Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936852Ab3DIDNG (ORCPT ); Mon, 8 Apr 2013 23:13:06 -0400 Received: from szxga01-in.huawei.com ([119.145.14.64]:34386 "EHLO szxga01-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934544Ab3DIDND (ORCPT ); Mon, 8 Apr 2013 23:13:03 -0400 Message-ID: <51638709.207@huawei.com> Date: Tue, 9 Apr 2013 11:12:09 +0800 From: Li Zefan User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/20130328 Thunderbird/17.0.5 MIME-Version: 1.0 To: Tejun Heo CC: Andrew Morton , Glauber Costa , KAMEZAWA Hiroyuki , Michal Hocko , Johannes Weiner , LKML , Cgroups , Subject: Re: [PATCH 2/8] cgroup: implement cgroup_from_id() References: <51627DA9.7020507@huawei.com> <51627DEB.4090104@huawei.com> <20130408154319.GD3021@htj.dyndns.org> In-Reply-To: <20130408154319.GD3021@htj.dyndns.org> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.135.68.215] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 790 Lines: 26 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); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/