rename target/linux/generic-2.6 to generic

SVN-Revision: 21952

1 files changed, 309 insertions, 0 deletions

diff --git a/target/linux/generic/patches-2.6.31/050-lzo_compressed_kernels.patch b/target/linux/generic/patches-2.6.31/050-lzo_compressed_kernels.patch
new file mode 100644
index 0000000..733d175
--- /dev/null
+++ b/target/linux/generic/patches-2.6.31/050-lzo_compressed_kernels.patch
@@ -0,0 +1,309 @@
+--- /dev/null
++++ b/include/linux/decompress/unlzo.h
+@@ -0,0 +1,10 @@
++#ifndef DECOMPRESS_UNLZO_H
++#define DECOMPRESS_UNLZO_H
++
++int unlzo(unsigned char *inbuf, int len,
++	int(*fill)(void*, unsigned int),
++	int(*flush)(void*, unsigned int),
++	unsigned char *output,
++	int *pos,
++	void(*error)(char *x));
++#endif
+--- a/init/Kconfig
++++ b/init/Kconfig
+@@ -115,10 +115,13 @@ config HAVE_KERNEL_BZIP2
+ config HAVE_KERNEL_LZMA
+ 	bool
+ 
++config HAVE_KERNEL_LZO
++	bool
++
+ choice
+ 	prompt "Kernel compression mode"
+ 	default KERNEL_GZIP
+-	depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA
++	depends on HAVE_KERNEL_GZIP || HAVE_KERNEL_BZIP2 || HAVE_KERNEL_LZMA || HAVE_KERNEL_LZO
+ 	help
+ 	  The linux kernel is a kind of self-extracting executable.
+ 	  Several compression algorithms are available, which differ
+@@ -141,9 +144,8 @@ config KERNEL_GZIP
+ 	bool "Gzip"
+ 	depends on HAVE_KERNEL_GZIP
+ 	help
+-	  The old and tried gzip compression. Its compression ratio is
+-	  the poorest among the 3 choices; however its speed (both
+-	  compression and decompression) is the fastest.
++	  The old and tried gzip compression. It provides a good balance
++	  between compression ratio and decompression speed.
+ 
+ config KERNEL_BZIP2
+ 	bool "Bzip2"
+@@ -164,6 +166,14 @@ config KERNEL_LZMA
+ 	  two. Compression is slowest.	The kernel size is about 33%
+ 	  smaller with LZMA in comparison to gzip.
+ 
++config KERNEL_LZO
++	bool "LZO"
++	depends on HAVE_KERNEL_LZO
++	help
++	  Its compression ratio is the poorest among the 4. The kernel
++	  size is about about 10% bigger than gzip; however its speed
++	  (both compression and decompression) is the fastest.
++
+ endchoice
+ 
+ config SWAP
+--- /dev/null
++++ b/lib/decompress_unlzo.c
+@@ -0,0 +1,208 @@
++/*
++ * LZO decompressor for the Linux kernel. Code borrowed from the lzo
++ * implementation by Markus Franz Xaver Johannes Oberhumer.
++ *
++ * Linux kernel adaptation:
++ * Copyright (C) 2009
++ * Albin Tonnerre, Free Electrons <albin.tonnerre@free-electrons.com>
++ *
++ * Original code:
++ * Copyright (C) 1996-2005 Markus Franz Xaver Johannes Oberhumer
++ * All Rights Reserved.
++ *
++ * lzop and the LZO library are free software; you can redistribute them
++ * and/or modify them under the terms of the GNU General Public License as
++ * published by the Free Software Foundation; either version 2 of
++ * the License, or (at your option) any later version.
++ *
++ * This program 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 General Public License for more details.
++ *
++ * You should have received a copy of the GNU General Public License
++ * along with this program; see the file COPYING.
++ * If not, write to the Free Software Foundation, Inc.,
++ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
++ *
++ * Markus F.X.J. Oberhumer
++ * <markus@oberhumer.com>
++ * http://www.oberhumer.com/opensource/lzop/
++ */
++
++#ifdef STATIC
++#include "lzo/lzo1x_decompress.c"
++#else
++#include <linux/slab.h>
++#include <linux/decompress/unlzo.h>
++#endif
++
++#include <linux/types.h>
++#include <linux/lzo.h>
++#include <linux/decompress/mm.h>
++
++#include <linux/compiler.h>
++#include <asm/unaligned.h>
++
++static const unsigned char lzop_magic[] =
++	{ 0x89, 0x4c, 0x5a, 0x4f, 0x00, 0x0d, 0x0a, 0x1a, 0x0a };
++
++#define LZO_BLOCK_SIZE        (256*1024l)
++#define HEADER_HAS_FILTER      0x00000800L
++
++STATIC inline int INIT parse_header(u8 *input, u8 *skip)
++{
++	int l;
++	u8 *parse = input;
++	u8 level = 0;
++	u16 version;
++
++	/* read magic: 9 first bits */
++	for (l = 0; l < 9; l++) {
++		if (*parse++ != lzop_magic[l])
++			return 0;
++	}
++	/* get version (2bytes), skip library version (2),
++	 * 'need to be extracted' version (2) and
++	 * method (1) */
