diff options
Diffstat (limited to 'arch/x86/include/asm/atomic.h')
-rw-r--r-- | arch/x86/include/asm/atomic.h | 69 |
1 files changed, 46 insertions, 23 deletions
diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h index 33380b871463..0874ebda3069 100644 --- a/arch/x86/include/asm/atomic.h +++ b/arch/x86/include/asm/atomic.h @@ -197,35 +197,56 @@ static inline int atomic_xchg(atomic_t *v, int new) return xchg(&v->counter, new); } -#define ATOMIC_OP(op) \ -static inline void atomic_##op(int i, atomic_t *v) \ -{ \ - asm volatile(LOCK_PREFIX #op"l %1,%0" \ - : "+m" (v->counter) \ - : "ir" (i) \ - : "memory"); \ +static inline void atomic_and(int i, atomic_t *v) +{ + asm volatile(LOCK_PREFIX "andl %1,%0" + : "+m" (v->counter) + : "ir" (i) + : "memory"); +} + +static inline int atomic_fetch_and(int i, atomic_t *v) +{ + int val = atomic_read(v); + + do { } while (!atomic_try_cmpxchg(v, &val, val & i)); + + return val; } -#define ATOMIC_FETCH_OP(op, c_op) \ -static inline int atomic_fetch_##op(int i, atomic_t *v) \ -{ \ - int val = atomic_read(v); \ - do { \ - } while (!atomic_try_cmpxchg(v, &val, val c_op i)); \ - return val; \ +static inline void atomic_or(int i, atomic_t *v) +{ + asm volatile(LOCK_PREFIX "orl %1,%0" + : "+m" (v->counter) + : "ir" (i) + : "memory"); } -#define ATOMIC_OPS(op, c_op) \ - ATOMIC_OP(op) \ - ATOMIC_FETCH_OP(op, c_op) +static inline int atomic_fetch_or(int i, atomic_t *v) +{ + int val = atomic_read(v); -ATOMIC_OPS(and, &) -ATOMIC_OPS(or , |) -ATOMIC_OPS(xor, ^) + do { } while (!atomic_try_cmpxchg(v, &val, val | i)); -#undef ATOMIC_OPS -#undef ATOMIC_FETCH_OP -#undef ATOMIC_OP + return val; +} + +static inline void atomic_xor(int i, atomic_t *v) +{ + asm volatile(LOCK_PREFIX "xorl %1,%0" + : "+m" (v->counter) + : "ir" (i) + : "memory"); +} + +static inline int atomic_fetch_xor(int i, atomic_t *v) +{ + int val = atomic_read(v); + + do { } while (!atomic_try_cmpxchg(v, &val, val ^ i)); + + return val; +} /** * __atomic_add_unless - add unless the number is already a given value @@ -239,10 +260,12 @@ ATOMIC_OPS(xor, ^) static __always_inline int __atomic_add_unless(atomic_t *v, int a, int u) { int c = atomic_read(v); + do { if (unlikely(c == u)) break; } while (!atomic_try_cmpxchg(v, &c, c + a)); + return c; } |