__atomic_op_acquire 17 include/linux/atomic-fallback.h __atomic_op_acquire(xchg, __VA_ARGS__) __atomic_op_acquire 40 include/linux/atomic-fallback.h __atomic_op_acquire(cmpxchg, __VA_ARGS__) __atomic_op_acquire 63 include/linux/atomic-fallback.h __atomic_op_acquire(cmpxchg64, __VA_ARGS__)