++	version = get_unaligned_be16(parse);
++	parse += 7;
++	if (version >= 0x0940)
++		level = *parse++;
++	if (get_unaligned_be32(parse) & HEADER_HAS_FILTER)
++		parse += 8; /* flags + filter info */
++	else
++		parse += 4; /* flags */
++
++	/* skip mode and mtime_low */
++	parse += 8;
++	if (version >= 0x0940)
++		parse += 4;	/* skip mtime_high */
++
++	l = *parse++;
++	/* don't care about the file name, and skip checksum */
++	parse += l + 4;
++
++	*skip = parse - input;
++	return 1;
++}
++
++STATIC inline int INIT unlzo(u8 *input, int in_len,
++				int (*fill) (void *, unsigned int),
++				int (*flush) (void *, unsigned int),
++				u8 *output, int *posp,
++				void (*error_fn) (char *x))
++{
++	u8 skip = 0, r = 0;
++	u32 src_len, dst_len;
++	size_t tmp;
++	u8 *in_buf, *in_buf_save, *out_buf;
++	int obytes_processed = 0;
++
++	set_error_fn(error_fn);
++
++	if (output)
++		out_buf = output;
++	else if (!flush) {
++		error("NULL output pointer and no flush function provided");
++		goto exit;
++	} else {
++		out_buf = malloc(LZO_BLOCK_SIZE);
++		if (!out_buf) {
++			error("Could not allocate output buffer");
++			goto exit;
++		}
++	}
++
++	if (input && fill) {
++		error("Both input pointer and fill function provided, don't know what to do");
++		goto exit_1;
++	} else if (input)
++		in_buf = input;
++	else if (!fill || !posp) {
++		error("NULL input pointer and missing position pointer or fill function");
++		goto exit_1;
++	} else {
++		in_buf = malloc(lzo1x_worst_compress(LZO_BLOCK_SIZE));
++		if (!in_buf) {
++			error("Could not allocate input buffer");
++			goto exit_1;
++		}
++	}
++	in_buf_save = in_buf;
++
++	if (posp)
++		*posp = 0;
++
++	if (fill)
++		fill(in_buf, lzo1x_worst_compress(LZO_BLOCK_SIZE));
++
++	if (!parse_header(input, &skip)) {
++		error("invalid header");
++		goto exit_2;
++	}
++	in_buf += skip;
++
++	if (posp)
++		*posp = skip;
++
++	for (;;) {
++		/* read uncompressed block size */
++		dst_len = get_unaligned_be32(in_buf);
++		in_buf += 4;
++
++		/* exit if last block */
++		if (dst_len == 0) {
++			if (posp)
++				*posp += 4;
++			break;
++		}
++
++		if (dst_len > LZO_BLOCK_SIZE) {
++			error("dest len longer than block size");
++			goto exit_2;
++		}
++
++		/* read compressed block size, and skip block checksum info */
++		src_len = get_unaligned_be32(in_buf);
++		in_buf += 8;
++
++		if (src_len <= 0 || src_len > dst_len) {
++			error("file corrupted");
++			goto exit_2;
++		}
++
++		/* decompress */
++		tmp = dst_len;
++		r = lzo1x_decompress_safe((u8 *) in_buf, src_len, out_buf, &tmp);
++
++		if (r != LZO_E_OK || dst_len != tmp) {
++			error("Compressed data violation");
++			goto exit_2;
++		}
++
++		obytes_processed += dst_len;
++		if (flush)
++			flush(out_buf, dst_len);
++		if (output)
++			out_buf += dst_len;
++		if (posp)
++			*posp += src_len + 12;
++		if (fill) {
++			in_buf = in_buf_save;
++			fill(in_buf, lzo1x_worst_compress(LZO_BLOCK_SIZE));
++		} else
++			in_buf += src_len;
++	}
++
++exit_2:
++	if (!input)
++		free(in_buf);
++exit_1:
++	if (!output)
++		free(out_buf);
++exit:
++	return obytes_processed;
++}
++
++#define decompress unlzo
+--- a/lib/lzo/lzo1x_decompress.c
++++ b/lib/lzo/lzo1x_decompress.c
+@@ -11,11 +11,13 @@
+  *  Richard Purdie <rpurdie@openedhand.com>
+  */
+ 
++#ifndef STATIC
+ #include <linux/module.h>
+ #include <linux/kernel.h>
+-#include <linux/lzo.h>
+-#include <asm/byteorder.h>
++#endif
++
+ #include <asm/unaligned.h>
++#include <linux/lzo.h>
+ #include "lzodefs.h"
+ 
+ #define HAVE_IP(x, ip_end, ip) ((size_t)(ip_end - ip) < (x))
+@@ -244,9 +246,10 @@ lookbehind_overrun:
+ 	*out_len = op - out;
+ 	return LZO_E_LOOKBEHIND_OVERRUN;
+ }
+-
++#ifndef STATIC
+ EXPORT_SYMBOL_GPL(lzo1x_decompress_safe);
+ 
+ MODULE_LICENSE("GPL");
+ MODULE_DESCRIPTION("LZO1X Decompressor");
+ 
++#endif
+--- a/scripts/Makefile.lib
++++ b/scripts/Makefile.lib
+@@ -230,3 +230,8 @@ quiet_cmd_lzma = LZMA    $@
+ cmd_lzma = (cat $(filter-out FORCE,$^) | \
+ 	lzma -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
+ 	(rm -f $@ ; false)
++
++quiet_cmd_lzo = LZO    $@
++cmd_lzo = (cat $(filter-out FORCE,$^) | \
++	lzop -9 && $(call size_append, $(filter-out FORCE,$^))) > $@ || \
++	(rm -f $@ ; false)