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s390/cmpxchg: select HAVE_CMPXCHG_LOCAL option
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Now that hopefully all cmpxchg/xchg bugs have been fixed select
HAVE_CMPXCHG_LOCAL option which uncovered a couple of bugs on s390.

The only call site which is affected seems to be within mm/vmstat.c.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored and Martin Schwidefsky committed May 30, 2012
1 parent 1896d25 commit 2e30db9
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Expand Up @@ -93,6 +93,7 @@ config S390
select ARCH_SAVE_PAGE_KEYS if HIBERNATION
select HAVE_MEMBLOCK
select HAVE_MEMBLOCK_NODE_MAP
select HAVE_CMPXCHG_LOCAL
select ARCH_DISCARD_MEMBLOCK
select ARCH_INLINE_SPIN_TRYLOCK
select ARCH_INLINE_SPIN_TRYLOCK_BH
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