linux-kernel - Re: dm-bufio: avoid false-positive Wmaybe-uninitialized warning

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Message-ID: <CAK8P3a3fnHYRSZ8X5G7fd5oVORM3fm7PLcuuPytkR9VQWHJygg@mail.gmail.com>
Date:   Wed, 7 Mar 2018 09:48:05 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Mike Snitzer <snitzer@...hat.com>
Cc:     Alasdair Kergon <agk@...hat.com>, dm-devel@...hat.com,
        Mikulas Patocka <mpatocka@...hat.com>,
        Ingo Molnar <mingo@...nel.org>,
        Aliaksei Karaliou <akaraliou.dev@...il.com>,
        Jens Axboe <axboe@...nel.dk>, Jan Kara <jack@...e.cz>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        Mark Rutland <mark.rutland@....com>,
        Eric Biggers <ebiggers@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        stable <stable@...r.kernel.org>
Subject: Re: dm-bufio: avoid false-positive Wmaybe-uninitialized warning

On Wed, Mar 7, 2018 at 2:29 AM, Mike Snitzer <snitzer@...hat.com> wrote:
> On Tue, Mar 06 2018 at  4:33pm -0500,
> Arnd Bergmann <arnd@...db.de> wrote:
>
>> On Thu, Feb 22, 2018 at 5:04 PM, Mike Snitzer <snitzer@...hat.com> wrote:
>> > On Thu, Feb 22 2018 at 10:56am -0500,
>> > Arnd Bergmann <arnd@...db.de> wrote:
>>
>> >
>> > Mikulas already sent a fix for this:
>> > https://patchwork.kernel.org/patch/10211631/
>> >
>> > But I like yours a bit better, though I'll likely move the declaration
>> > of 'noio_flag' temporary inside the conditional.
>> >
>> > Anyway, I'll get this fixed up shortly, thanks.
>>
>> I see the fix made it into linux-next on the same day, but the build bots still
>> report the warning for mainline kernels and now also for stable kernels
>> that got a backport of the patch that introduced it on arm64.
>>
>> I assume you had not planned to send it for mainline, any chance you
>> could change that and send it as a bugfix with a 'Cc:
>> stable@...r.kernel.org' tag to restore a clean build?
>
> I did/do plan to send to Linus this week.
>
> But I've updated the commit header to include the CC: stable like you
> asked.

Got it, thanks a lot, that brings us down to two kernelci warnings for 4.16
and one for 4.15-stable then.

      Arnd