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s390/cmpxchg: simplify cmpxchg_double 

Since sizeof(long) == 4 is always false now, simplify cmpxchg_double a bit.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2015-02-14 11:10:14 +01:00 committed by Martin Schwidefsky
parent a876cb3f6b
commit 26f15caaf9
1 changed files with 1 additions and 6 deletions
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7
arch/s390/include/asm/cmpxchg.h
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@ -80,15 +80,10 @@ extern void __cmpxchg_double_called_with_bad_pointer(void);
({ \
__typeof__(p1) __p1 = (p1); \
__typeof__(p2) __p2 = (p2); \
int __ret; \
BUILD_BUG_ON(sizeof(*(p1)) != sizeof(long)); \
BUILD_BUG_ON(sizeof(*(p2)) != sizeof(long)); \
VM_BUG_ON((unsigned long)((__p1) + 1) != (unsigned long)(__p2));\
if (sizeof(long) == 4) \
__ret = __cmpxchg_double_4(__p1, __p2, o1, o2, n1, n2); \
else \
__ret = __cmpxchg_double_8(__p1, __p2, o1, o2, n1, n2); \
__ret; \
__cmpxchg_double_8(__p1, __p2, o1, o2, n1, n2); \
})
#define system_has_cmpxchg_double() 1