From: Jens Axboe <axboe@kernel.dk>
To: Christoph Hellwig <hch@lst.de>
Cc: Tejun Heo <tj@kernel.org>,
dm-devel@redhat.com, cgroups@vger.kernel.org,
linux-block@vger.kernel.org, drbd-dev@lists.linbit.com,
linux-bcache@vger.kernel.org, linux-raid@vger.kernel.org,
linux-btrfs@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: remove dead bdi congestion leftovers
Date: Thu, 9 Jul 2020 07:58:58 -0600 [thread overview]
Message-ID: <82e2785d-2091-1986-0014-3b7cea7cd0d8@kernel.dk> (raw)
In-Reply-To: <20200709053233.GA3243@lst.de>
On 7/8/20 11:32 PM, Christoph Hellwig wrote:
> On Wed, Jul 08, 2020 at 05:14:29PM -0600, Jens Axboe wrote:
>> On 7/1/20 3:06 AM, Christoph Hellwig wrote:
>>> Hi Jens,
>>>
>>> we have a lot of bdi congestion related code that is left around without
>>> any use. This series removes it in preparation of sorting out the bdi
>>> lifetime rules properly.
>>
>> Please run series like this through a full compilation, for both this one
>> and the previous series I had to fix up issues like this:
>>
>> drivers/md/bcache/request.c: In function ‘bch_cached_dev_request_init’:
>> drivers/md/bcache/request.c:1233:18: warning: unused variable ‘g’ [-Wunused-variable]
>> 1233 | struct gendisk *g = dc->disk.disk;
>> | ^
>> drivers/md/bcache/request.c: In function ‘bch_flash_dev_request_init’:
>> drivers/md/bcache/request.c:1320:18: warning: unused variable ‘g’ [-Wunused-variable]
>> 1320 | struct gendisk *g = d->disk;
>> | ^
>>
>> Did the same here, applied it.
>
> And just like the previous one I did, and the compiler did not complain.
> There must be something about certain gcc versions not warning about
> variables that are initialized but not otherwise used.
Are you using gcc-10? It sucks for that. gcc-9 seems to reliably hit
these cases for me, not sure why gcc-10 doesn't. And the ones quoted
above are about as trivial as they can get.
--
Jens Axboe
next prev parent reply other threads:[~2020-07-09 13:59 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-01 9:06 remove dead bdi congestion leftovers Christoph Hellwig
2020-07-01 9:06 ` [PATCH 1/4] drbd: remove a bogus bdi_rw_congested call Christoph Hellwig
2020-07-01 9:06 ` [PATCH 2/4] writeback: remove {set,clear}_wb_congested Christoph Hellwig
2020-07-01 9:06 ` [PATCH 3/4] writeback: remove struct bdi_writeback_congested Christoph Hellwig
2020-07-01 9:06 ` [PATCH 4/4] writeback: remove bdi->congested_fn Christoph Hellwig
2020-07-01 14:48 ` David Sterba
2020-07-02 0:38 ` Coly Li
2020-07-02 5:36 ` Song Liu
2020-07-01 16:38 ` remove dead bdi congestion leftovers Tejun Heo
2020-07-01 16:41 ` Mike Snitzer
2020-07-01 17:57 ` Matthew Wilcox
2020-07-01 18:25 ` Matthew Wilcox
2020-07-08 23:14 ` Jens Axboe
2020-07-09 5:32 ` Christoph Hellwig
2020-07-09 13:58 ` Jens Axboe [this message]
2020-07-09 14:01 ` Christoph Hellwig
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