From: Will Deacon <will.deacon@arm.com>
Date: Wed, 9 Jul 2014 18:31:28 +0000 (+0100)
Subject: ARM: 8098/1: mcs lock: implement wfe-based polling for MCS locking
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~160^2~2^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bf67fd3142dc605ded9b5e063e35b47c2bb21cb1;p=pandora-kernel.git

ARM: 8098/1: mcs lock: implement wfe-based polling for MCS locking

This patch introduces a wfe-based polling loop for spinning on contended
MCS locks and waking up corresponding waiters when the lock is released.

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