Re: sound/soc/codecs/tlv320adcx140.c:776:34: warning: unused variable 'tlv320adcx140_of_match'

From: Dan Murphy
Date: Tue May 26 2020 - 10:42:10 EST


On 5/22/20 2:16 PM, kbuild test robot wrote:
tree: 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 ( 3393cc4cebf9969db94dc424b7a2b6195589c33b)
reproduce (this is a W=1 build):
wget -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

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@xxxxxxxxx>

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

> 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);

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