From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Sat, 27 Jul 2013 03:47:42 +0000 (-0700)
Subject: rcu: Simplify _rcu_barrier() processing
X-Git-Tag: v3.12-rc1~170^2^2^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=458fb381eacdd23366cfa2fbdf5a467848683e3a;p=pandora-kernel.git

rcu: Simplify _rcu_barrier() processing

This commit drops an unneeded ACCESS_ONCE() and simplifies an "our work
is done" check in _rcu_barrier().  This applies feedback from Linus
(https://lkml.org/lkml/2013/7/26/777) that he gave to similar code
in an unrelated patch.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
[ paulmck: Fix comment to match code, reported by Lai Jiangshan. ]
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