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Diffstat (limited to 'arch/parisc/include/asm/cmpxchg.h')
-rw-r--r--arch/parisc/include/asm/cmpxchg.h22
1 files changed, 10 insertions, 12 deletions
diff --git a/arch/parisc/include/asm/cmpxchg.h b/arch/parisc/include/asm/cmpxchg.h
index c1d776bb16b4..bf0a0f1189eb 100644
--- a/arch/parisc/include/asm/cmpxchg.h
+++ b/arch/parisc/include/asm/cmpxchg.h
@@ -56,26 +56,24 @@ __arch_xchg(unsigned long x, volatile void *ptr, int size)
/* bug catcher for when unsupported size is used - won't link */
extern void __cmpxchg_called_with_bad_pointer(void);
-/* __cmpxchg_u32/u64 defined in arch/parisc/lib/bitops.c */
-extern unsigned long __cmpxchg_u32(volatile unsigned int *m, unsigned int old,
- unsigned int new_);
-extern u64 __cmpxchg_u64(volatile u64 *ptr, u64 old, u64 new_);
+/* __cmpxchg_u... defined in arch/parisc/lib/bitops.c */
extern u8 __cmpxchg_u8(volatile u8 *ptr, u8 old, u8 new_);
+extern u16 __cmpxchg_u16(volatile u16 *ptr, u16 old, u16 new_);
+extern u32 __cmpxchg_u32(volatile u32 *m, u32 old, u32 new_);
+extern u64 __cmpxchg_u64(volatile u64 *ptr, u64 old, u64 new_);
/* don't worry...optimizer will get rid of most of this */
static inline unsigned long
__cmpxchg(volatile void *ptr, unsigned long old, unsigned long new_, int size)
{
- switch (size) {
+ return
#ifdef CONFIG_64BIT
- case 8: return __cmpxchg_u64((u64 *)ptr, old, new_);
+ size == 8 ? __cmpxchg_u64(ptr, old, new_) :
#endif
- case 4: return __cmpxchg_u32((unsigned int *)ptr,
- (unsigned int)old, (unsigned int)new_);
- case 1: return __cmpxchg_u8((u8 *)ptr, old & 0xff, new_ & 0xff);
- }
- __cmpxchg_called_with_bad_pointer();
- return old;
+ size == 4 ? __cmpxchg_u32(ptr, old, new_) :
+ size == 2 ? __cmpxchg_u16(ptr, old, new_) :
+ size == 1 ? __cmpxchg_u8(ptr, old, new_) :
+ (__cmpxchg_called_with_bad_pointer(), old);
}
#define arch_cmpxchg(ptr, o, n) \