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| author | Imre Kaloz <kaloz@openwrt.org> | 2015-03-31 19:18:03 +0000 |
|---|---|---|
| committer | Imre Kaloz <kaloz@openwrt.org> | 2015-03-31 19:18:03 +0000 |
| commit | 17fb965d6baadc0ac6d39e7cb89954722f2ea7d2 (patch) | |
| tree | a51dafb6a89083aa4b33575906e926f3a5caa7ea /target/linux/generic/patches-3.18/995-mangle_bootargs.patch | |
| parent | b9c4dadc11e5ddd956d683b9fc97db69598c7c68 (diff) | |
| download | mtk-20170518-17fb965d6baadc0ac6d39e7cb89954722f2ea7d2.zip mtk-20170518-17fb965d6baadc0ac6d39e7cb89954722f2ea7d2.tar.gz mtk-20170518-17fb965d6baadc0ac6d39e7cb89954722f2ea7d2.tar.bz2 | |
generic: add CONFIG_MANGLE_BOOTARGS and disable it by default
Enabling this option renames the bootloader supplied root=
and rootfstype= variables, which might have to be know but
would break the automatisms OpenWrt uses.
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
SVN-Revision: 45196
Diffstat (limited to 'target/linux/generic/patches-3.18/995-mangle_bootargs.patch')
| -rw-r--r-- | target/linux/generic/patches-3.18/995-mangle_bootargs.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.18/995-mangle_bootargs.patch b/target/linux/generic/patches-3.18/995-mangle_bootargs.patch new file mode 100644 index 0000000..5d56cf4 --- /dev/null +++ b/target/linux/generic/patches-3.18/995-mangle_bootargs.patch @@ -0,0 +1,55 @@ +--- a/init/main.c ++++ b/init/main.c +@@ -379,6 +379,26 @@ static void __init setup_command_line(ch + strcpy(static_command_line, command_line); + } + ++#ifdef CONFIG_MANGLE_BOOTARGS ++static void __init mangle_bootargs(char *command_line) ++{ ++ char *rootdev; ++ char *rootfs; ++ ++ rootdev = strstr(command_line, "root=/dev/mtdblock"); ++ strncpy(rootdev, "mangled_rootblock=", 18); ++ ++ rootfs = strstr(command_line, "rootfstype"); ++ strncpy(rootfs, "mangled_fs", 10); ++ ++} ++#else ++static void __init mangle_bootargs(char *command_line) ++{ ++} ++#endif ++ ++ + /* + * We need to finalize in a non-__init function or else race conditions + * between the root thread and the init thread may cause start_kernel to +@@ -530,6 +550,7 @@ asmlinkage __visible void __init start_k + pr_notice("%s", linux_banner); + setup_arch(&command_line); + mm_init_cpumask(&init_mm); ++ mangle_bootargs(command_line); + setup_command_line(command_line); + setup_nr_cpu_ids(); + setup_per_cpu_areas(); +--- a/init/Kconfig ++++ b/init/Kconfig +@@ -1597,6 +1597,15 @@ config EMBEDDED + an embedded system so certain expert options are available + for configuration. + ++config MANGLE_BOOTARGS ++ bool "Rename offending bootargs" ++ depends on EXPERT ++ help ++ Sometimes the bootloader passed bogus root= and rootfstype= ++ parameters to the kernel, and while you want to ignore them, ++ you need to know the values f.e. to support dual firmware ++ layouts on the flash. ++ + config HAVE_PERF_EVENTS + bool + help |