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[S390] cmpxchg: implement cmpxchg64()
authorHeiko Carstens <heiko.carstens@de.ibm.com>
Wed, 23 Mar 2011 09:16:06 +0000 (10:16 +0100)
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>
Wed, 23 Mar 2011 09:16:00 +0000 (10:16 +0100)
We have a cmpxchg64_local() implementation but strange enough the
SMP capable variant cmpxchg64() is missing. So implement it.

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

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