linux-kernel - Re: [PATCH 32/34] ASoC: remove incorrect of_match_ptr/ACPI

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Date: Wed, 3 Apr 2024 12:15:13 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Arnd Bergmann <arnd@...nel.org>
Cc: linux-kernel@...r.kernel.org, Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>, Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Claudiu Beznea <claudiu.beznea@...on.dev>,
	Nicolas Ferre <nicolas.ferre@...rochip.com>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>,
	Oder Chiou <oder_chiou@...ltek.com>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	Banajit Goswami <bgoswami@...cinc.com>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>,
	Arnd Bergmann <arnd@...db.de>,
	Alper Nebi Yasak <alpernebiyasak@...il.com>,
	Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
	Akihiko Odaki <akihiko.odaki@...nix.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Yinchuan Guo <guoych37@...l2.sysu.edu.cn>,
	Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
	Rob Herring <robh@...nel.org>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	linux-sound@...r.kernel.org, alsa-devel@...a-project.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 32/34] ASoC: remove incorrect of_match_ptr/ACPI_PTR
 annotations

On Wed, Apr 03, 2024 at 10:06:50AM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> When building with CONFIG_OF and/or CONFIG_ACPI disabled but W=1 extra
> warnings enabled, a lot of driver cause a warning about an unused
> ID table:
> 
> sound/soc/atmel/sam9x5_wm8731.c:187:34: error: unused variable 'sam9x5_wm8731_of_match' [-Werror,-Wunused-const-variable]
> sound/soc/codecs/rt5514-spi.c:496:34: error: unused variable 'rt5514_of_match' [-Werror,-Wunused-const-variable]
> sound/soc/samsung/aries_wm8994.c:524:34: error: unused variable 'samsung_wm8994_of_match' [-Werror,-Wunused-const-variable]
> 
> The fix is always to just remove the of_match_ptr() and ACPI_PTR() wrappers
> that remove the reference, rather than adding another #ifdef just for build
> testing for a configuration that doesn't matter in practice.

..

> index d6cdb6d9fdd6..ffc105759994 100644
> --- a/sound/soc/amd/acp3x-rt5682-max9836.c
> +++ b/sound/soc/amd/acp3x-rt5682-max9836.c
> @@ -543,7 +543,7 @@ MODULE_DEVICE_TABLE(acpi, acp3x_audio_acpi_match);
>  static struct platform_driver acp3x_audio = {
>  	.driver = {
>  		.name = "acp3x-alc5682-max98357",
> -		.acpi_match_table = ACPI_PTR(acp3x_audio_acpi_match),
> +		.acpi_match_table = acp3x_audio_acpi_match,
>  		.pm = &snd_soc_pm_ops,
>  	},
>  	.probe = acp3x_probe,

Replace acpi_match_device() by device_get_match_data() and acpi.h by
mod_devicetable.h + property.h.

I really would like to see agnostic drivers (when they don't need of*.h/acpi.h
to be included as "proxy" headers).

With this, the change probably needs to be separated from this patch.

If you address as suggested,
Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

..

The rest I haven't checked, it might be possible to do something similar there
as well.

-- 
With Best Regards,
Andy Shevchenko