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[POWERPC] Fix kernel panic in arch_arm_kprobe

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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>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Ionut Nicu 2008-03-06 03:12:54 +11:00 committed by Paul Mackerras
parent 0119536cd3
commit 221ac329e9
1 changed files with 2 additions and 1 deletions
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include/asm-powerpc/pgtable-ppc32.h
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@ -420,7 +420,8 @@ 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