x86 boot : export boot_params via debugfs for debugging

This patch export the boot parameters via debugfs for debugging.

The files added are as follow:

boot_params/data    :  binary file for struct boot_params
boot_params/version :  boot protocol version

This patch is based on 2.6.24-rc5-mm1 and has been tested on i386 and
x86_64 platform.

This patch is based on the Peter Anvin's proposal.

Signed-off-by: Huang Ying <ying.huang@intel.com>

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 7 insertions, 0 deletions

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 660200915baa..15854b53badc 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -185,4 +185,11 @@ config DEFAULT_IO_DELAY_TYPE
         default IO_DELAY_TYPE_NONE
 endif
 
+config DEBUG_BOOT_PARAMS
+        bool "Debug boot parameters"
+        depends on DEBUG_KERNEL
+        depends on DEBUG_FS
+        help
+          This option will cause struct boot_params to be exported via debugfs.
+
 endmenu