5 int init_rwsem(struct rw_semaphore *sem)  in init_rwsem()  argument
7 	return pthread_rwlock_init(&sem->lock, NULL);  in init_rwsem()
10 int exit_rwsem(struct rw_semaphore *sem)  in exit_rwsem()  argument
12 	return pthread_rwlock_destroy(&sem->lock);  in exit_rwsem()
15 int down_read(struct rw_semaphore *sem)  in down_read()  argument
17 	return perf_singlethreaded ? 0 : pthread_rwlock_rdlock(&sem->lock);  in down_read()
20 int up_read(struct rw_semaphore *sem)  in up_read()  argument
22 	return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock);  in up_read()
25 int down_write(struct rw_semaphore *sem)  in down_write()  argument
27 	return perf_singlethreaded ? 0 : pthread_rwlock_wrlock(&sem->lock);  in down_write()
30 int up_write(struct rw_semaphore *sem)  in up_write()  argument
32 	return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock);  in up_write()