From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Fri, 11 Sep 2009 08:28:34 +0000 (+0200)
Subject: [S390] atomic ops: add effecient atomic64 support for 31 bit
X-Git-Tag: v2.6.32-rc1~734^2~33
X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=12751058515860ed43c8f874ebcb2097b323736a;p=pandora-kernel.git

[S390] atomic ops: add effecient atomic64 support for 31 bit

Use compare double and swap to implement efficient atomic64 ops for 31 bit.

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