linux-kernel - Re: [PATCH 02/14] drbd: remove dead code in device_to

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Date:   Wed, 22 Jul 2020 07:03:21 +0000
From:   Johannes Thumshirn <Johannes.Thumshirn@....com>
To:     Christoph Hellwig <hch@....de>, Jens Axboe <axboe@...nel.dk>
CC:     Song Liu <song@...nel.org>, Hans de Goede <hdegoede@...hat.com>,
        Richard Weinberger <richard@....at>,
        Minchan Kim <minchan@...nel.org>,
        "linux-mtd@...ts.infradead.org" <linux-mtd@...ts.infradead.org>,
        "dm-devel@...hat.com" <dm-devel@...hat.com>,
        "linux-block@...r.kernel.org" <linux-block@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "drbd-dev@...ts.linbit.com" <drbd-dev@...ts.linbit.com>,
        "linux-raid@...r.kernel.org" <linux-raid@...r.kernel.org>,
        "linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "cgroups@...r.kernel.org" <cgroups@...r.kernel.org>
Subject: Re: [PATCH 02/14] drbd: remove dead code in device_to_statistics

On 22/07/2020 08:28, Christoph Hellwig wrote:
> Ever since the switch to blk-mq, a lower device not use by VM
                                           in-use/used? ~^

Also this looks like the last user of 'dev_lower_blocked' so it could
be removed from device_statistics if it's not an ABI (not sure with this
netlink stuff).