zfs_btree_add
zfs_btree_add(bt, &i);
zfs_btree_add(bt, &i);
zfs_btree_add(size_tree, rs);
zfs_btree_add(&rt->rt_root, &newseg);
zfs_btree_add(size_tree, rs);
void zfs_btree_add(zfs_btree_t *, const void *);