vdo_drain_block_map
void vdo_drain_block_map(struct block_map *map, const struct admin_state_code *operation,
vdo_drain_block_map(vdo->block_map, vdo_get_admin_state_code(state),
vdo_drain_block_map(completion->vdo->block_map, VDO_ADMIN_STATE_RECOVERING,
vdo_drain_block_map(completion->vdo->block_map, operation, completion);