__futex_atomic_op1 62 arch/x86/include/asm/futex.h __futex_atomic_op1("xchgl %0, %2", ret, oldval, uaddr, oparg); __futex_atomic_op1 65 arch/x86/include/asm/futex.h __futex_atomic_op1(LOCK_PREFIX "xaddl %0, %2", ret, oldval,