[PATCH] Fix kernel panic in arch_arm_kprobe

[PATCH] Fix kernel panic in arch_arm_kprobe

[Ionut Nicu]

The code in arch_arm_kprobe was trying to set a breakpoint which
resulted in a page fault because the kernel text pages were write
protected. Disable the write protect when CONFIG_KPROBES is defined.

Signed-off-by: Ionut Nicu <ionut.nicu@freescale.com>
---
 include/asm-powerpc/pgtable-ppc32.h |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/include/asm-powerpc/pgtable-ppc32.h b/include/asm-powerpc/pgtable-ppc32.h
index d1332bb..ce66f72 100644
--- a/include/asm-powerpc/pgtable-ppc32.h
+++ b/include/asm-powerpc/pgtable-ppc32.h
@@ -428,7 +428,8 @@ extern int icache_44x_need_flush;
 #define _PAGE_IO	(_PAGE_KERNEL | _PAGE_NO_CACHE | _PAGE_GUARDED)
 #define _PAGE_RAM	(_PAGE_KERNEL | _PAGE_HWEXEC)
 
-#if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH)
+#if defined(CONFIG_KGDB) || defined(CONFIG_XMON) || defined(CONFIG_BDI_SWITCH) ||\
+	defined(CONFIG_KPROBES)
 /* We want the debuggers to be able to set breakpoints anywhere, so
  * don't write protect the kernel text */
 #define _PAGE_RAM_TEXT	_PAGE_RAM
-- 
1.5.4.2