linux-kernel - [tip:x86/urgent] x86,percpu: fix inverted NUMA test in setup_pcpu

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Date:	Thu, 2 Apr 2009 04:09:32 GMT
From:	Tejun Heo <tj@...nel.org>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com,
	yinghai@...nel.org, davem@...emloft.net, tj@...nel.org,
	tglx@...utronix.de, mingo@...e.hu
Subject: [tip:x86/urgent] x86,percpu: fix inverted NUMA test in setup_pcpu_remap()

Commit-ID:  eb12ce60c81826a99eadbc56401e08ceb37a0cc2
Gitweb:     http://git.kernel.org/tip/eb12ce60c81826a99eadbc56401e08ceb37a0cc2
Author:     Tejun Heo <tj@...nel.org>
AuthorDate: Wed, 1 Apr 2009 15:06:33 +0900
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Thu, 2 Apr 2009 06:08:05 +0200

x86,percpu: fix inverted NUMA test in setup_pcpu_remap()

setup_percpu_remap() is for NUMA machines yet it bailed out with
-EINVAL if pcpu_need_numa().  Fix the inverted condition.

This problem was reported by David Miller and verified by Yinhai Lu.

Reported-by: David Miller <davem@...emloft.net>
Reported-by: Yinghai Lu <yinghai@...nel.org>
Signed-off-by: Tejun Heo <tj@...nel.org>
LKML-Reference: <49D30469.8020006@...nel.org>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 arch/x86/kernel/setup_percpu.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kernel/setup_percpu.c b/arch/x86/kernel/setup_percpu.c
index 400331b..876b127 100644
--- a/arch/x86/kernel/setup_percpu.c
+++ b/arch/x86/kernel/setup_percpu.c
@@ -162,7 +162,7 @@ static ssize_t __init setup_pcpu_remap(size_t static_size)
 	 * If large page isn't supported, there's no benefit in doing
 	 * this.  Also, on non-NUMA, embedding is better.
 	 */
-	if (!cpu_has_pse || pcpu_need_numa())
+	if (!cpu_has_pse || !pcpu_need_numa())
 		return -EINVAL;
 
 	last = NULL;
--
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