__atomic_op_release 22 include/linux/atomic-fallback.h __atomic_op_release(xchg, __VA_ARGS__) __atomic_op_release 45 include/linux/atomic-fallback.h __atomic_op_release(cmpxchg, __VA_ARGS__) __atomic_op_release 68 include/linux/atomic-fallback.h __atomic_op_release(cmpxchg64, __VA_ARGS__)