u\n",
-+		      stat_num_entries, stat_num_bytes) + 1;
-+	if (*ppos >= num)
-+		return 0;
-+	if (*ppos + len > num)
-+		len = num - *ppos;
-+	if (copy_to_user(buf, txt + *ppos, len))
-+		return -EFAULT;
-+	*ppos += len;
-+	return len;
-+}				/*  End Function stat_read  */
-+#endif
-+
-+static int __init init_devfs_fs(void)
-+{
-+	int err;
-+	int major;
-+	struct devfs_entry *devfsd;
-+#ifdef CONFIG_DEVFS_DEBUG
-+	struct devfs_entry *stat;
-+#endif
-+
-+	if (_devfs_get_root_entry() == NULL)
-+		return -ENOMEM;
-+
-+	printk(KERN_INFO "%s: %s Richard Gooch (rgooch@atnf.csiro.au)\n",
-+	       DEVFS_NAME, DEVFS_VERSION);
-+	devfsd_buf_cache = kmem_cache_create("devfsd_event",
-+					     sizeof(struct devfsd_buf_entry),
-+					     0, 0, NULL, NULL);
-+	if (!devfsd_buf_cache)
-+		OOPS("(): unable to allocate event slab\n");
-+#ifdef CONFIG_DEVFS_DEBUG
-+	devfs_debug = devfs_debug_init;
-+	printk(KERN_INFO "%s: devfs_debug: 0x%0x\n", DEVFS_NAME, devfs_debug);
-+#endif
-+	printk(KERN_INFO "%s: boot_options: 0x%0x\n", DEVFS_NAME, boot_options);
-+
-+	/* register special device for devfsd communication */
-+	major = register_chrdev(0, "devfs", &devfs_fops);
-+	if (major < 0)
-+		return major;
-+
-+	/*  And create the entry for ".devfsd"  */
-+	devfsd = _devfs_alloc_entry(".devfsd", 0, S_IFCHR | S_IRUSR | S_IWUSR);
-+	if (devfsd == NULL)
-+		return -ENOMEM;
-+	devfsd->u.dev = MKDEV(major, 0);
-+	_devfs_append_entry(root_entry, devfsd, NULL);
-+
-+#ifdef CONFIG_DEVFS_DEBUG
-+	stat = _devfs_alloc_entry(".stat", 0, S_IFCHR | S_IRUGO);
-+	if (stat == NULL)
-+		return -ENOMEM;
-+	stat->u.dev = MKDEV(major, 1);
-+	_devfs_append_entry(root_entry, stat, NULL);
-+#endif
-+
-+	err = register_filesystem(&devfs_fs_type);
-+	return err;
-+}				/*  End Function init_devfs_fs  */
-+
-+void __init mount_devfs_fs(void)
-+{
-+	int err;
-+
-+	if (!(boot_options & OPTION_MOUNT))
-+		return;
-+	err = do_mount("none", "/dev", "devfs", 0, NULL);
-+	if (err == 0)
-+		printk(KERN_INFO "Mounted devfs on /dev\n");
-+	else
-+		PRINTK("(): unable to mount devfs, err: %d\n", err);
-+}				/*  End Function mount_devfs_fs  */
-+
-+module_init(init_devfs_fs)
-diff -urN linux-2.6.19.old/fs/devfs/Makefile linux-2.6.19.dev/fs/devfs/Makefile
---- linux-2.6.19.old/fs/devfs/Makefile	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.19.dev/fs/devfs/Makefile	2006-12-14 03:12:59.000000000 +0100
-@@ -0,0 +1,8 @@
-+#
-+# Makefile for the linux devfs-filesystem routines.
-+#
-+
-+obj-$(CONFIG_DEVFS_FS) += devfs.o
-+
-+devfs-objs := base.o util.o
-+
-diff -urN linux-2.6.19.old/fs/devfs/util.c linux-2.6.19.dev/fs/devfs/util.c
---- linux-2.6.19.old/fs/devfs/util.c	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.19.dev/fs/devfs/util.c	2006-12-14 03:12:59.000000000 +0100
-@@ -0,0 +1,97 @@
-+/*  devfs (Device FileSystem) utilities.
-+
-+    Copyright (C) 1999-2002  Richard Gooch
-+
-+    This library is free software; you can redistribute it and/or
-+    modify it under the terms of the GNU Library General Public
-+    License as published by the Free Software Foundation; either
-+    version 2 of the License, or (at your option) any later version.
-+
-+    This library is distributed in the hope that it will be useful,
-+    but WITHOUT ANY WARRANTY; without even the implied warranty of
-+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-+    Library General Public License for more details.
-+
-+    You should have received a copy of the GNU Library General Public
-+    License along with this library; if not, write to the Free
-+    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+
-+    Richard Gooch may be reached by email at  rgooch@atnf.csiro.au
-+    The postal address is:
-+      Richard Gooch, c/o ATNF, P. O. Box 76, Epping, N.S.W., 2121, Australia.
-+
-+    ChangeLog
-+
-+    19991031   Richard Gooch <rgooch@atnf.csiro.au>
-+               Created.
-+    19991103   Richard Gooch <rgooch@atnf.csiro.au>
-+               Created <_devfs_convert_name> and supported SCSI and IDE CD-ROMs
-+    20000203   Richard Gooch <rgooch@atnf.csiro.au>
-+               Changed operations pointer type to void *.
-+    20000621   Richard Gooch <rgooch@atnf.csiro.au>
-+               Changed interface to <devfs_register_series>.
-+    20000622   Richard Gooch <rgooch@atnf.csiro.au>
-+               Took account of interface change to <devfs_mk_symlink>.
-+               Took account of interface change to <devfs_mk_dir>.
-+    20010519   Richard Gooch <rgooch@atnf.csiro.au>
-+               Documentation cleanup.
-+    20010709   Richard Gooch <rgooch@atnf.csiro.au>
-+               Created <devfs_*alloc_major> and <devfs_*alloc_devnum>.
-+    20010710   Richard Gooch <rgooch@atnf.csiro.au>
-+               Created <devfs_*alloc_unique_number>.
-+    20010730   Richard Gooch <rgooch@atnf.csiro.au>
-+               Documentation typo fix.
-+    20010806   Richard Gooch <rgooch@atnf.csiro.au>
-+               Made <block_semaphore> and <char_semaphore> private.
-+    20010813   Richard Gooch <rgooch@atnf.csiro.au>
-+               Fixed bug in <devfs_alloc_unique_number>: limited to 128 numbers
-+    20010818   Richard Gooch <rgooch@atnf.csiro.au>
-+               Updated major masks up to Linus' "no new majors" proclamation.
-+	       Block: were 126 now 122 free, char: were 26 now 19 free.
-+    20020324   Richard Gooch <rgooch@atnf.csiro.au>
-+               Fixed bug in <devfs_alloc_unique_number>: was clearing beyond
-+	       bitfield.
-+    20020326   Richard Gooch <rgooch@atnf.csiro.au>
-+               Fixed bitfield data type for <devfs_*alloc_devnum>.
-+               Made major bitfield type and initialiser 64 bit safe.
-+    20020413   Richard Gooch <rgooch@atnf.csiro.au>
-+               Fixed shift warning on 64 bit machines.
-+    20020428   Richard Gooch <rgooch@atnf.csiro.au>
-+               Copied and used macro for error messages from fs/devfs/base.c 
-+    20021013   Richard Gooch <rgooch@atnf.csiro.au>
-+               Documentation fix.
-+    20030101   Adam J. Richter <adam@yggdrasil.com>
-+               Eliminate DEVFS_SPECIAL_{CHR,BLK}.  Use mode_t instead.
-+    20030106   Christoph Hellwig <hch@infradead.org>
-+               Rewrite devfs_{,de}alloc_devnum to look like C code.
