O2HB_NODE_DOWN_CB
o2hb_queue_node_event(&event, O2HB_NODE_DOWN_CB,
BUG_ON((!node) && (type != O2HB_NODE_DOWN_CB));
o2hb_queue_node_event(&event, O2HB_NODE_DOWN_CB, node,
o2hb_setup_callback(&o2net_hb_down, O2HB_NODE_DOWN_CB,
o2hb_setup_callback(&dlm->dlm_hb_down, O2HB_NODE_DOWN_CB,