From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Wed, 12 Feb 2014 21:02:22 +0000 (-0800)
Subject: notifier: Substitute rcu_access_pointer() for rcu_dereference_raw()
X-Git-Tag: v3.15-rc1~183^2~1^2~1^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8857563b819b140aa8c9be920cfe44d5d3f808b7;p=pandora-kernel.git

notifier: Substitute rcu_access_pointer() for rcu_dereference_raw()

(Trivial patch.)

If the code is looking at the RCU-protected pointer itself, but not
dereferencing it, the rcu_dereference() functions can be downgraded
to rcu_access_pointer().  This commit makes this downgrade in
__blocking_notifier_call_chain() which simply compares the RCU-protected
pointer against NULL with no dereferencing.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Josh Triplett <josh@joshtriplett.org>
---

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