linux-kernel - Re: [PATCH -next] sound/oss/dmasound: fix 'dmasound

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Date:   Thu, 14 Apr 2022 13:54:27 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Miles Chen <miles.chen@...iatek.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH -next] sound/oss/dmasound: fix 'dmasound_setup' defined
 but not used

Il 14/04/22 10:11, Miles Chen ha scritto:
> We observed: 'dmasound_setup' defined but not used error with
> COMPILER=gcc ARCH=m68k DEFCONFIG=allmodconfig build.
> 
> __setup() does not work if MODULE is defined.
> Fix it by warpping dmasound_setup with #ifndef MODULES.
> 
> Error(s):
> sound/oss/dmasound/dmasound_core.c:1431:12: error: 'dmasound_setup' defined but not used [-Werror=unused-function]
> 
> Signed-off-by: Miles Chen <miles.chen@...iatek.com>
> ---
>   sound/oss/dmasound/dmasound_core.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/sound/oss/dmasound/dmasound_core.c b/sound/oss/dmasound/dmasound_core.c
> index 9c48f3a9e3d1..a1b3e71beadf 100644
> --- a/sound/oss/dmasound/dmasound_core.c
> +++ b/sound/oss/dmasound/dmasound_core.c
> @@ -1428,6 +1428,7 @@ void dmasound_deinit(void)
>   		unregister_sound_dsp(sq_unit);
>   }
>   
> +#ifndef MODULE
>   static int dmasound_setup(char *str)

Hello Miles,
I agree with Takashi, __maybe_unused looks way better.

Regards,
Angelo