From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Tue, 29 May 2012 09:21:27 +0000 (+0200)
Subject: s390/cmpxchg: select HAVE_CMPXCHG_LOCAL option
X-Git-Tag: v3.5-rc1~30^2~1
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=2e30db9522837e2a5d30ce1e66afb0a7ee0ff350;p=users%2Fjedix%2Flinux-maple.git

s390/cmpxchg: select HAVE_CMPXCHG_LOCAL option

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>
---

diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index e16390c0bca8..57c86da61c19 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -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