linux-kernel - Re: [PATCH 10/15] blkcg: remove bio->bi_css and instead use bio->bi

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Message-ID: <20180901001305.GH1488037@devbig004.ftw2.facebook.com>
Date:   Fri, 31 Aug 2018 17:13:05 -0700
From:   Tejun Heo <tj@...nel.org>
To:     Dennis Zhou <dennisszhou@...il.com>
Cc:     Jens Axboe <axboe@...nel.dk>, Johannes Weiner <hannes@...xchg.org>,
        Josef Bacik <josef@...icpanda.com>, kernel-team@...com,
        linux-block@...r.kernel.org, cgroups@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 10/15] blkcg: remove bio->bi_css and instead use
 bio->bi_blkg

On Thu, Aug 30, 2018 at 09:53:51PM -0400, Dennis Zhou wrote:
> From: "Dennis Zhou (Facebook)" <dennisszhou@...il.com>
> 
> Prior patches ensured that all bios are now associated with some blkg.
> This now makes bio->bi_css unnecessary as blkg maintains a reference to
> the blkcg already.
> 
> This patch removes the field bi_css and transfers corresponding uses to
> access via bi_blkg.
> 
> Signed-off-by: Dennis Zhou <dennisszhou@...il.com>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks.

-- 
tejun