target/linux/generic/patches-4.0/995-mangle_bootargs.patch

   1 --- a/init/main.c
   2 +++ b/init/main.c
   3 @@ -368,6 +368,26 @@ static void __init setup_command_line(ch
   4         strcpy(static_command_line, command_line);
   5  }
   6
   7 +#ifdef CONFIG_MANGLE_BOOTARGS
   8 +static void __init mangle_bootargs(char *command_line)
   9 +{
  10 +       char *rootdev;
  11 +       char *rootfs;
  12 +
  13 +       rootdev = strstr(command_line, "root=/dev/mtdblock");
  14 +       strncpy(rootdev, "mangled_rootblock=", 18);
  15 +
  16 +       rootfs = strstr(command_line, "rootfstype");
  17 +       strncpy(rootfs, "mangled_fs", 10);
  18 +
  19 +}
  20 +#else
  21 +static void __init mangle_bootargs(char *command_line)
  22 +{
  23 +}
  24 +#endif
  25 +
  26 +
  27  /*
  28   * We need to finalize in a non-__init function or else race conditions
  29   * between the root thread and the init thread may cause start_kernel to
  30 @@ -519,6 +539,7 @@ asmlinkage __visible void __init start_k
  31         pr_notice("%s", linux_banner);
  32         setup_arch(&command_line);
  33         mm_init_cpumask(&init_mm);
  34 +       mangle_bootargs(command_line);
  35         setup_command_line(command_line);
  36         setup_nr_cpu_ids();
  37         setup_per_cpu_areas();
  38 --- a/init/Kconfig
  39 +++ b/init/Kconfig
  40 @@ -1583,6 +1583,15 @@ config EMBEDDED
  41           an embedded system so certain expert options are available
  42           for configuration.
  43
  44 +config MANGLE_BOOTARGS
  45 +       bool "Rename offending bootargs"
  46 +       depends on EXPERT
  47 +       help
  48 +         Sometimes the bootloader passed bogus root= and rootfstype=
  49 +         parameters to the kernel, and while you want to ignore them,
  50 +         you need to know the values f.e. to support dual firmware
  51 +         layouts on the flash.
  52 +
  53  config HAVE_PERF_EVENTS
  54         bool
  55         help