19 _raw_compare_and_swap(unsigned int *lock, unsigned int old, unsigned int new)  in _raw_compare_and_swap()  argument
21 	unsigned int old_expected = old;  in _raw_compare_and_swap()
25 		: "=d" (old), "=Q" (*lock)  in _raw_compare_and_swap()
26 		: "0" (old), "d" (new), "Q" (*lock)  in _raw_compare_and_swap()
28 	return old == old_expected;  in _raw_compare_and_swap()
141 	unsigned int old = ACCESS_ONCE(rw->lock);  in arch_read_trylock_once()  local
142 	return likely((int) old >= 0 &&  in arch_read_trylock_once()
143 		      _raw_compare_and_swap(&rw->lock, old, old + 1));  in arch_read_trylock_once()
148 	unsigned int old = ACCESS_ONCE(rw->lock);  in arch_write_trylock_once()  local
149 	return likely(old == 0 &&  in arch_write_trylock_once()
192 	unsigned int old;  in arch_read_lock()  local
194 	old = __RAW_LOCK(&rw->lock, 1, __RAW_OP_ADD);  in arch_read_lock()
195 	if ((int) old < 0)  in arch_read_lock()
206 	unsigned int old;  in arch_write_lock()  local
208 	old = __RAW_LOCK(&rw->lock, 0x80000000, __RAW_OP_OR);  in arch_write_lock()
209 	if (old != 0)  in arch_write_lock()
210 		_raw_write_lock_wait(rw, old);  in arch_write_lock()
233 	unsigned int old;  in arch_read_unlock()  local
236 		old = ACCESS_ONCE(rw->lock);  in arch_read_unlock()
237 	} while (!_raw_compare_and_swap(&rw->lock, old, old - 1));  in arch_read_unlock()