-+*/
-+#include <linux/module.h>
-+#include <linux/init.h>
-+#include <linux/devfs_fs_kernel.h>
-+#include <linux/slab.h>
-+#include <linux/vmalloc.h>
-+#include <linux/genhd.h>
-+#include <linux/bitops.h>
-+
-+int devfs_register_tape(const char *name)
-+{
-+	char tname[32], dest[64];
-+	static unsigned int tape_counter;
-+	unsigned int n = tape_counter++;
-+
-+	sprintf(dest, "../%s", name);
-+	sprintf(tname, "tapes/tape%u", n);
-+	devfs_mk_symlink(tname, dest);
-+
-+	return n;
-+}
-+
-+EXPORT_SYMBOL(devfs_register_tape);
-+
-+void devfs_unregister_tape(int num)
-+{
-+	if (num >= 0)
-+		devfs_remove("tapes/tape%u", num);
-+}
-+
-+EXPORT_SYMBOL(devfs_unregister_tape);
-diff -urN linux-2.6.19.old/fs/Kconfig linux-2.6.19.dev/fs/Kconfig
---- linux-2.6.19.old/fs/Kconfig	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/fs/Kconfig	2006-12-14 03:12:59.000000000 +0100
-@@ -957,6 +957,56 @@
- 	  building a kernel for install/rescue disks or your system is very
- 	  limited in memory.
- 
-+config DEVFS_FS
-+	bool "/dev file system support (OBSOLETE)"
-+	depends on EXPERIMENTAL
-+	help
-+	  This is support for devfs, a virtual file system (like /proc) which
-+	  provides the file system interface to device drivers, normally found
-+	  in /dev. Devfs does not depend on major and minor number
-+	  allocations. Device drivers register entries in /dev which then
-+	  appear automatically, which means that the system administrator does
-+	  not have to create character and block special device files in the
-+	  /dev directory using the mknod command (or MAKEDEV script) anymore.
-+
-+	  This is work in progress. If you want to use this, you *must* read
-+	  the material in <file:Documentation/filesystems/devfs/>, especially
-+	  the file README there.
-+
-+	  Note that devfs no longer manages /dev/pts!  If you are using UNIX98
-+	  ptys, you will also need to mount the /dev/pts filesystem (devpts).
-+
-+	  Note that devfs has been obsoleted by udev,
-+	  <http://www.kernel.org/pub/linux/utils/kernel/hotplug/>.
-+	  It has been stripped down to a bare minimum and is only provided for
-+	  legacy installations that use its naming scheme which is
-+	  unfortunately different from the names normal Linux installations
-+	  use.
-+
-+	  If unsure, say N.
-+
-+config DEVFS_MOUNT
-+	bool "Automatically mount at boot"
-+	depends on DEVFS_FS
-+	help
-+	  This option appears if you have CONFIG_DEVFS_FS enabled. Setting
-+	  this to 'Y' will make the kernel automatically mount devfs onto /dev
-+	  when the system is booted, before the init thread is started.
-+	  You can override this with the "devfs=nomount" boot option.
-+
-+	  If unsure, say N.
-+
-+config DEVFS_DEBUG
-+	bool "Debug devfs"
-+	depends on DEVFS_FS
-+	help
-+	  If you say Y here, then the /dev file system code will generate
-+	  debugging messages. See the file
-+	  <file:Documentation/filesystems/devfs/boot-options> for more
-+	  details.
-+
-+	  If unsure, say N.
-+
- config SYSFS
- 	bool "sysfs file system support" if EMBEDDED
- 	default y
-diff -urN linux-2.6.19.old/fs/Makefile linux-2.6.19.dev/fs/Makefile
---- linux-2.6.19.old/fs/Makefile	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/fs/Makefile	2006-12-14 03:12:59.000000000 +0100
-@@ -76,6 +76,7 @@
- obj-$(CONFIG_VFAT_FS)		+= vfat/
- obj-$(CONFIG_BFS_FS)		+= bfs/
- obj-$(CONFIG_ISO9660_FS)	+= isofs/
-+obj-$(CONFIG_DEVFS_FS)		+= devfs/
- obj-$(CONFIG_HFSPLUS_FS)	+= hfsplus/ # Before hfs to find wrapped HFS+
- obj-$(CONFIG_HFS_FS)		+= hfs/
- obj-$(CONFIG_ECRYPT_FS)		+= ecryptfs/
-diff -urN linux-2.6.19.old/fs/partitions/check.c linux-2.6.19.dev/fs/partitions/check.c
---- linux-2.6.19.old/fs/partitions/check.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/fs/partitions/check.c	2006-12-14 03:12:59.000000000 +0100
-@@ -18,8 +18,10 @@
- #include <linux/fs.h>
- #include <linux/kmod.h>
- #include <linux/ctype.h>
-+#include <linux/devfs_fs_kernel.h>
- 
- #include "check.h"
-+#include "devfs.h"
- 
- #include "acorn.h"
- #include "amiga.h"
-@@ -159,11 +161,18 @@
- 	if (!state)
- 		return NULL;
- 
--	disk_name(hd, 0, state->name);
--	printk(KERN_INFO " %s:", state->name);
--	if (isdigit(state->name[strlen(state->name)-1]))
-+#ifdef CONFIG_DEVFS_FS
-+	if (hd->devfs_name[0] != '\0') {
-+		printk(KERN_INFO " /dev/%s:", hd->devfs_name);
- 		sprintf(state->name, "p");
--
-+	}
-+#endif
-+	else {
-+		disk_name(hd, 0, state->name);
-+		printk(KERN_INFO " %s:", state->name);
-+		if (isdigit(state->name[strlen(state->name)-1]))
-+			sprintf(state->name, "p");
-+	}
- 	state->limit = hd->minors;
- 	i = res = 0;
- 	while (!res && check_part[i]) {
-@@ -319,7 +328,7 @@
- 	p->nr_sects = 0;
- 	p->ios[0] = p->ios[1] = 0;
- 	p->sectors[0] = p->sectors[1] = 0;
--	sysfs_remove_link(&p->kobj, "subsystem");
-+	devfs_remove("%s/part%d", disk->devfs_name, part);
- 	if (p->holder_dir)
- 		kobject_unregister(p->holder_dir);
- 	kobject_uevent(&p->kobj, KOBJ_REMOVE);
-@@ -339,7 +348,10 @@
- 	p->start_sect = start;
- 	p->nr_sects = len;
- 	p->partno = part;
--	p->policy = disk->policy;
-+
-+	devfs_mk_bdev(MKDEV(disk->major, disk->first_minor + part),
-+			S_IFBLK|S_IRUSR|S_IWUSR,
-+			"%s/part%d", disk->devfs_name, part);
- 
- 	if (isdigit(disk->kobj.name[strlen(disk->kobj.name)-1]))
- 		snprintf(p->kobj.name,KOBJ_NAME_LEN,"%sp%d",disk->kobj.name,part);
-@@ -444,8 +456,14 @@
-  	disk_sysfs_add_subdirs(disk);
- 
- 	/* No minors to use for partitions */
--	if (disk->minors == 1)
-+	if (disk->minors == 1) {
-+		if (disk->devfs_name[0] != '\0')
-+			devfs_add_disk(disk);
- 		goto exit;
-+	}
-+
-+	/* always add handle for the whole disk */
-+	devfs_add_partitioned(disk);
- 
- 	/* No such device (e.g., media were just removed) */
- 	if (!get_capacity(disk))
-@@ -553,6 +571,8 @@
- 	disk_stat_set_all(disk, 0);
- 	disk->stamp = 0;
- 
-+	devfs_remove_disk(disk);
-+
- 	kobject_uevent(&disk->kobj, KOBJ_REMOVE);
- 	if (disk->holder_dir)
- 		kobject_unregister(disk->holder_dir);
-diff -urN linux-2.6.19.old/fs/partitions/devfs.c linux-2.6.19.dev/fs/partitions/devfs.c
---- linux-2.6.19.old/fs/partitions/devfs.c	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.19.dev/fs/partitions/devfs.c	2006-12-14 03:12:59.000000000 +0100
-@@ -0,0 +1,130 @@
-+/*
-+ * This tries to keep block devices away from devfs as much as possible.
