From bf67fd3142dc605ded9b5e063e35b47c2bb21cb1 Mon Sep 17 00:00:00 2001
From: Will Deacon <will.deacon@arm.com>
Date: Wed, 9 Jul 2014 19:31:28 +0100
Subject: [PATCH] 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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