drbd_alloc_peer_req
peer_req = drbd_alloc_peer_req(peer_device, id, sector, ds, data_size, GFP_NOIO);
peer_req = drbd_alloc_peer_req(peer_device, p->block_id, sector, size,
peer_req = drbd_alloc_peer_req(peer_device, ID_SYNCER, sector,
peer_req = drbd_alloc_peer_req(peer_device, ID_SYNCER /* unused */, sector,