linux-kernel - [tip:x86/numa] x86-32, numa: Fix failure condition check in alloc

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Message-ID: <tip-3fe14ab541cd9b0d1f243afb7556046f12c8743c@git.kernel.org>
Date:	Thu, 7 Apr 2011 02:03:57 GMT
From:	tip-bot for 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, tj@...nel.org, tglx@...utronix.de,
	rientjes@...gle.com
Subject: [tip:x86/numa] x86-32, numa: Fix failure condition check in alloc_remap()

Commit-ID:  3fe14ab541cd9b0d1f243afb7556046f12c8743c
Gitweb:     http://git.kernel.org/tip/3fe14ab541cd9b0d1f243afb7556046f12c8743c
Author:     Tejun Heo <tj@...nel.org>
AuthorDate: Tue, 5 Apr 2011 00:23:47 +0200
Committer:  H. Peter Anvin <hpa@...or.com>
CommitDate: Wed, 6 Apr 2011 17:56:46 -0700

x86-32, numa: Fix failure condition check in alloc_remap()

node_remap_{start|end}_vaddr[] describe [start, end) ranges; however,
alloc_remap() incorrectly failed when the current allocation + size
equaled the end but it should fail only when it goes over.  Fix it.

Signed-off-by: Tejun Heo <tj@...nel.org>
Link: http://lkml.kernel.org/r/1301955840-7246-2-git-send-email-tj@kernel.org
Acked-by: Yinghai Lu <yinghai@...nel.org>
Cc: David Rientjes <rientjes@...gle.com>
Signed-off-by: H. Peter Anvin <hpa@...or.com>
---
 arch/x86/mm/numa_32.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/mm/numa_32.c b/arch/x86/mm/numa_32.c
index bde3906..84aac47 100644
--- a/arch/x86/mm/numa_32.c
+++ b/arch/x86/mm/numa_32.c
@@ -200,7 +200,7 @@ void *alloc_remap(int nid, unsigned long size)
 
 	size = ALIGN(size, L1_CACHE_BYTES);
 
-	if (!allocation || (allocation + size) >= node_remap_end_vaddr[nid])
+	if (!allocation || (allocation + size) > node_remap_end_vaddr[nid])
 		return NULL;
 
 	node_remap_alloc_vaddr[nid] += size;
--
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