to_cg_ns
return current_in_namespace(to_cg_ns(ns));
if (!current_in_namespace(to_cg_ns(ns)))
owning_ns = to_cg_ns(ns)->user_ns;
put_cgroup_ns(to_cg_ns(ns));
return to_cg_ns(ns)->user_ns;
struct cgroup_namespace *cgroup_ns = to_cg_ns(ns);