drbd_free_peer_reqs
extern int drbd_free_peer_reqs(struct drbd_device *, struct list_head *);
rr = drbd_free_peer_reqs(device, &device->active_ee);
rr = drbd_free_peer_reqs(device, &device->sync_ee);
rr = drbd_free_peer_reqs(device, &device->read_ee);
rr = drbd_free_peer_reqs(device, &device->done_ee);