From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Tue, 3 Dec 2013 17:24:02 +0000 (-0800)
Subject: rcu: Add ACCESS_ONCE() to ->n_force_qs_lh accesses
X-Git-Tag: v3.15-rc1~183^2~1^2~1^2~11
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3660c2813fb6d0ba48ee44bcbf9feddf7218c11d;p=pandora-kernel.git

rcu: Add ACCESS_ONCE() to ->n_force_qs_lh accesses

The ->n_force_qs_lh field is accessed without the benefit of any
synchronization, so this commit adds the needed ACCESS_ONCE() wrappers.
Yes, increments to ->n_force_qs_lh can be lost, but contention should
be low and the field is strictly statistical in nature, so this is not
a problem.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
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