-+ */
-+#include <linux/fs.h>
-+#include <linux/devfs_fs_kernel.h>
-+#include <linux/vmalloc.h>
-+#include <linux/genhd.h>
-+#include <linux/bitops.h>
-+#include <linux/mutex.h>
-+
-+
-+struct unique_numspace {
-+	u32		  num_free;          /*  Num free in bits       */
-+	u32		  length;            /*  Array length in bytes  */
-+	unsigned long	  *bits;
-+	struct semaphore  mutex;
-+};
-+
-+static DEFINE_MUTEX(numspace_mutex);
-+
-+static int expand_numspace(struct unique_numspace *s)
-+{
-+	u32 length;
-+	void *bits;
-+
-+	if (s->length < 16)
-+		length = 16;
-+	else
-+		length = s->length << 1;
-+
-+	bits = vmalloc(length);
-+	if (!bits)
-+		return -ENOMEM;
-+	if (s->bits) {
-+		memcpy(bits, s->bits, s->length);
-+		vfree(s->bits);
-+	}
-+		
-+	s->num_free = (length - s->length) << 3;
-+	s->bits = bits;
-+	memset(bits + s->length, 0, length - s->length);
-+	s->length = length;
-+
-+	return 0;
-+}
-+
-+static int alloc_unique_number(struct unique_numspace *s)
-+{
-+	int rval = 0;
-+
-+	mutex_lock(&numspace_mutex);
-+	if (s->num_free < 1)
-+		rval = expand_numspace(s);
-+	if (!rval) {
-+		rval = find_first_zero_bit(s->bits, s->length << 3);
-+		--s->num_free;
-+		__set_bit(rval, s->bits);
-+	}
-+	mutex_unlock(&numspace_mutex);
-+
-+	return rval;
-+}
-+
-+static void dealloc_unique_number(struct unique_numspace *s, int number)
-+{
-+	int old_val;
-+
-+	if (number >= 0) {
-+		mutex_lock(&numspace_mutex);
-+		old_val = __test_and_clear_bit(number, s->bits);
-+		if (old_val)
-+			++s->num_free;
-+		mutex_unlock(&numspace_mutex);
-+	}
-+}
-+
-+static struct unique_numspace disc_numspace;
-+static struct unique_numspace cdrom_numspace;
-+
-+void devfs_add_partitioned(struct gendisk *disk)
-+{
-+	char dirname[64], symlink[16];
-+
-+	devfs_mk_dir(disk->devfs_name);
-+	devfs_mk_bdev(MKDEV(disk->major, disk->first_minor),
-+			S_IFBLK|S_IRUSR|S_IWUSR,
-+			"%s/disc", disk->devfs_name);
-+
-+	disk->number = alloc_unique_number(&disc_numspace);
-+
-+	sprintf(symlink, "discs/disc%d", disk->number);
-+	sprintf(dirname, "../%s", disk->devfs_name);
-+	devfs_mk_symlink(symlink, dirname);
-+
-+}
-+
-+void devfs_add_disk(struct gendisk *disk)
-+{
-+	devfs_mk_bdev(MKDEV(disk->major, disk->first_minor),
-+			(disk->flags & GENHD_FL_CD) ?
-+				S_IFBLK|S_IRUGO|S_IWUGO :
-+				S_IFBLK|S_IRUSR|S_IWUSR,
-+			"%s", disk->devfs_name);
-+
-+	if (disk->flags & GENHD_FL_CD) {
-+		char dirname[64], symlink[16];
-+
-+		disk->number = alloc_unique_number(&cdrom_numspace);
-+
-+		sprintf(symlink, "cdroms/cdrom%d", disk->number);
-+		sprintf(dirname, "../%s", disk->devfs_name);
-+		devfs_mk_symlink(symlink, dirname);
-+	}
-+}
-+
-+void devfs_remove_disk(struct gendisk *disk)
-+{
-+	if (disk->minors != 1) {
-+		devfs_remove("discs/disc%d", disk->number);
-+		dealloc_unique_number(&disc_numspace, disk->number);
-+		devfs_remove("%s/disc", disk->devfs_name);
-+	}
-+	if (disk->flags & GENHD_FL_CD) {
-+		devfs_remove("cdroms/cdrom%d", disk->number);
-+		dealloc_unique_number(&cdrom_numspace, disk->number);
-+	}
-+	devfs_remove(disk->devfs_name);
-+}
-+
-+
-diff -urN linux-2.6.19.old/fs/partitions/devfs.h linux-2.6.19.dev/fs/partitions/devfs.h
---- linux-2.6.19.old/fs/partitions/devfs.h	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.19.dev/fs/partitions/devfs.h	2006-12-14 03:12:59.000000000 +0100
-@@ -0,0 +1,10 @@
-+
-+#ifdef CONFIG_DEVFS_FS
-+void devfs_add_disk(struct gendisk *dev);
-+void devfs_add_partitioned(struct gendisk *dev);
-+void devfs_remove_disk(struct gendisk *dev);
-+#else
-+# define devfs_add_disk(disk)			do { } while (0)
-+# define devfs_add_partitioned(disk)		do { } while (0)
-+# define devfs_remove_disk(disk)		do { } while (0)
-+#endif
-diff -urN linux-2.6.19.old/fs/partitions/Makefile linux-2.6.19.dev/fs/partitions/Makefile
---- linux-2.6.19.old/fs/partitions/Makefile	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/fs/partitions/Makefile	2006-12-14 03:12:59.000000000 +0100
-@@ -4,6 +4,7 @@
- 
- obj-$(CONFIG_BLOCK) := check.o
- 
-+obj-$(CONFIG_DEVFS_FS) += devfs.o
- obj-$(CONFIG_ACORN_PARTITION) += acorn.o
- obj-$(CONFIG_AMIGA_PARTITION) += amiga.o
- obj-$(CONFIG_ATARI_PARTITION) += atari.o
-diff -urN linux-2.6.19.old/include/asm-ppc/ocp.h linux-2.6.19.dev/include/asm-ppc/ocp.h
---- linux-2.6.19.old/include/asm-ppc/ocp.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/include/asm-ppc/ocp.h	2006-12-14 03:12:59.000000000 +0100
-@@ -26,6 +26,7 @@
- 
- #include <linux/init.h>
- #include <linux/list.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/device.h>
- 
- #include <asm/mmu.h>
-diff -urN linux-2.6.19.old/include/linux/compat_ioctl.h linux-2.6.19.dev/include/linux/compat_ioctl.h
---- linux-2.6.19.old/include/linux/compat_ioctl.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/include/linux/compat_ioctl.h	2006-12-14 03:12:59.000000000 +0100
-@@ -571,6 +571,11 @@
- COMPATIBLE_IOCTL(AUTOFS_IOC_ASKREGHOST)
- COMPATIBLE_IOCTL(AUTOFS_IOC_TOGGLEREGHOST)
- COMPATIBLE_IOCTL(AUTOFS_IOC_ASKUMOUNT)
-+/* DEVFS */
-+COMPATIBLE_IOCTL(DEVFSDIOC_GET_PROTO_REV)
-+COMPATIBLE_IOCTL(DEVFSDIOC_SET_EVENT_MASK)
-+COMPATIBLE_IOCTL(DEVFSDIOC_RELEASE_EVENT_QUEUE)
-+COMPATIBLE_IOCTL(DEVFSDIOC_SET_DEBUG_MASK)
- /* Raw devices */
- COMPATIBLE_IOCTL(RAW_SETBIND)
- COMPATIBLE_IOCTL(RAW_GETBIND)
-diff -urN linux-2.6.19.old/include/linux/devfs_fs.h linux-2.6.19.dev/include/linux/devfs_fs.h
---- linux-2.6.19.old/include/linux/devfs_fs.h	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.19.dev/include/linux/devfs_fs.h	2006-12-14 03:12:59.000000000 +0100
-@@ -0,0 +1,41 @@
-+#ifndef _LINUX_DEVFS_FS_H
-+#define _LINUX_DEVFS_FS_H
-+
-+#include <linux/ioctl.h>
-+
-+#define DEVFSD_PROTOCOL_REVISION_KERNEL  5
-+
-+#define	DEVFSD_IOCTL_BASE	'd'
-+
-+/*  These are the various ioctls  */
-+#define DEVFSDIOC_GET_PROTO_REV         _IOR(DEVFSD_IOCTL_BASE, 0, int)
-+#define DEVFSDIOC_SET_EVENT_MASK        _IOW(DEVFSD_IOCTL_BASE, 2, int)
-+#define DEVFSDIOC_RELEASE_EVENT_QUEUE   _IOW(DEVFSD_IOCTL_BASE, 3, int)
-+#define DEVFSDIOC_SET_DEBUG_MASK        _IOW(DEVFSD_IOCTL_BASE, 4, int)
-+
-+#define DEVFSD_NOTIFY_REGISTERED    0
-+#define DEVFSD_NOTIFY_UNREGISTERED  1
-+#define DEVFSD_NOTIFY_ASYNC_OPEN    2
-+#define DEVFSD_NOTIFY_CLOSE         3
