4 int init_rwsem(struct rw_semaphore *sem)  in init_rwsem()  argument
6 	return pthread_rwlock_init(&sem->lock, NULL);  in init_rwsem()
9 int exit_rwsem(struct rw_semaphore *sem)  in exit_rwsem()  argument
11 	return pthread_rwlock_destroy(&sem->lock);  in exit_rwsem()
14 int down_read(struct rw_semaphore *sem)  in down_read()  argument
16 	return perf_singlethreaded ? 0 : pthread_rwlock_rdlock(&sem->lock);  in down_read()
19 int up_read(struct rw_semaphore *sem)  in up_read()  argument
21 	return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock);  in up_read()
24 int down_write(struct rw_semaphore *sem)  in down_write()  argument
26 	return perf_singlethreaded ? 0 : pthread_rwlock_wrlock(&sem->lock);  in down_write()
29 int up_write(struct rw_semaphore *sem)  in up_write()  argument
31 	return perf_singlethreaded ? 0 : pthread_rwlock_unlock(&sem->lock);  in up_write()