tree 0d21a21c2b87ef1c8db600d6abed3ba3e22cdaef
parent 7682455ec36fce70bdbad9f739de05060dedfa27
author Paul Menage <menage@google.com> 1243396022 -0700
committer David S. Miller <davem@davemloft.net> 1243396022 -0700

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>