-+#define DEVFSD_NOTIFY_LOOKUP        4
-+#define DEVFSD_NOTIFY_CHANGE        5
-+#define DEVFSD_NOTIFY_CREATE        6
-+#define DEVFSD_NOTIFY_DELETE        7
-+
-+#define DEVFS_PATHLEN               1024	/*  Never change this otherwise the
-+						   binary interface will change   */
-+
-+struct devfsd_notify_struct {	/*  Use native C types to ensure same types in kernel and user space     */
-+	unsigned int type;	/*  DEVFSD_NOTIFY_* value                   */
-+	unsigned int mode;	/*  Mode of the inode or device entry       */
-+	unsigned int major;	/*  Major number of device entry            */
-+	unsigned int minor;	/*  Minor number of device entry            */
-+	unsigned int uid;	/*  Uid of process, inode or device entry   */
-+	unsigned int gid;	/*  Gid of process, inode or device entry   */
-+	unsigned int overrun_count;	/*  Number of lost events                   */
-+	unsigned int namelen;	/*  Number of characters not including '\0' */
-+	/*  The device name MUST come last                                       */
-+	char devname[DEVFS_PATHLEN];	/*  This will be '\0' terminated            */
-+};
-+
-+#endif				/*  _LINUX_DEVFS_FS_H  */
-diff -urN linux-2.6.19.old/include/linux/devfs_fs_kernel.h linux-2.6.19.dev/include/linux/devfs_fs_kernel.h
---- linux-2.6.19.old/include/linux/devfs_fs_kernel.h	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.19.dev/include/linux/devfs_fs_kernel.h	2006-12-14 03:12:59.000000000 +0100
-@@ -0,0 +1,58 @@
-+#ifndef _LINUX_DEVFS_FS_KERNEL_H
-+#define _LINUX_DEVFS_FS_KERNEL_H
-+
-+#include <linux/fs.h>
-+#include <linux/autoconf.h>
-+#include <linux/spinlock.h>
-+#include <linux/types.h>
-+
-+#include <asm/semaphore.h>
-+
-+#define DEVFS_SUPER_MAGIC                0x1373
-+
-+#ifdef CONFIG_DEVFS_FS
-+extern int devfs_mk_bdev(dev_t dev, umode_t mode, const char *fmt, ...)
-+    __attribute__ ((format(printf, 3, 4)));
-+extern int devfs_mk_cdev(dev_t dev, umode_t mode, const char *fmt, ...)
-+    __attribute__ ((format(printf, 3, 4)));
-+extern int devfs_mk_symlink(const char *name, const char *link);
-+extern int devfs_mk_dir(const char *fmt, ...)
-+    __attribute__ ((format(printf, 1, 2)));
-+extern void devfs_remove(const char *fmt, ...)
-+    __attribute__ ((format(printf, 1, 2)));
-+extern int devfs_register_tape(const char *name);
-+extern void devfs_unregister_tape(int num);
-+extern void mount_devfs_fs(void);
-+#else				/*  CONFIG_DEVFS_FS  */
-+static inline int devfs_mk_bdev(dev_t dev, umode_t mode, const char *fmt, ...)
-+{
-+	return 0;
-+}
-+static inline int devfs_mk_cdev(dev_t dev, umode_t mode, const char *fmt, ...)
-+{
-+	return 0;
-+}
-+static inline int devfs_mk_symlink(const char *name, const char *link)
-+{
-+	return 0;
-+}
-+static inline int devfs_mk_dir(const char *fmt, ...)
-+{
-+	return 0;
-+}
-+static inline void devfs_remove(const char *fmt, ...)
-+{
-+}
-+static inline int devfs_register_tape(const char *name)
-+{
-+	return -1;
-+}
-+static inline void devfs_unregister_tape(int num)
-+{
-+}
-+static inline void mount_devfs_fs(void)
-+{
-+	return;
-+}
-+#endif				/*  CONFIG_DEVFS_FS  */
-+#endif				/*  _LINUX_DEVFS_FS_KERNEL_H  */
-diff -urN linux-2.6.19.old/include/linux/fb.h linux-2.6.19.dev/include/linux/fb.h
---- linux-2.6.19.old/include/linux/fb.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/include/linux/fb.h	2006-12-14 03:12:59.000000000 +0100
-@@ -379,6 +379,7 @@
- #include <linux/init.h>
- #include <linux/device.h>
- #include <linux/workqueue.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/notifier.h>
- #include <linux/list.h>
- #include <linux/backlight.h>
-diff -urN linux-2.6.19.old/include/linux/genhd.h linux-2.6.19.dev/include/linux/genhd.h
---- linux-2.6.19.old/include/linux/genhd.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/include/linux/genhd.h	2006-12-14 03:12:59.000000000 +0100
-@@ -114,6 +114,8 @@
- 	sector_t capacity;
- 
- 	int flags;
-+	char devfs_name[64];		/* devfs crap */
-+	int number;			/* more of the same */
- 	struct device *driverfs_dev;
- 	struct kobject kobj;
- 	struct kobject *holder_dir;
-diff -urN linux-2.6.19.old/include/linux/ide.h linux-2.6.19.dev/include/linux/ide.h
---- linux-2.6.19.old/include/linux/ide.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/include/linux/ide.h	2006-12-14 03:12:59.000000000 +0100
-@@ -553,6 +553,7 @@
- 	struct hd_driveid	*id;	/* drive model identification info */
- 	struct proc_dir_entry *proc;	/* /proc/ide/ directory entry */
- 	struct ide_settings_s *settings;/* /proc/ide/ drive settings */
-+	char		devfs_name[64];	/* devfs crap */
- 
- 	struct hwif_s		*hwif;	/* actually (ide_hwif_t *) */
- 
-diff -urN linux-2.6.19.old/include/linux/miscdevice.h linux-2.6.19.dev/include/linux/miscdevice.h
---- linux-2.6.19.old/include/linux/miscdevice.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/include/linux/miscdevice.h	2006-12-14 03:12:59.000000000 +0100
-@@ -40,6 +40,7 @@
- 	struct list_head list;
- 	struct device *dev;
- 	struct class_device *class;
-+	char devfs_name[64];
- };
- 
- extern int misc_register(struct miscdevice * misc);
-diff -urN linux-2.6.19.old/include/linux/serial_core.h linux-2.6.19.dev/include/linux/serial_core.h
---- linux-2.6.19.old/include/linux/serial_core.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/include/linux/serial_core.h	2006-12-14 03:12:59.000000000 +0100
-@@ -339,6 +339,7 @@
- 	struct module		*owner;
- 	const char		*driver_name;
- 	const char		*dev_name;
-+	const char		*devfs_name;
- 	int			 major;
- 	int			 minor;
- 	int			 nr;
-diff -urN linux-2.6.19.old/include/linux/tty_driver.h linux-2.6.19.dev/include/linux/tty_driver.h
---- linux-2.6.19.old/include/linux/tty_driver.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/include/linux/tty_driver.h	2006-12-14 03:12:59.000000000 +0100
-@@ -157,6 +157,7 @@
- 	struct cdev cdev;
- 	struct module	*owner;
- 	const char	*driver_name;
-+	const char	*devfs_name;
- 	const char	*name;
- 	int	name_base;	/* offset of printed name */
- 	int	major;		/* major device number */
-@@ -251,6 +252,8 @@
-  *	called.  This is to be used by drivers that have tty devices
-  *	that can appear and disappear while the main tty driver is
-  *	registered with the tty core.
