nilfs_btree_node_size
ncmin = NILFS_BTREE_NODE_NCHILDREN_MIN(nilfs_btree_node_size(btree));
nilfs_btree_node_size(btree))) {
NILFS_BTREE_NODE_NCHILDREN_MAX(nilfs_btree_node_size(bmap));
NILFS_BTREE_NODE_NCHILDREN_MAX(nilfs_btree_node_size(bmap));