diff options
| -rw-r--r-- | arch/x86/machine/atomic.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/x86/machine/atomic.h b/arch/x86/machine/atomic.h index 3fe3ade9..3b2ede51 100644 --- a/arch/x86/machine/atomic.h +++ b/arch/x86/machine/atomic.h @@ -42,6 +42,11 @@ : "+m" (*(ptr)) \ : "r" (bits)) +#define ATOMIC_XOR(ptr, bits) \ + asm volatile("lock xor %1, %0" \ + : "+m" (*(ptr)) \ + : "r" (bits)) + /* The xchg instruction doesn't need a lock prefix */ #define ATOMIC_SWAP(ptr, oldval, newval) \ asm volatile("xchg %1, %0" \ @@ -85,6 +90,12 @@ atomic_or_uint(volatile unsigned int *ptr, unsigned int bits) ATOMIC_OR(ptr, bits); } +static inline void +atomic_xor_uint(volatile unsigned int *ptr, unsigned int bits) +{ + ATOMIC_XOR(ptr, bits); +} + /* * Implies a full memory barrier. */ @@ -140,6 +151,12 @@ atomic_or_ulong(volatile unsigned long *ptr, unsigned long bits) ATOMIC_OR(ptr, bits); } +static inline void +atomic_xor_ulong(volatile unsigned long *ptr, unsigned long bits) +{ + ATOMIC_XOR(ptr, bits); +} + /* * Implies a full memory barrier. */ |