diff options
Diffstat (limited to 'arch/sparc/lib/atomic32.c')
| -rw-r--r-- | arch/sparc/lib/atomic32.c | 45 |
1 files changed, 20 insertions, 25 deletions
diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c index cf80d1ae352b..8ae880ebf07a 100644 --- a/arch/sparc/lib/atomic32.c +++ b/arch/sparc/lib/atomic32.c @@ -159,32 +159,27 @@ unsigned long sp32___change_bit(unsigned long *addr, unsigned long mask) } EXPORT_SYMBOL(sp32___change_bit); -unsigned long __cmpxchg_u32(volatile u32 *ptr, u32 old, u32 new) -{ - unsigned long flags; - u32 prev; - - spin_lock_irqsave(ATOMIC_HASH(ptr), flags); - if ((prev = *ptr) == old) - *ptr = new; - spin_unlock_irqrestore(ATOMIC_HASH(ptr), flags); - - return (unsigned long)prev; -} +#define CMPXCHG(T) \ + T __cmpxchg_##T(volatile T *ptr, T old, T new) \ + { \ + unsigned long flags; \ + T prev; \ + \ + spin_lock_irqsave(ATOMIC_HASH(ptr), flags); \ + if ((prev = *ptr) == old) \ + *ptr = new; \ + spin_unlock_irqrestore(ATOMIC_HASH(ptr), flags);\ + \ + return prev; \ + } + +CMPXCHG(u8) +CMPXCHG(u16) +CMPXCHG(u32) +CMPXCHG(u64) +EXPORT_SYMBOL(__cmpxchg_u8); +EXPORT_SYMBOL(__cmpxchg_u16); EXPORT_SYMBOL(__cmpxchg_u32); - -u64 __cmpxchg_u64(u64 *ptr, u64 old, u64 new) -{ - unsigned long flags; - u64 prev; - - spin_lock_irqsave(ATOMIC_HASH(ptr), flags); - if ((prev = *ptr) == old) - *ptr = new; - spin_unlock_irqrestore(ATOMIC_HASH(ptr), flags); - - return prev; -} EXPORT_SYMBOL(__cmpxchg_u64); unsigned long __xchg_u32(volatile u32 *ptr, u32 new) |