linux-kernel - Re: [PATCH 18/20] media: mtk-mdp: address a clang warning

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Date:   Wed, 24 Nov 2021 20:21:50 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     Linuxarm <linuxarm@...wei.com>,
        Mauro Carvalho Chehab <mauro.chehab@...wei.com>,
        Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Houlong Wei <houlong.wei@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Minghsiu Tsai <minghsiu.tsai@...iatek.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        "moderated list:ARM/Mediatek SoC..." 
        <linux-mediatek@...ts.infradead.org>, llvm@...ts.linux.dev
Subject: Re: [PATCH 18/20] media: mtk-mdp: address a clang warning

On Wed, Nov 24, 2021 at 8:13 PM Mauro Carvalho Chehab
<mchehab+huawei@...nel.org> wrote:
>
> The typecasts at the dvb-core generate clang warnings when W=1
> is enabled.
>
> Such warning is harmless, but it causes the build to break with
> CONFIG_WERROR and W=1 with clang, so do the cast on a way that
> it won't produce warnings anymore.
>
> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>

Reviewed-by: Arnd Bergmann <arnd@...db.de>

>
> -               comp_type = (enum mtk_mdp_comp_type)of_id->data;
> +               comp_type = (long)of_id->data;

I would generally use (uintptr_t) for this purpose, but the effect is the same.

        Arnd