| Date | Mon, 8 Apr 2013 08:43:19 -0700 | From | Tejun Heo <> | Subject | Re: [PATCH 2/8] cgroup: implement cgroup_from_id() |
| |
On Mon, Apr 08, 2013 at 04:20:59PM +0800, Li Zefan wrote: > +/** > + * cgroup_from_id - lookup cgroup by id > + * @ss: cgroup subsys to be looked into. > + * @id: the id > + * > + * Returns pointer to cgroup if there is valid one with id. > + * NULL if not. Should be called under rcu_read_lock() > + */ > +struct cgroup *cgroup_from_id(struct cgroup_subsys *ss, int id) > +{
rcu_lockdep_assert(rcu_read_lock_held(), ...);
> + return idr_find(&ss->root->cgroup_idr, id);
Thanks.
-- tejun
|