From: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Date: Tue, 8 May 2007 07:27:25 +0000 (-0700)
Subject: Fix race between attach_task and cpuset_exit
X-Git-Tag: v2.6.22-rc1~713
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dd9037a26a1e6ebec9121b4681c414dc77189a90;p=pandora-kernel.git

Fix race between attach_task and cpuset_exit

Currently cpuset_exit() changes the exiting task's ->cpuset pointer w/o
taking task_lock().  This can lead to ugly races between attach_task and
cpuset_exit.  Details of the races are described at
http://lkml.org/lkml/2007/3/24/132.

Patch below closes those races.

Signed-off-by: Srivatsa Vaddagiri <vatsa@in.ibm.com>
Cc: Paul Jackson <pj@sgi.com>
Cc: Balbir Singh <balbir@in.ibm.com>
Cc: Paul Menage <menage@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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