target/linux/generic-2.6/patches-2.6.31/021-mips_image_cmdline_hack.patch

   1 --- a/arch/mips/kernel/setup.c
   2 +++ b/arch/mips/kernel/setup.c
   3 @@ -546,8 +546,28 @@ static void __init resource_init(void)
   4         }
   5  }
   6
   7 +#ifdef CONFIG_IMAGE_CMDLINE_HACK
   8 +static void __init process__image_cmdline(void)
   9 +{
  10 +       extern char __image_cmdline[];
  11 +
  12 +       if (__image_cmdline[0] == '\0')
  13 +               return;
  14 +
  15 +       if (__image_cmdline[0] == '-') {
  16 +               strlcpy(arcs_cmdline, __image_cmdline, sizeof(arcs_cmdline));
  17 +       } else {
  18 +               strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
  19 +               strlcat(arcs_cmdline, __image_cmdline, sizeof(arcs_cmdline));
  20 +       }
  21 +}
  22 +#else
  23 +static void inline process__image_cmdline(void) {}
  24 +#endif
  25 +
  26  void __init setup_arch(char **cmdline_p)
  27  {
  28 +       process__image_cmdline();
  29         cpu_probe();
  30         prom_init();
  31
  32 --- a/arch/mips/Kconfig
  33 +++ b/arch/mips/Kconfig
  34 @@ -840,6 +840,10 @@ config SYNC_R4K
  35  config MIPS_MACHINE
  36         def_bool n
  37
  38 +config IMAGE_CMDLINE_HACK
  39 +       bool "OpenWrt specific image command line hack"
  40 +       default n
  41 +
  42  config NO_IOPORT
  43         def_bool n
  44
  45 --- a/arch/mips/kernel/head.S
  46 +++ b/arch/mips/kernel/head.S
  47 @@ -143,6 +143,12 @@ FEXPORT(__kernel_entry)
  48         j       kernel_entry
  49  #endif
  50
  51 +#ifdef CONFIG_IMAGE_CMDLINE_HACK
  52 +       .ascii  "CMDLINE:"
  53 +EXPORT(__image_cmdline)
  54 +       .fill   0x400
  55 +#endif /* CONFIG_IMAGE_CMDLINE_HACK */
  56 +
  57         __REF
  58
  59  NESTED(kernel_entry, 16, sp)                   # kernel entry point