From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Tue, 29 May 2012 04:54:32 +0000 (+0200)
Subject: s390/cmpxchg: add missing memory barrier to cmpxchg64
X-Git-Tag: v3.5-rc1~30^2~5
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0c44ca71f59447a5e602c45728829d1cb6a1b4b5;p=pandora-kernel.git

s390/cmpxchg: add missing memory barrier to cmpxchg64

All cmpxchg functions imply a memory barrier.
cmpxch64 did not have one for 31 bit code, so add it.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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