-+ * TTY_DRIVER_NO_DEVFS --- if set, do not create devfs entries. This
-+ *	is only used by tty_register_driver().
-  *
-  * TTY_DRIVER_DEVPTS_MEM -- don't use the standard arrays, instead
-  *	use dynamic memory keyed through the devpts filesystem.  This
-@@ -260,6 +263,7 @@
- #define TTY_DRIVER_RESET_TERMIOS	0x0002
- #define TTY_DRIVER_REAL_RAW		0x0004
- #define TTY_DRIVER_DYNAMIC_DEV		0x0008
-+#define TTY_DRIVER_NO_DEVFS		0x0008
- #define TTY_DRIVER_DEVPTS_MEM		0x0010
- 
- /* tty driver types */
-diff -urN linux-2.6.19.old/include/media/v4l2-dev.h linux-2.6.19.dev/include/media/v4l2-dev.h
---- linux-2.6.19.old/include/media/v4l2-dev.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/include/media/v4l2-dev.h	2006-12-14 03:12:59.000000000 +0100
-@@ -315,6 +315,7 @@
- 	/* for videodev.c intenal usage -- please don't touch */
- 	int users;                     /* video_exclusive_{open|close} ... */
- 	struct mutex lock;             /* ... helper function uses these   */
-+	char devfs_name[64];           /* devfs */
- 	struct class_device class_dev; /* sysfs */
- };
- 
-diff -urN linux-2.6.19.old/include/scsi/scsi_device.h linux-2.6.19.dev/include/scsi/scsi_device.h
---- linux-2.6.19.old/include/scsi/scsi_device.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/include/scsi/scsi_device.h	2006-12-14 03:12:59.000000000 +0100
-@@ -74,6 +74,7 @@
- 	unsigned sector_size;	/* size in bytes */
- 
- 	void *hostdata;		/* available to low-level driver */
-+	char devfs_name[256];	/* devfs junk */
- 	char type;
- 	char scsi_level;
- 	char inq_periph_qual;	/* PQ from INQUIRY data */	
-diff -urN linux-2.6.19.old/include/sound/core.h linux-2.6.19.dev/include/sound/core.h
---- linux-2.6.19.old/include/sound/core.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/include/sound/core.h	2006-12-14 03:12:59.000000000 +0100
-@@ -188,6 +188,8 @@
- 	const struct file_operations *f_ops;	/* file operations */
- 	void *private_data;		/* private data for f_ops->open */
- 	struct class_device *class_dev;	/* class device for sysfs */
-+	char name[0];			/* device name for devfs (keep
-+					   at the end of structure) */
- };
- 
- /* sound.c */
-diff -urN linux-2.6.19.old/init/do_mounts.c linux-2.6.19.dev/init/do_mounts.c
---- linux-2.6.19.old/init/do_mounts.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/init/do_mounts.c	2006-12-14 03:12:59.000000000 +0100
-@@ -335,7 +335,7 @@
- {
- 	void *data = nfs_root_data();
- 
--	create_dev("/dev/root", ROOT_DEV);
-+	create_dev("/dev/root", ROOT_DEV, root_device_name);
- 	if (data &&
- 	    do_mount_root("/dev/root", "nfs", root_mountflags, data) == 0)
- 		return 1;
-@@ -397,7 +397,7 @@
- 	}
- #endif
- #ifdef CONFIG_BLOCK
--	create_dev("/dev/root", ROOT_DEV);
-+	create_dev("/dev/root", ROOT_DEV, root_device_name);
- 	mount_block_root("/dev/root", root_mountflags);
- #endif
- }
-@@ -409,6 +409,8 @@
- {
- 	int is_floppy;
- 
-+	mount_devfs();
-+
- 	if (root_delay) {
- 		printk(KERN_INFO "Waiting %dsec before mounting root device...\n",
- 		       root_delay);
-@@ -442,8 +444,10 @@
- 
- 	mount_root();
- out:
-+	umount_devfs("/dev");
- 	sys_mount(".", "/", NULL, MS_MOVE, NULL);
- 	sys_chroot(".");
- 	security_sb_post_mountroot();
-+	mount_devfs_fs ();
- }
- 
-diff -urN linux-2.6.19.old/init/do_mounts_devfs.c linux-2.6.19.dev/init/do_mounts_devfs.c
---- linux-2.6.19.old/init/do_mounts_devfs.c	1970-01-01 01:00:00.000000000 +0100
-+++ linux-2.6.19.dev/init/do_mounts_devfs.c	2006-12-14 03:12:59.000000000 +0100
-@@ -0,0 +1,137 @@
-+
-+#include <linux/kernel.h>
-+#include <linux/dirent.h>
-+#include <linux/string.h>
-+
-+#include "do_mounts.h"
-+
-+void __init mount_devfs(void)
-+{
-+	sys_mount("devfs", "/dev", "devfs", 0, NULL);
-+}
-+
-+void __init umount_devfs(char *path)
-+{
-+	sys_umount(path, 0);
-+}
-+
-+/*
-+ * If the dir will fit in *buf, return its length.  If it won't fit, return
-+ * zero.  Return -ve on error.
-+ */
-+static int __init do_read_dir(int fd, void *buf, int len)
-+{
-+	long bytes, n;
-+	char *p = buf;
-+	sys_lseek(fd, 0, 0);
-+
-+	for (bytes = 0; bytes < len; bytes += n) {
-+		n = sys_getdents64(fd, (struct linux_dirent64 *)(p + bytes),
-+					len - bytes);
-+		if (n < 0)
-+			return n;
-+		if (n == 0)
-+			return bytes;
-+	}
-+	return 0;
-+}
-+
-+/*
-+ * Try to read all of a directory.  Returns the contents at *p, which
-+ * is kmalloced memory.  Returns the number of bytes read at *len.  Returns
-+ * NULL on error.
