Re: [PATCH 09/23] cgroup: add subsys backlink pointer to cftype

From: Vivek Goyal
Date: Mon Aug 05 2013 - 08:50:03 EST

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 <tj@xxxxxxxxxx>
> Cc: Vivek Goyal <vgoyal@xxxxxxxxxx>
> Cc: Jens Axboe <axboe@xxxxxxxxx>
> ---
> block/blk-cgroup.c | 2 +-

blk-cgroup bits are simple here. Ack for these.

Acked-by: Vivek Goyal <vgoyal@xxxxxxxxxx>

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