release_slot
release_slot(info, blkn);
release_slot(info, after);
release_slot(info, blk);
release_slot(info, blk);
release_slot(slot);
release_slot(slot);
release_slot(state, state->rx_info, NULL, NULL);
release_slot(state, slot_info, header, NULL);
release_slot(state, slot_info, header, service);