linux-kernel - Re: [PATCH] ASoC: loongson: make loongson-i2s.o a separate module

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Message-ID: <52c7e318.434f.192941d2bee.Coremail.zhoubinbin@loongson.cn>
Date: Wed, 16 Oct 2024 14:56:32 +0800 (GMT+08:00)
From: 周彬彬 <zhoubinbin@...ngson.cn>
To: "Arnd Bergmann" <arnd@...nel.org>
Cc: "Liam Girdwood" <lgirdwood@...il.com>, "Mark Brown" <broonie@...nel.org>,
	"Jaroslav Kysela" <perex@...ex.cz>, "Takashi Iwai" <tiwai@...e.com>,
	"Arnd Bergmann" <arnd@...db.de>,
	tangbin <tangbin@...s.chinamobile.com>, linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org, zhoubb.aaron@...il.com
Subject: Re: [PATCH] ASoC: loongson: make loongson-i2s.o a separate module

Hi Arnd:

Thanks for your patch.

> -----Original Messages-----
> From: "Arnd Bergmann" <arnd@...nel.org>
> Send time:Tuesday, 10/15/2024 23:09:54
> To: "Liam Girdwood" <lgirdwood@...il.com>, "Mark Brown" <broonie@...nel.org>, "Jaroslav Kysela" <perex@...ex.cz>, "Takashi Iwai" <tiwai@...e.com>, "Binbin Zhou" <zhoubinbin@...ngson.cn>
> Cc: "Arnd Bergmann" <arnd@...db.de>, tangbin <tangbin@...s.chinamobile.com>, linux-sound@...r.kernel.org, linux-kernel@...r.kernel.org
> Subject: [PATCH] ASoC: loongson: make loongson-i2s.o a separate module
> 
> From: Arnd Bergmann <arnd@...db.de>
> 
> An object file should not be linked into multiple modules and/or
> vmlinux:
> 
> scripts/Makefile.build:221: /home/arnd/arm-soc/sound/soc/loongson/Makefile: loongson_i2s.o is added to multiple modules: snd-soc-loongson-i2s-pci snd-soc-loongson-i2s-plat

I would like to ask for some advice.
I didn't notice this warning before when I submitted the patch, is there some specific compilation option that needs to be turned on?

#
# SoC Audio for Loongson CPUs
#
CONFIG_SND_SOC_LOONGSON_CARD=m
CONFIG_SND_SOC_LOONGSON_I2S_PCI=m
CONFIG_SND_SOC_LOONGSON_I2S_PLATFORM=m
# end of SoC Audio for Loongson CPUs

Thanks.
Binbin
> 
> Change this one to make it a library module with two exported symbols
> that will work in any configuration.
> 
> Fixes: ba4c5fad598c ("ASoC: loongson: Add I2S controller driver as platform device")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>  sound/soc/loongson/Makefile       | 10 ++++++----
>  sound/soc/loongson/loongson_i2s.c |  5 +++++
>  2 files changed, 11 insertions(+), 4 deletions(-)
> 
> diff --git a/sound/soc/loongson/Makefile b/sound/soc/loongson/Makefile
> index f396259244a3..c0cb1acb36e3 100644
> --- a/sound/soc/loongson/Makefile
> +++ b/sound/soc/loongson/Makefile
> @@ -1,10 +1,12 @@
>  # SPDX-License-Identifier: GPL-2.0
>  #Platform Support
> -snd-soc-loongson-i2s-pci-y := loongson_i2s_pci.o loongson_i2s.o loongson_dma.o
> -obj-$(CONFIG_SND_SOC_LOONGSON_I2S_PCI) += snd-soc-loongson-i2s-pci.o
> +snd-soc-loongson-i2s-pci-y := loongson_i2s_pci.o loongson_dma.o
> +obj-$(CONFIG_SND_SOC_LOONGSON_I2S_PCI) += snd-soc-loongson-i2s-pci.o snd-soc-loongson-i2s.o
>  
> -snd-soc-loongson-i2s-plat-y := loongson_i2s_plat.o loongson_i2s.o
> -obj-$(CONFIG_SND_SOC_LOONGSON_I2S_PLATFORM) += snd-soc-loongson-i2s-plat.o
> +snd-soc-loongson-i2s-plat-y := loongson_i2s_plat.o
> +obj-$(CONFIG_SND_SOC_LOONGSON_I2S_PLATFORM) += snd-soc-loongson-i2s-plat.o snd-soc-loongson-i2s.o
> +
> +snd-soc-loongson-i2s-y := loongson_i2s.o
>  
>  #Machine Support
>  snd-soc-loongson-card-y := loongson_card.o
> diff --git a/sound/soc/loongson/loongson_i2s.c b/sound/soc/loongson/loongson_i2s.c
> index 40bbf3205391..e8852a30f213 100644
> --- a/sound/soc/loongson/loongson_i2s.c
> +++ b/sound/soc/loongson/loongson_i2s.c
> @@ -246,6 +246,7 @@ struct snd_soc_dai_driver loongson_i2s_dai = {
>  	.ops = &loongson_i2s_dai_ops,
>  	.symmetric_rate = 1,
>  };
> +EXPORT_SYMBOL_GPL(loongson_i2s_dai);
>  
>  static int i2s_suspend(struct device *dev)
>  {
> @@ -268,3 +269,7 @@ static int i2s_resume(struct device *dev)
>  const struct dev_pm_ops loongson_i2s_pm = {
>  	SYSTEM_SLEEP_PM_OPS(i2s_suspend, i2s_resume)
>  };
> +EXPORT_SYMBOL_GPL(loongson_i2s_pm);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_DESCRIPTION("Common functions for loongson I2S controller driver");
> -- 
> 2.39.5


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