rwlock_acquire_read
rwlock_acquire_read(&lock->dep_map, 0, 1, _RET_IP_);
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
rwlock_acquire_read(&rwlock->dep_map, 0, 1, _RET_IP_);
rwlock_acquire_read(&rwlock->dep_map, 0, 0, _RET_IP_);