linux-kernel - sound/soc/codecs/wm8731-i2c.c:65:1: error: type defaults to 'int' in declaration of 'module_i2c

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Date:   Tue, 6 Sep 2022 20:02:17 +0800
From:   kernel test robot <lkp@...el.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: sound/soc/codecs/wm8731-i2c.c:65:1: error: type defaults to 'int' in
 declaration of 'module_i2c_driver'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   53e99dcff61e1523ec1c3628b2d564ba15d32eb7
commit: 9dc15f81baf273b5aaaa3302ee8faacd78f361fd ASoC: wm8731: Factor out the I2C and SPI bus code into separate modules
date:   5 months ago
config: mips-randconfig-s033-20220906 (https://download.01.org/0day-ci/archive/20220906/202209061939.wShjoFWE-lkp@intel.com/config)
compiler: mipsel-linux-gcc (GCC) 12.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9dc15f81baf273b5aaaa3302ee8faacd78f361fd
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 9dc15f81baf273b5aaaa3302ee8faacd78f361fd
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=mips SHELL=/bin/bash sound/soc/codecs/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All error/warnings (new ones prefixed by >>):

>> sound/soc/codecs/wm8731-i2c.c:65:1: warning: data definition has no type or storage class
      65 | module_i2c_driver(wm8731_i2c_driver);
         | ^~~~~~~~~~~~~~~~~
>> sound/soc/codecs/wm8731-i2c.c:65:1: error: type defaults to 'int' in declaration of 'module_i2c_driver' [-Werror=implicit-int]
>> sound/soc/codecs/wm8731-i2c.c:65:1: warning: parameter names (without types) in function declaration
   sound/soc/codecs/wm8731-i2c.c:56:26: warning: 'wm8731_i2c_driver' defined but not used [-Wunused-variable]
      56 | static struct i2c_driver wm8731_i2c_driver = {
         |                          ^~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for SND_SOC_WM8731_I2C
   Depends on [n]: SOUND [=y] && !UML && SND [=m] && SND_SOC [=m] && I2C [=n]
   Selected by [m]:
   - SND_SOC_DB1200 [=m] && SOUND [=y] && !UML && SND [=m] && SND_SOC [=m] && SND_SOC_AU1XPSC [=m]


vim +65 sound/soc/codecs/wm8731-i2c.c

    64	
  > 65	module_i2c_driver(wm8731_i2c_driver);
    66	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp