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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 | 6f5acae617f25e580e8559ee15be66dcf4c2ebcc (patch) | |
| tree | ad32895ca26cd1672e9e52bf338cac317a617212 /target/linux/generic/patches-3.18/995-mangle_bootargs.patch | |
| parent | 6a7e2baea5a5f346e5df0ada343be2a5b83c7b6d (diff) | |
| download | upstream-6f5acae617f25e580e8559ee15be66dcf4c2ebcc.tar.gz upstream-6f5acae617f25e580e8559ee15be66dcf4c2ebcc.tar.bz2 upstream-6f5acae617f25e580e8559ee15be66dcf4c2ebcc.zip | |
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>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@45196 3c298f89-4303-0410-b956-a3cf2f4a3e73
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 0000000000..5d56cf4462 --- /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 |