From: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Mon, 17 Feb 2014 21:35:57 +0000 (-0800)
Subject: block: Substitute rcu_access_pointer() for rcu_dereference_raw()
X-Git-Tag: v3.15-rc1~135^2~22
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ec6c676a08b0779a32c9cec9fae7532add32fe15;p=pandora-kernel.git

block: 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 blkg_destroy()
and ioc_destroy_icq(), both of which simply compare the RCU-protected
pointer against another pointer with no dereferencing.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Jens Axboe <axboe@fb.com>
---

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