chfs_remove_frags_of_node
void chfs_remove_frags_of_node(struct chfs_mount *, struct rb_tree *,
chfs_remove_frags_of_node(chmp, &ip->fragtree, fn->nref);
chfs_remove_frags_of_node(chmp, &ip->fragtree, fd->nref);
chfs_remove_frags_of_node(chmp, &ip->fragtree, nref);