-+ */
-+static void * __init read_dir(char *path, int *len)
-+{
-+	int size;
-+	int fd = sys_open(path, 0, 0);
-+
-+	*len = 0;
-+	if (fd < 0)
-+		return NULL;
-+
-+	for (size = 1 << 9; size <= (PAGE_SIZE << MAX_ORDER); size <<= 1) {
-+		void *p = kmalloc(size, GFP_KERNEL);
-+		int n;
-+		if (!p)
-+			break;
-+		n = do_read_dir(fd, p, size);
-+		if (n > 0) {
-+			sys_close(fd);
-+			*len = n;
-+			return p;
-+		}
-+		kfree(p);
-+		if (n == -EINVAL)
-+			continue;	/* Try a larger buffer */
-+		if (n < 0)
-+			break;
-+	}
-+	sys_close(fd);
-+	return NULL;
-+}
-+
-+/*
-+ * recursively scan <path>, looking for a device node of type <dev>
-+ */
-+static int __init find_in_devfs(char *path, unsigned dev)
-+{
-+	char *end = path + strlen(path);
-+	int rest = path + 64 - end;
-+	int size;
-+	char *p = read_dir(path, &size);
-+	char *s;
-+
-+	if (!p)
-+		return -1;
-+	for (s = p; s < p + size; s += ((struct linux_dirent64 *)s)->d_reclen) {
-+		struct linux_dirent64 *d = (struct linux_dirent64 *)s;
-+		if (strlen(d->d_name) + 2 > rest)
-+			continue;
-+		switch (d->d_type) {
-+			case DT_BLK:
-+				sprintf(end, "/%s", d->d_name);
-+				if (bstat(path) != dev)
-+					break;
-+				kfree(p);
-+				return 0;
-+			case DT_DIR:
-+				if (strcmp(d->d_name, ".") == 0)
-+					break;
-+				if (strcmp(d->d_name, "..") == 0)
-+					break;
-+				sprintf(end, "/%s", d->d_name);
-+				if (find_in_devfs(path, dev) < 0)
-+					break;
-+				kfree(p);
-+				return 0;
-+		}
-+	}
-+	kfree(p);
-+	return -1;
-+}
-+
-+/*
-+ * create a device node called <name> which points to
-+ * <devfs_name> if possible, otherwise find a device node
-+ * which matches <dev> and make <name> a symlink pointing to it.
-+ */
-+int __init create_dev(char *name, dev_t dev, char *devfs_name)
-+{
-+	char path[64];
-+
-+	sys_unlink(name);
-+	if (devfs_name && devfs_name[0]) {
-+		if (strncmp(devfs_name, "/dev/", 5) == 0)
-+			devfs_name += 5;
-+		sprintf(path, "/dev/%s", devfs_name);
-+		if (sys_access(path, 0) == 0)
-+			return sys_symlink(devfs_name, name);
-+	}
-+	if (!dev)
-+		return -1;
-+	strcpy(path, "/dev");
-+	if (find_in_devfs(path, new_encode_dev(dev)) < 0)
-+		return -1;
-+	return sys_symlink(path + 5, name);
-+}
-diff -urN linux-2.6.19.old/init/do_mounts.h linux-2.6.19.dev/init/do_mounts.h
---- linux-2.6.19.old/init/do_mounts.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/init/do_mounts.h	2006-12-14 03:12:59.000000000 +0100
-@@ -6,6 +6,7 @@
- #include <linux/mount.h>
- #include <linux/major.h>
- #include <linux/root_dev.h>
-+#include <linux/devfs_fs_kernel.h>
- 
- void  change_floppy(char *fmt, ...);
- void  mount_block_root(char *name, int flags);
-@@ -13,12 +14,25 @@
- extern int root_mountflags;
- extern char *root_device_name;
- 
--static inline int create_dev(char *name, dev_t dev)
-+#ifdef CONFIG_DEVFS_FS
-+
-+void mount_devfs(void);
-+void umount_devfs(char *path);
-+int  create_dev(char *name, dev_t dev, char *devfs_name);
-+
-+#else
-+
-+static inline void mount_devfs(void) {}
-+static inline void umount_devfs(const char *path) {}
-+
-+static inline int create_dev(char *name, dev_t dev, char *devfs_name)
- {
- 	sys_unlink(name);
- 	return sys_mknod(name, S_IFBLK|0600, new_encode_dev(dev));
- }
- 
-+#endif
-+
- #if BITS_PER_LONG == 32
- static inline u32 bstat(char *name)
- {
-diff -urN linux-2.6.19.old/init/do_mounts_initrd.c linux-2.6.19.dev/init/do_mounts_initrd.c
---- linux-2.6.19.old/init/do_mounts_initrd.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/init/do_mounts_initrd.c	2006-12-14 03:12:59.000000000 +0100
-@@ -43,7 +43,7 @@
- 	int pid;
- 
- 	real_root_dev = new_encode_dev(ROOT_DEV);
--	create_dev("/dev/root.old", Root_RAM0);
-+	create_dev("/dev/root.old", Root_RAM0, NULL);
- 	/* mount initrd on rootfs' /root */
- 	mount_block_root("/dev/root.old", root_mountflags & ~MS_RDONLY);
- 	sys_mkdir("/old", 0700);
-@@ -53,6 +53,7 @@
- 	sys_chdir("/root");
- 	sys_mount(".", "/", NULL, MS_MOVE, NULL);
- 	sys_chroot(".");
-+	mount_devfs_fs ();
- 
- 	current->flags |= PF_NOFREEZE;
- 	pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
-@@ -69,6 +70,7 @@
- 	sys_chroot(".");
- 	sys_close(old_fd);
- 	sys_close(root_fd);
-+	umount_devfs("/old/dev");
- 
- 	if (new_decode_dev(real_root_dev) == Root_RAM0) {
- 		sys_chdir("/old");
-@@ -104,7 +106,7 @@
- int __init initrd_load(void)
- {
- 	if (mount_initrd) {
--		create_dev("/dev/ram", Root_RAM0);
-+		create_dev("/dev/ram", Root_RAM0, NULL);
- 		/*
- 		 * Load the initrd data into /dev/ram0. Execute it as initrd
- 		 * unless /dev/ram0 is supposed to be our actual root device,
-diff -urN linux-2.6.19.old/init/do_mounts_md.c linux-2.6.19.dev/init/do_mounts_md.c
---- linux-2.6.19.old/init/do_mounts_md.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/init/do_mounts_md.c	2006-12-14 03:12:59.000000000 +0100
-@@ -121,18 +121,19 @@
- 		int err = 0;
- 		char *devname;
- 		mdu_disk_info_t dinfo;
--		char name[16];
-+		char name[16], devfs_name[16];
- 
- 		minor = md_setup_args[ent].minor;
- 		partitioned = md_setup_args[ent].partitioned;
- 		devname = md_setup_args[ent].device_names;
- 
- 		sprintf(name, "/dev/md%s%d", partitioned?"_d":"", minor);
-+		sprintf(devfs_name, "/dev/md/%s%d", partitioned?"d":"", minor);
- 		if (partitioned)
- 			dev = MKDEV(mdp_major, minor << MdpMinorShift);
- 		else
- 			dev = MKDEV(MD_MAJOR, minor);
--		create_dev(name, dev);
-+		create_dev(name, dev, devfs_name);
- 		for (i = 0; i < MD_SB_DISKS && devname != 0; i++) {
- 			char *p;
- 			char comp_name[64];
-@@ -267,7 +268,7 @@
- 
- void __init md_run_setup(void)
- {
--	create_dev("/dev/md0", MKDEV(MD_MAJOR, 0));
-+	create_dev("/dev/md0", MKDEV(MD_MAJOR, 0), "md/0");
- 	if (raid_noautodetect)
- 		printk(KERN_INFO "md: Skipping autodetection of RAID arrays. (raid=noautodetect)\n");
- 	else {
