linux-kernel - Re: [PATCH v2] kbuild: Enable -Wtautological-compare

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Message-ID: <CAK7LNASPt4c-Vt9UzdKjSvPSYqXd4AFLNqKXfxnmqmfzk3Zi_A@mail.gmail.com>
Date:   Fri, 3 Apr 2020 02:05:50 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>
Subject: Re: [PATCH v2] kbuild: Enable -Wtautological-compare

On Wed, Apr 1, 2020 at 4:26 AM Nathan Chancellor
<natechancellor@...il.com> wrote:
>
> On Tue, Mar 31, 2020 at 09:02:19AM -0700, 'Nick Desaulniers' via Clang Built Linux wrote:
> > On Tue, Mar 31, 2020 at 3:11 AM Nathan Chancellor
> > <natechancellor@...il.com> wrote:
> > > Just a follow up, those two patches have been picked up and should be in
> > > this coming release:
> > >
> > > https://git.kernel.org/balbi/usb/c/58582220d2d34228e5a1e1585e41b735713988bb
> > > https://git.kernel.org/rostedt/linux-trace/c/bf2cbe044da275021b2de5917240411a19e5c50d
> > >
> > > As of next-20200331, with the former applied (because it is not there
> > > yet) along with this patch, I see no warnings on arm, arm64, x86_64
> > > all{mod,yes}config.
> >
> > kbuild test robot is testing more arch's than that with Clang so it
> > may report if it finds more instances of that warning in those.
> >
> > --
> > Thanks,
> > ~Nick Desaulniers
> >
>
> I'll keep an eye out. Hopefully not too many more are lurking but we
> have definitely caught some bad behavior with this warning already so
> getting it turned on so that all CI systems can benefit from it is
> important.
>
> Cheers,
> Nathan



Applied to linux-kbuild.

I will rebase my branch during this MW,
so the commit ID will be unstable.
Please do not record it until it lands in Linus' tree.

-- 
Best Regards
Masahiro Yamada