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s390: enable ARCH_USE_CMPXCHG_LOCKREF
authorHeiko Carstens <heiko.carstens@de.ibm.com>
Thu, 5 Sep 2013 11:26:17 +0000 (13:26 +0200)
committerHeiko Carstens <heiko.carstens@de.ibm.com>
Sat, 28 Sep 2013 10:46:29 +0000 (12:46 +0200)
Enable ARCH_USE_CMPXCHG_LOCKREF since it shows performance improvements
with Linus' simple stat() test case of up to 50% on a 30 cpu system.

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

No differences found
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