linux-kernel - [tip:x86/debug] x86: Suppress stack overrun message for init

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Date:	Mon, 23 Nov 2009 11:53:28 GMT
From:	tip-bot for Jan Beulich <JBeulich@...ell.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	jbeulich@...ell.com, JBeulich@...ell.com, tglx@...utronix.de,
	mingo@...e.hu
Subject: [tip:x86/debug] x86: Suppress stack overrun message for init_task

Commit-ID:  0e7810be30f66e9f430c4ce2cd3b14634211690f
Gitweb:     http://git.kernel.org/tip/0e7810be30f66e9f430c4ce2cd3b14634211690f
Author:     Jan Beulich <JBeulich@...ell.com>
AuthorDate: Fri, 20 Nov 2009 14:00:14 +0000
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Mon, 23 Nov 2009 11:45:34 +0100

x86: Suppress stack overrun message for init_task

init_task doesn't get its stack end location set to
STACK_END_MAGIC, and hence the message is confusing
rather than helpful in this case.

Signed-off-by: Jan Beulich <jbeulich@...ell.com>
LKML-Reference: <4B06AEFE02000078000211F4@....id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>
---
 arch/x86/mm/fault.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index f4cee90..071eee6 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -658,7 +658,7 @@ no_context(struct pt_regs *regs, unsigned long error_code,
 	show_fault_oops(regs, error_code, address);
 
 	stackend = end_of_stack(tsk);
-	if (*stackend != STACK_END_MAGIC)
+	if (tsk != &init_task && *stackend != STACK_END_MAGIC)
 		printk(KERN_ALERT "Thread overran stack, or stack corrupted\n");
 
 	tsk->thread.cr2		= address;
--
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