linux-kernel - Re: [PATCH] ARM: xor-neon: Replace __GNUC__ checks with CONFIG_CC_IS

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Message-ID: <CAK8P3a2pYp6aaOSrtHKbVW+hPbwgj1An6dWNd-YLJyR5otvU-A@mail.gmail.com>
Date:   Fri, 31 May 2019 23:03:19 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Nathan Chancellor <natechancellor@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Nicolas Pitre <nico@...xnic.net>,
        Stefan Agner <stefan@...er.ch>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: [PATCH] ARM: xor-neon: Replace __GNUC__ checks with CONFIG_CC_IS_GCC

On Fri, May 31, 2019 at 10:06 PM 'Nick Desaulniers' via Clang Built
Linux <clang-built-linux@...glegroups.com> wrote:
>
> On Fri, May 31, 2019 at 12:21 PM Arnd Bergmann <arnd@...db.de> wrote:
> > clang, I would suggest dropping your patch then, and instead adding
>
> I disagree.  The minimum version of gcc required to build the kernel
> is 4.6, so the comment about older versions of gcc is irrelevant and
> should be removed.

Sure, that's ok. It just feels wrong to remove a warning that points
to a real problem that still exists and can be detected at the moment.

If we think that clang-9 is going to be fixed before its release,
the warning could be changed to test for that version as a minimum,
and point to the bugzilla entry for more details.

      Arnd