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- --- a/init/main.c
- +++ b/init/main.c
- @@ -352,6 +352,29 @@ static inline void setup_nr_cpu_ids(void
- static inline void smp_prepare_cpus(unsigned int maxcpus) { }
- #endif
-
- +#ifdef CONFIG_MANGLE_BOOTARGS
- +static void __init mangle_bootargs(char *command_line)
- +{
- + char *rootdev;
- + char *rootfs;
- +
- + rootdev = strstr(command_line, "root=/dev/mtdblock");
- +
- + if (rootdev)
- + strncpy(rootdev, "mangled_rootblock=", 18);
- +
- + rootfs = strstr(command_line, "rootfstype");
- +
- + if (rootfs)
- + strncpy(rootfs, "mangled_fs", 10);
- +
- +}
- +#else
- +static void __init mangle_bootargs(char *command_line)
- +{
- +}
- +#endif
- +
- /*
- * We need to store the untouched command line for future reference.
- * We also need to store the touched command line since the parameter
- @@ -522,6 +545,7 @@ 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
- @@ -1607,6 +1607,15 @@ 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
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