From: Vivek Goyal Subject: Re: [PATCH 09/23] cgroup: add subsys backlink pointer to cftype Date: Mon, 5 Aug 2013 08:49:51 -0400 Message-ID: <20130805124951.GB2274@redhat.com> References: <1375393801-4817-1-git-send-email-tj@kernel.org> <1375393801-4817-10-git-send-email-tj@kernel.org> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <1375393801-4817-10-git-send-email-tj@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Tejun Heo Cc: lizefan@huawei.com, containers@lists.linux-foundation.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org, Jens Axboe On Thu, Aug 01, 2013 at 05:49:47PM -0400, Tejun Heo wrote: > cgroup is transitioning to using css (cgroup_subsys_state) instead of > cgroup as the primary subsystem handle. The cgroupfs file interface > will be converted to use css's which requires finding out the > subsystem from cftype so that the matching css can be determined from > the cgroup. > > This patch adds cftype->ss which points to the subsystem the file > belongs to. The field is initialized while a cftype is being > registered. This makes it unnecessary to explicitly specify the > subsystem for other cftype handling functions. @ss argument dropped > from various cftype handling functions. > > This patch shouldn't introduce any behavior differences. > > Signed-off-by: Tejun Heo > Cc: Vivek Goyal > Cc: Jens Axboe > --- > block/blk-cgroup.c | 2 +- blk-cgroup bits are simple here. Ack for these. Acked-by: Vivek Goyal Vivek