kernfs_rename_ns
ret = kernfs_rename_ns(kobj->sd, parent, new_name, new_ns);
return kernfs_rename_ns(kn, new_parent, NULL, new_ns);
result = kernfs_rename_ns(kn, parent, new, new_ns);
int kernfs_rename_ns(struct kernfs_node *kn, struct kernfs_node *new_parent,
return kernfs_rename_ns(kn, new_parent, new_name, NULL);