From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Tue, 28 Oct 2014 04:11:27 +0000 (-0700)
Subject: rcu: Provide counterpart to rcu_dereference() for non-RCU situations
X-Git-Tag: omap-for-v3.19/fixes-not-urgent-part1~14^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=54ef6df3f3f1353d99c80c437259d317b2cd1cbd;p=pandora-kernel.git

rcu: Provide counterpart to rcu_dereference() for non-RCU situations

Although rcu_dereference() and friends can be used in situations where
object lifetimes are being managed by something other than RCU, the
resulting sparse and lockdep-RCU noise can be annoying.  This commit
therefore supplies a lockless_dereference(), which provides the
protection for dereferences without the RCU-related debugging noise.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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