From: Will Deacon <will.deacon@arm.com>
Date: Mon, 12 Aug 2013 17:03:26 +0000 (+0100)
Subject: ARM: 7811/1: locks: use early clobber in arch_spin_trylock
X-Git-Tag: v3.11-rc6~5^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=afa31d8eb86fc2f25083e675d57ac8173a98f999;p=pandora-kernel.git

ARM: 7811/1: locks: use early clobber in arch_spin_trylock

The res variable is written before we've finished with the input
operands (namely the lock address), so ensure that we mark it as `early
clobber' to avoid unintended register sharing.

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