linux-kernel - Re: [PATCH v2 09/10] compiler/gcc: Raise minimum GCC version for kernel builds to 4.8

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Message-ID: <CAKwvOdmFMnCgr3rP5vNkj_H1SnBJ6drdBP1RSGxzfYzSiWGfLg@mail.gmail.com>
Date:   Fri, 24 Jan 2020 09:05:27 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Will Deacon <will@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        kernel-team <kernel-team@...roid.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Segher Boessenkool <segher@...nel.crashing.org>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Peter Oberparleiter <oberpar@...ux.ibm.com>,
        Masahiro Yamada <masahiroy@...nel.org>
Subject: Re: [PATCH v2 09/10] compiler/gcc: Raise minimum GCC version for
 kernel builds to 4.8

On Fri, Jan 24, 2020 at 12:26 AM Peter Zijlstra <peterz@...radead.org> wrote:
>
> On Thu, Jan 23, 2020 at 10:36:37AM -0800, Nick Desaulniers wrote:
> > On Thu, Jan 23, 2020 at 7:34 AM Will Deacon <will@...nel.org> wrote:
> > >
> > > It is very rare to see versions of GCC prior to 4.8 being used to build
> > > the mainline kernel. These old compilers are also know to have codegen
> > > issues which can lead to silent miscompilation:
> > >
> > > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58145
> > >
> > > Raise the minimum GCC version for kernel build to 4.8 and remove some
> > > tautological Kconfig dependencies as a consequence.
> > >
> > > Cc: Nick Desaulniers <ndesaulniers@...gle.com>
> >
> > Thanks for the patch.
> > Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>
> > I wouldn't mind if this patch preceded the earlier one in the series
> > adding the warning, should the series require a v2 and if folks are
> > generally ok with bumping the min version.
>
> If I hadn't actually read your reply, I would have never spotted that
> reviewed-by tag, hidden in a blob of text like that.
>
> Adding some whitespace before and after, such that it stands out a
> little more, might avoid such issues.

Ack. Do maintainers have tools for fetching patch series and
automating collecting Reviewed-by tags, or is it all extremely manual?

-- 
Thanks,
~Nick Desaulniers