x86: Disable KPROBES with DEBUG_RODATA for now

Right now Kprobes cannot write to the write protected kernel text when
DEBUG_RODATA is enabled. Disallow this in Kconfig for now.

Temporary fix for 2.6.22. In .23 add code to temporarily
unprotect it.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/i386/Kconfig.debug

@@ -49,6 +49,7 @@ config DEBUG_PAGEALLOC
 config DEBUG_RODATA
 	bool "Write protect kernel read-only data structures"
 	depends on DEBUG_KERNEL
+	depends on !KPROBES # temporary for 2.6.22
 	help
 	  Mark the kernel read-only data as write-protected in the pagetables,
 	  in order to catch accidental (and incorrect) writes to such const

arch/x86_64/Kconfig.debug

@@ -9,6 +9,7 @@ source "lib/Kconfig.debug"
 config DEBUG_RODATA
        bool "Write protect kernel read-only data structures"
        depends on DEBUG_KERNEL
+       depends on !KPROBES # temporary for 2.6.22
        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.