From: Li Zefan <lizf@cn.fujitsu.com>
Date: Thu, 2 Apr 2009 23:57:49 +0000 (-0700)
Subject: cpuset: fix possible races in cpu/memory hotplug
X-Git-Tag: v2.6.30-rc1~349
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0b4217b3fdddc4a58939720d3ed809537577d48b;p=pandora-kernel.git

cpuset: fix possible races in cpu/memory hotplug

Change to cpuset->cpus_allowed and cpuset->mems_allowed should be protected
by callback_mutex, otherwise the reader may read wrong cpus/mems. This is
cpuset's lock rule.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Paul Menage <menage@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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