From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from de01egw01.freescale.net (de01egw01.freescale.net [192.88.165.102]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "de01egw01.freescale.net", Issuer "Thawte Premium Server CA" (verified OK)) by ozlabs.org (Postfix) with ESMTP id 7A739DE036 for ; Thu, 6 Mar 2008 03:34:33 +1100 (EST) Received: from de01smr02.am.mot.com (de01smr02.freescale.net [10.208.0.151]) by de01egw01.freescale.net (8.12.11/de01egw01) with ESMTP id m25GQx4o028682 for ; Wed, 5 Mar 2008 09:34:25 -0700 (MST) From: Ionut Nicu To: linuxppc-dev@ozlabs.org Subject: [PATCH] Fix kernel panic in arch_arm_kprobe Date: Wed, 5 Mar 2008 18:12:54 +0200 Message-Id: <1204733574-7445-1-git-send-email-ionut.nicu@freescale.com> Cc: Ionut Nicu List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 --- 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