From mboxrd@z Thu Jan 1 00:00:00 1970 From: Katsuya Matsubara Subject: [PATCH RT 3/4] sh: decouple the pagefault-disabled logic Date: Thu, 12 Feb 2009 00:01:42 +0900 Message-ID: <1234364503-857-4-git-send-email-matsu@igel.co.jp> References: <1234364503-857-1-git-send-email-matsu@igel.co.jp> <1234364503-857-2-git-send-email-matsu@igel.co.jp> <1234364503-857-3-git-send-email-matsu@igel.co.jp> Cc: Steven Rostedt , Ingo Molnar , Thomas Gleixner , Paul Mundt , LKML , Katsuya Matsubara To: linux-rt-users Return-path: Received: from mailhost.igel.co.jp ([219.106.231.130]:41198 "EHLO mailhost.igel.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752567AbZBKPXY (ORCPT ); Wed, 11 Feb 2009 10:23:24 -0500 In-Reply-To: <1234364503-857-3-git-send-email-matsu@igel.co.jp> Sender: linux-rt-users-owner@vger.kernel.org List-ID: The preempt-rt patch adds a pagefault-disabled logic. We must not take page faults if pagefault_disabled > 0. The same treatment can be found in other arch code. Signed-off-by: Katsuya Matsubara --- arch/sh/mm/fault_32.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/arch/sh/mm/fault_32.c b/arch/sh/mm/fault_32.c index 898d477..2746b08 100644 --- a/arch/sh/mm/fault_32.c +++ b/arch/sh/mm/fault_32.c @@ -100,7 +100,7 @@ asmlinkage void __kprobes do_page_fault(struct pt_regs *regs, * If we're in an interrupt or have no user * context, we must not take the fault.. */ - if (in_atomic() || !mm) + if (in_atomic() || !mm || current->pagefault_disabled) goto no_context; down_read(&mm->mmap_sem); -- 1.6.1