i_lfs_lbtree
if (SPLAY_INSERT(lfs_splay, &ip->i_lfs_lbtree, lbp) != NULL) {
SPLAY_REMOVE(lfs_splay, &ip->i_lfs_lbtree, lbp);
if ((lbp = SPLAY_FIND(lfs_splay, &ip->i_lfs_lbtree, &tmp)) != NULL)
hd = &ip->i_lfs_lbtree;
SPLAY_INIT(&ip->i_lfs_lbtree);