-diff -urN linux-2.6.19.old/init/main.c linux-2.6.19.dev/init/main.c
---- linux-2.6.19.old/init/main.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/init/main.c	2006-12-14 03:12:59.000000000 +0100
-@@ -12,6 +12,7 @@
- #include <linux/types.h>
- #include <linux/module.h>
- #include <linux/proc_fs.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/kernel.h>
- #include <linux/syscalls.h>
- #include <linux/string.h>
-diff -urN linux-2.6.19.old/init/Makefile linux-2.6.19.dev/init/Makefile
---- linux-2.6.19.old/init/Makefile	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/init/Makefile	2006-12-14 03:12:59.000000000 +0100
-@@ -6,6 +6,7 @@
- obj-$(CONFIG_GENERIC_CALIBRATE_DELAY) += calibrate.o
- 
- mounts-y			:= do_mounts.o
-+mounts-$(CONFIG_DEVFS_FS)	+= do_mounts_devfs.o
- mounts-$(CONFIG_BLK_DEV_RAM)	+= do_mounts_rd.o
- mounts-$(CONFIG_BLK_DEV_INITRD)	+= do_mounts_initrd.o
- mounts-$(CONFIG_BLK_DEV_MD)	+= do_mounts_md.o
-diff -urN linux-2.6.19.old/mm/shmem.c linux-2.6.19.dev/mm/shmem.c
---- linux-2.6.19.old/mm/shmem.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/mm/shmem.c	2006-12-14 03:12:59.000000000 +0100
-@@ -25,6 +25,7 @@
- 
- #include <linux/module.h>
- #include <linux/init.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/fs.h>
- #include <linux/xattr.h>
- #include <linux/generic_acl.h>
-@@ -2427,6 +2428,9 @@
- 		goto out2;
- 	}
- 
-+#ifdef CONFIG_TMPFS
-+	devfs_mk_dir("shm");
-+#endif
- 	shm_mnt = vfs_kern_mount(&tmpfs_fs_type, MS_NOUSER,
- 				tmpfs_fs_type.name, NULL);
- 	if (IS_ERR(shm_mnt)) {
-diff -urN linux-2.6.19.old/mm/tiny-shmem.c linux-2.6.19.dev/mm/tiny-shmem.c
---- linux-2.6.19.old/mm/tiny-shmem.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/mm/tiny-shmem.c	2006-12-14 03:12:59.000000000 +0100
-@@ -12,6 +12,7 @@
- 
- #include <linux/fs.h>
- #include <linux/init.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/vfs.h>
- #include <linux/mount.h>
- #include <linux/file.h>
-@@ -32,6 +33,9 @@
- {
- 	BUG_ON(register_filesystem(&tmpfs_fs_type) != 0);
- 
-+#ifdef CONFIG_TMPFS
-+	devfs_mk_dir("shm");
-+#endif
- 	shm_mnt = kern_mount(&tmpfs_fs_type);
- 	BUG_ON(IS_ERR(shm_mnt));
- 
-diff -urN linux-2.6.19.old/net/bluetooth/rfcomm/tty.c linux-2.6.19.dev/net/bluetooth/rfcomm/tty.c
---- linux-2.6.19.old/net/bluetooth/rfcomm/tty.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/net/bluetooth/rfcomm/tty.c	2006-12-14 03:12:59.000000000 +0100
-@@ -1039,12 +1039,13 @@
- 
- 	rfcomm_tty_driver->owner	= THIS_MODULE;
- 	rfcomm_tty_driver->driver_name	= "rfcomm";
-+	rfcomm_tty_driver->devfs_name	= "bluetooth/rfcomm/";
- 	rfcomm_tty_driver->name		= "rfcomm";
- 	rfcomm_tty_driver->major	= RFCOMM_TTY_MAJOR;
- 	rfcomm_tty_driver->minor_start	= RFCOMM_TTY_MINOR;
- 	rfcomm_tty_driver->type		= TTY_DRIVER_TYPE_SERIAL;
- 	rfcomm_tty_driver->subtype	= SERIAL_TYPE_NORMAL;
--	rfcomm_tty_driver->flags	= TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
-+	rfcomm_tty_driver->flags	= TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
- 	rfcomm_tty_driver->init_termios	= tty_std_termios;
- 	rfcomm_tty_driver->init_termios.c_cflag	= B9600 | CS8 | CREAD | HUPCL | CLOCAL;
- 	tty_set_operations(rfcomm_tty_driver, &rfcomm_ops);
-diff -urN linux-2.6.19.old/net/irda/ircomm/ircomm_tty.c linux-2.6.19.dev/net/irda/ircomm/ircomm_tty.c
---- linux-2.6.19.old/net/irda/ircomm/ircomm_tty.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/net/irda/ircomm/ircomm_tty.c	2006-12-14 03:12:59.000000000 +0100
-@@ -123,6 +123,7 @@
- 	driver->owner		= THIS_MODULE;
- 	driver->driver_name     = "ircomm";
- 	driver->name            = "ircomm";
-+	driver->devfs_name      = "ircomm";
- 	driver->major           = IRCOMM_TTY_MAJOR;
- 	driver->minor_start     = IRCOMM_TTY_MINOR;
- 	driver->type            = TTY_DRIVER_TYPE_SERIAL;
-diff -urN linux-2.6.19.old/net/irda/irnet/irnet.h linux-2.6.19.dev/net/irda/irnet/irnet.h
---- linux-2.6.19.old/net/irda/irnet/irnet.h	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/net/irda/irnet/irnet.h	2006-12-14 03:12:59.000000000 +0100
-@@ -244,6 +244,7 @@
- #include <linux/skbuff.h>
- #include <linux/tty.h>
- #include <linux/proc_fs.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/netdevice.h>
- #include <linux/miscdevice.h>
- #include <linux/poll.h>
-diff -urN linux-2.6.19.old/sound/core/info.c linux-2.6.19.dev/sound/core/info.c
---- linux-2.6.19.old/sound/core/info.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/sound/core/info.c	2006-12-14 03:12:59.000000000 +0100
-@@ -29,6 +29,7 @@
- #include <sound/info.h>
- #include <sound/version.h>
- #include <linux/proc_fs.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/mutex.h>
- #include <stdarg.h>
- 
-diff -urN linux-2.6.19.old/sound/core/sound.c linux-2.6.19.dev/sound/core/sound.c
---- linux-2.6.19.old/sound/core/sound.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/sound/core/sound.c	2006-12-14 03:12:59.000000000 +0100
-@@ -32,6 +32,7 @@
- #include <sound/control.h>
- #include <sound/initval.h>
- #include <linux/kmod.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/mutex.h>
- 
- #define SNDRV_OS_MINORS 256
-@@ -41,6 +42,7 @@
- EXPORT_SYMBOL(snd_major);
- 
- static int cards_limit = 1;
-+static int device_mode = S_IFCHR | S_IRUGO | S_IWUGO;
- 
- MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
- MODULE_DESCRIPTION("Advanced Linux Sound Architecture driver for soundcards.");
-@@ -49,6 +51,10 @@
- MODULE_PARM_DESC(major, "Major # for sound driver.");
- module_param(cards_limit, int, 0444);
- MODULE_PARM_DESC(cards_limit, "Count of auto-loadable soundcards.");
-+#ifdef CONFIG_DEVFS_FS
-+module_param(device_mode, int, 0444);
-+MODULE_PARM_DESC(device_mode, "Device file permission mask for devfs.");
-+#endif
- MODULE_ALIAS_CHARDEV_MAJOR(CONFIG_SND_MAJOR);
- 
- /* this one holds the actual max. card number currently available.
