From mboxrd@z Thu Jan  1 00:00:00 1970
From: Borislav Petkov <bp@alien8.de>
Subject: Re: [PATCH 6/7] md/raid10, LLVM: get rid of variable length array
Date: Fri, 17 Mar 2017 19:57:20 +0100
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Cc: Alexander Potapenko <glider@google.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Michael Davidson <md@google.com>,
        Michal Marek <mmarek@suse.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        "David S. Miller" <davem@davemloft.net>,
        Shaohua Li <shli@kernel.org>,
        Matthias Kaehlcke <mka@chromium.org>,
        "x86@kernel.org" <x86@kernel.org>,
        "open list:KERNEL BUILD + fi..." <linux-kbuild@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        linux-crypto@vger.kernel.org, linux-raid@vger.kernel.org,
        kbuild-all@01.org
To: Dmitry Vyukov <dvyukov@google.com>
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On Fri, Mar 17, 2017 at 07:47:33PM +0100, Dmitry Vyukov wrote:
> This problem is more general and is not specific to clang. It equally
> applies to different versions of gcc, different arches and different
> configs (namely, anything else than what a developer used for
> testing).

I guess. We do carry a bunch of gcc workarounds along with the cc-*
macros in scripts/Kbuild.include.

> A known, reasonably well working solution to this problem is
> a system of try bots that test patches before commit with different
> compilers/configs/archs. We already have such system in the form of
> 0-day bots. It would be useful to extend it with clang as soon as
> kernel builds.

Has someone actually already talked to Fengguang about it?

Oh, and the stupid question: why the effort to build the kernel
with clang at all? Just because or are there some actual, palpable
advantages?

-- 
Regards/Gruss,
    Boris.

Good mailing practices for 400: avoid top-posting and trim the reply.