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: <20200124082637.GZ14914@hirez.programming.kicks-ass.net>
Date:   Fri, 24 Jan 2020 09:26:37 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
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 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.