-@@ -244,7 +250,7 @@
- 	struct device *device = NULL;
- 
- 	snd_assert(name, return -EINVAL);
--	preg = kmalloc(sizeof *preg, GFP_KERNEL);
-+	preg = kmalloc((sizeof *preg) + strlen(name) + 1, GFP_KERNEL);
- 	if (preg == NULL)
- 		return -ENOMEM;
- 	preg->type = type;
-@@ -252,6 +258,7 @@
- 	preg->device = dev;
- 	preg->f_ops = f_ops;
- 	preg->private_data = private_data;
-+	strcpy(preg->name, name); /* for devfs */
- 	mutex_lock(&sound_mutex);
- #ifdef CONFIG_SND_DYNAMIC_MINORS
- 	minor = snd_find_free_minor();
-@@ -266,6 +273,8 @@
- 		return minor;
- 	}
- 	snd_minors[minor] = preg;
-+	if (type != SNDRV_DEVICE_TYPE_CONTROL || preg->card >= cards_limit)
-+		devfs_mk_cdev(MKDEV(major, minor), S_IFCHR | device_mode, "snd/%s", name);
- 	if (card)
- 		device = card->dev;
- 	preg->class_dev = class_device_create(sound_class, NULL,
-@@ -320,6 +329,9 @@
- 		return -EINVAL;
- 	}
- 
-+	if (snd_minors[minor]->type != SNDRV_DEVICE_TYPE_CONTROL ||
-+	    snd_minors[minor]->card >= cards_limit)	/* created in sound.c */
-+		devfs_remove("snd/%s", snd_minors[minor]->name);
- 	class_device_destroy(sound_class, MKDEV(major, minor));
- 
- 	kfree(snd_minors[minor]);
-@@ -430,17 +442,24 @@
- 
- static int __init alsa_sound_init(void)
- {
-+	short controlnum;
-+
- 	snd_major = major;
- 	snd_ecards_limit = cards_limit;
-+	devfs_mk_dir("snd");
- 	if (register_chrdev(major, "alsa", &snd_fops)) {
- 		snd_printk(KERN_ERR "unable to register native major device number %d\n", major);
-+		devfs_remove("snd");
- 		return -EIO;
- 	}
- 	if (snd_info_init() < 0) {
- 		unregister_chrdev(major, "alsa");
-+		devfs_remove("snd");
- 		return -ENOMEM;
- 	}
- 	snd_info_minor_register();
-+	for (controlnum = 0; controlnum < cards_limit; controlnum++)
-+		devfs_mk_cdev(MKDEV(major, controlnum<<5), S_IFCHR | device_mode, "snd/controlC%d", controlnum);
- #ifndef MODULE
- 	printk(KERN_INFO "Advanced Linux Sound Architecture Driver Version " CONFIG_SND_VERSION CONFIG_SND_DATE ".\n");
- #endif
-@@ -449,10 +468,16 @@
- 
- static void __exit alsa_sound_exit(void)
- {
-+	short controlnum;
-+
-+	for (controlnum = 0; controlnum < cards_limit; controlnum++)
-+		devfs_remove("snd/controlC%d", controlnum);
-+
- 	snd_info_minor_unregister();
- 	snd_info_done();
- 	if (unregister_chrdev(major, "alsa") != 0)
- 		snd_printk(KERN_ERR "unable to unregister major device number %d\n", major);
-+	devfs_remove("snd");
- }
- 
- module_init(alsa_sound_init)
-diff -urN linux-2.6.19.old/sound/oss/soundcard.c linux-2.6.19.dev/sound/oss/soundcard.c
---- linux-2.6.19.old/sound/oss/soundcard.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/sound/oss/soundcard.c	2006-12-14 03:12:59.000000000 +0100
-@@ -37,6 +37,7 @@
- #include <linux/wait.h>
- #include <linux/slab.h>
- #include <linux/ioport.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/major.h>
- #include <linux/delay.h>
- #include <linux/proc_fs.h>
-@@ -557,6 +558,9 @@
- 	sound_dmap_flag = (dmabuf > 0 ? 1 : 0);
- 
- 	for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) {
-+		devfs_mk_cdev(MKDEV(SOUND_MAJOR, dev_list[i].minor),
-+				S_IFCHR | dev_list[i].mode,
-+				"sound/%s", dev_list[i].name);
- 		class_device_create(sound_class, NULL,
- 				    MKDEV(SOUND_MAJOR, dev_list[i].minor),
- 				    NULL, "%s", dev_list[i].name);
-@@ -564,10 +568,15 @@
- 		if (!dev_list[i].num)
- 			continue;
- 
--		for (j = 1; j < *dev_list[i].num; j++)
-+		for (j = 1; j < *dev_list[i].num; j++) {
-+			devfs_mk_cdev(MKDEV(SOUND_MAJOR,
-+						dev_list[i].minor + (j*0x10)),
-+					S_IFCHR | dev_list[i].mode,
-+					"sound/%s%d", dev_list[i].name, j);
- 			class_device_create(sound_class, NULL,
- 					    MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)),
- 					    NULL, "%s%d", dev_list[i].name, j);
-+		}
- 	}
- 
- 	if (sound_nblocks >= 1024)
-@@ -581,11 +590,14 @@
- 	int i, j;
- 
- 	for (i = 0; i < sizeof (dev_list) / sizeof *dev_list; i++) {
-+		devfs_remove("sound/%s", dev_list[i].name);
- 		class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor));
- 		if (!dev_list[i].num)
- 			continue;
--		for (j = 1; j < *dev_list[i].num; j++)
-+		for (j = 1; j < *dev_list[i].num; j++) {
-+			devfs_remove("sound/%s%d", dev_list[i].name, j);
- 			class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, dev_list[i].minor + (j*0x10)));
-+		}
- 	}
- 	
- 	unregister_sound_special(1);
-diff -urN linux-2.6.19.old/sound/sound_core.c linux-2.6.19.dev/sound/sound_core.c
---- linux-2.6.19.old/sound/sound_core.c	2006-11-29 22:57:37.000000000 +0100
-+++ linux-2.6.19.dev/sound/sound_core.c	2006-12-14 03:12:59.000000000 +0100
-@@ -43,6 +43,7 @@
- #include <linux/sound.h>
- #include <linux/major.h>
- #include <linux/kmod.h>
-+#include <linux/devfs_fs_kernel.h>
- #include <linux/device.h>
- 
- #define SOUND_STEP 16
-@@ -170,6 +171,8 @@
- 	else
- 		sprintf(s->name, "sound/%s%d", name, r / SOUND_STEP);
- 
-+	devfs_mk_cdev(MKDEV(SOUND_MAJOR, s->unit_minor),
-+			S_IFCHR | mode, s->name);
- 	class_device_create(sound_class, NULL, MKDEV(SOUND_MAJOR, s->unit_minor),
- 			    dev, s->name+6);
- 	return r;
-@@ -193,6 +196,7 @@
- 	p = __sound_remove_unit(list, unit);
- 	spin_unlock(&sound_loader_lock);
- 	if (p) {
-+		devfs_remove(p->name);
- 		class_device_destroy(sound_class, MKDEV(SOUND_MAJOR, p->unit_minor));
- 		kfree(p);
- 	}
-@@ -527,6 +531,7 @@
- 	/* We have nothing to really do here - we know the lists must be
- 	   empty */
- 	unregister_chrdev(SOUND_MAJOR, "sound");
-+	devfs_remove("sound");
- 	class_destroy(sound_class);
- }
- 
-@@ -536,6 +541,7 @@
- 		printk(KERN_ERR "soundcore: sound device already in use.\n");
- 		return -EBUSY;
- 	}
-+	devfs_mk_dir ("sound");
- 	sound_class = class_create(THIS_MODULE, "sound");
- 	if (IS_ERR(sound_class))
- 		return PTR_ERR(sound_class);
diff --git a/target/linux/generic-2.6/patches/008-mtd_uaccess.patch b/target/linux/generic-2.6/patches/008-mtd_uaccess.patch
deleted file mode 100644
index 0736703..0000000
--- a/target/linux/generic-2.6/patches/008-mtd_uaccess.patch
+++ /dev/null
@@ -1,15 +0,0 @@
---- linux-2.6.19.2/drivers/mtd/mtdchar.c.old	2007-01-27 20:17:35.000000000 +0100
-+++ linux-2.6.19.2/drivers/mtd/mtdchar.c	2007-01-27 20:18:12.000000000 +0100
-@@ -33,10 +33,10 @@
- 
- #ifdef CONFIG_DEVFS_FS
- 	devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2),
--			S_IFCHR | S_IRUGO | S_IWUGO, "mtd/%d", mtd->index);
-+			S_IFCHR | S_IRUSR | S_IWUSR, "mtd/%d", mtd->index);
- 
- 	devfs_mk_cdev(MKDEV(MTD_CHAR_MAJOR, mtd->index*2+1),
--			S_IFCHR | S_IRUGO, "mtd/%dro", mtd->index);
-+			S_IFCHR | S_IRUSR, "mtd/%dro", mtd->index);
- #else
- 	class_device_create(mtd_class, NULL, MKDEV(MTD_CHAR_MAJOR, mtd->index*2),
- 			    NULL, "mtd%d", mtd->index);