From: Paul Menage <menage@google.com>
Date: Wed, 27 May 2009 03:47:02 +0000 (-0700)
Subject: cls_cgroup: read classid atomically in classifier
X-Git-Tag: v2.6.30-rc8~9^2~13
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e65fcfd63a9a62baa5708484ff8edbe56eb3e7ec;p=pandora-kernel.git

cls_cgroup: read classid atomically in classifier

Avoid reading the unsynchronized value cs->classid multiple times,
since it could change concurrently from non-zero to zero; this would
result in the classifier returning a positive result with a bogus
(zero) classid.

Signed-off-by: Paul Menage <menage@google.com>
Reviewed-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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