drbd_set_ed_uuid
drbd_set_ed_uuid(device, val);
drbd_set_ed_uuid(device, val);
updated_uuids = drbd_set_ed_uuid(device, p_uuid[UI_CURRENT]);
updated_uuids |= drbd_set_ed_uuid(device, p_uuid[UI_CURRENT]);
drbd_set_ed_uuid(device, device->ldev->md.uuid[UI_CURRENT]);