x86: fix DEBUG_RODATA kconfig text

fix kconfig text and make DEBUG_RODATA default.

this helps debugging quite a bit.

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

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 0a82b889d76ea236f521477b680e2d79b01b253b..9bb61e1aed69c5311b3df96256460c15886ef3fd 100644 (file)
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -61,13 +61,13 @@ config DEBUG_PER_CPU_MAPS
 
 config DEBUG_RODATA
        bool "Write protect kernel read-only data structures"
+       default y
        depends on DEBUG_KERNEL
        help
          Mark the kernel read-only data as write-protected in the pagetables,
          in order to catch accidental (and incorrect) writes to such const
-         data. This option may have a slight performance impact because a
-         portion of the kernel code won't be covered by a 2MB TLB anymore.
-         If in doubt, say "N".
+         data. This is recommended so that we can catch kernel bugs sooner.
+         If in doubt, say "Y".
 
 config 4KSTACKS
        bool "Use 4Kb for kernel stacks instead of 8Kb"