From 61b0b01686d482205db14987826e1a11dd17d65c Mon Sep 17 00:00:00 2001
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Thu, 19 Feb 2015 17:53:16 +0100
Subject: [PATCH] s390/spinlock: disabled compare-and-delay by default

Until we have hard performance data about the effects of CAD in the
spinlock loop disable the instruction by default.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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