183 #define arch_read_can_lock(rw)		((rw)->lock >= 0)  argument
184 #define arch_write_can_lock(rw)	(!(rw)->lock)  argument
198 static inline long __arch_read_trylock(arch_rwlock_t *rw)  in __arch_read_trylock()  argument
212 	: "r" (&rw->lock)  in __arch_read_trylock()
222 static inline long __arch_write_trylock(arch_rwlock_t *rw)  in __arch_write_trylock()  argument
236 	: "r" (token), "r" (&rw->lock)  in __arch_write_trylock()
242 static inline void arch_read_lock(arch_rwlock_t *rw)  in arch_read_lock()  argument
245 		if (likely(__arch_read_trylock(rw) > 0))  in arch_read_lock()
250 				__rw_yield(rw);  in arch_read_lock()
251 		} while (unlikely(rw->lock < 0));  in arch_read_lock()
256 static inline void arch_write_lock(arch_rwlock_t *rw)  in arch_write_lock()  argument
259 		if (likely(__arch_write_trylock(rw) == 0))  in arch_write_lock()
264 				__rw_yield(rw);  in arch_write_lock()
265 		} while (unlikely(rw->lock != 0));  in arch_write_lock()
270 static inline int arch_read_trylock(arch_rwlock_t *rw)  in arch_read_trylock()  argument
272 	return __arch_read_trylock(rw) > 0;  in arch_read_trylock()
275 static inline int arch_write_trylock(arch_rwlock_t *rw)  in arch_write_trylock()  argument
277 	return __arch_write_trylock(rw) == 0;  in arch_write_trylock()
280 static inline void arch_read_unlock(arch_rwlock_t *rw)  in arch_read_unlock()  argument
293 	: "r"(&rw->lock)  in arch_read_unlock()
297 static inline void arch_write_unlock(arch_rwlock_t *rw)  in arch_write_unlock()  argument
301 	rw->lock = 0;  in arch_write_unlock()