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Message-ID: <20230809154245.GB832145@dev-arch.thelio-3990X>
Date:   Wed, 9 Aug 2023 08:42:45 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        kernel test robot <lkp@...el.com>,
        Nicolas Schier <nicolas@...sle.eu>, Tom Rix <trix@...hat.com>,
        llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        Arnd Bergmann <arnd@...nel.org>
Subject: Re: [PATCH v2] Makefile.extrawarn: enable
 -Wmissing-variable-declarations for W=1

On Tue, Aug 08, 2023 at 09:17:07AM -0700, Nathan Chancellor wrote:
> I think the register storage issue should be resolved in at least clang
> before this patch is accepted, as that seems to be where the majority of
> warnings are coming from so far. Like we talked about, I'll take a shot
> at fixing that. Once that is fixed, I'll build mainline with
> -Wmissing-variable-declarations to see how many instances there are and
> if there are any other interesting edge cases that should be fixed in
> the compiler. After that, I think this should be good to go in. Does
> that sound reasonable?

I don't think there are any other edge cases from the brief glance I
gave my build logs but my matrix counts 700+ unique instances of this
(give or take some, due to interleaving issues). Quite a few but I see
several in certain files so it might not actually be too bad.

Cheers,
Nathan

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