linux-kernel - Re: sound/soc/codecs/tlv320adcx140.c:776:34: warning: unused variable 'tlv320adcx140_of

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Date:   Tue, 26 May 2020 09:41:00 -0500
From:   Dan Murphy <dmurphy@...com>
To:     kbuild test robot <lkp@...el.com>
CC:     <kbuild-all@...ts.01.org>, <clang-built-linux@...glegroups.com>,
        <linux-kernel@...r.kernel.org>, Mark Brown <broonie@...nel.org>
Subject: Re: sound/soc/codecs/tlv320adcx140.c:776:34: warning: unused variable
 'tlv320adcx140_of_match'

Hello

On 5/22/20 2:16 PM, kbuild test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   4286d192c803571e8ca43b0f1f8ea04d663a278a
> commit: 689c7655b50c5de2b6f0f42fecfb37bde5acf040 ASoC: tlv320adcx140: Add the tlv320adcx140 codec driver family
> date:   3 months ago
> config: mips-randconfig-r014-20200522 (attached as .config)
> compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3393cc4cebf9969db94dc424b7a2b6195589c33b)
> reproduce (this is a W=1 build):
>          wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>          chmod +x ~/bin/make.cross
>          # install mips cross compiling tool for clang build
>          # apt-get install binutils-mips-linux-gnu
>          git checkout 689c7655b50c5de2b6f0f42fecfb37bde5acf040
>          # save the attached .config to linux build tree
>          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=mips
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kbuild test robot <lkp@...el.com>
>
> All warnings (new ones prefixed by >>, old ones prefixed by <<):
>
>>> sound/soc/codecs/tlv320adcx140.c:776:34: warning: unused variable 'tlv320adcx140_of_match' [-Wunused-const-variable]
> static const struct of_device_id tlv320adcx140_of_match[] = {
> ^
> 1 warning generated.
>
> vim +/tlv320adcx140_of_match +776 sound/soc/codecs/tlv320adcx140.c
>
>     775	
>   > 776	static const struct of_device_id tlv320adcx140_of_match[] = {
>     777		{ .compatible = "ti,tlv320adc3140" },
>     778		{ .compatible = "ti,tlv320adc5140" },
>     779		{ .compatible = "ti,tlv320adc6140" },
>     780		{},
>     781	};
>     782	MODULE_DEVICE_TABLE(of, tlv320adcx140_of_match);
>     783	

I am not sure about this issue the same code appears in many drivers ie 
the TAS2562 and that did not create a warning within this build AFAIK

Dan