Messages in this thread | | | Date | Tue, 9 Apr 2013 11:12:09 +0800 | From | Li Zefan <> | Subject | Re: [PATCH 2/8] cgroup: implement cgroup_from_id() |
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On 2013/4/8 23:43, Tejun Heo wrote: > 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(), .. .);
will update
> >> + return idr_find(&ss->root->cgroup_idr, id);
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