185 #define arch_read_can_lock(rw)		((rw)->lock >= 0)  argument
186 #define arch_write_can_lock(rw)	(!(rw)->lock)  argument
200 static inline long __arch_read_trylock(arch_rwlock_t *rw)  in __arch_read_trylock()  argument
214 	: "r" (&rw->lock)  in __arch_read_trylock()
224 static inline long __arch_write_trylock(arch_rwlock_t *rw)  in __arch_write_trylock()  argument
238 	: "r" (token), "r" (&rw->lock)  in __arch_write_trylock()
244 static inline void arch_read_lock(arch_rwlock_t *rw)  in arch_read_lock()  argument
247 		if (likely(__arch_read_trylock(rw) > 0))  in arch_read_lock()
252 				__rw_yield(rw);  in arch_read_lock()
253 		} while (unlikely(rw->lock < 0));  in arch_read_lock()
258 static inline void arch_write_lock(arch_rwlock_t *rw)  in arch_write_lock()  argument
261 		if (likely(__arch_write_trylock(rw) == 0))  in arch_write_lock()
266 				__rw_yield(rw);  in arch_write_lock()
267 		} while (unlikely(rw->lock != 0));  in arch_write_lock()
272 static inline int arch_read_trylock(arch_rwlock_t *rw)  in arch_read_trylock()  argument
274 	return __arch_read_trylock(rw) > 0;  in arch_read_trylock()
277 static inline int arch_write_trylock(arch_rwlock_t *rw)  in arch_write_trylock()  argument
279 	return __arch_write_trylock(rw) == 0;  in arch_write_trylock()
282 static inline void arch_read_unlock(arch_rwlock_t *rw)  in arch_read_unlock()  argument
295 	: "r"(&rw->lock)  in arch_read_unlock()
299 static inline void arch_write_unlock(arch_rwlock_t *rw)  in arch_write_unlock()  argument
303 	rw->lock = 0;  in arch_write_unlock()