From: Will Deacon <will.deacon@arm.com>
Date: Mon, 12 Aug 2013 17:04:05 +0000 (+0100)
Subject: ARM: 7812/1: rwlocks: retry trylock operation if strex fails on free lock
X-Git-Tag: v3.11-rc6~5^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=00efaa0250939dc148e2d3104fb3c18395d24a2d;p=pandora-kernel.git

ARM: 7812/1: rwlocks: retry trylock operation if strex fails on free lock

Commit 15e7e5c1ebf5 ("ARM: 7749/1: spinlock: retry trylock operation if
strex fails on free lock") modifying our arch_spin_trylock to retry the
acquisition if the lock appeared uncontended, but the strex failed.

This patch does the same for rwlocks, which were missed by the original
patch.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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