[broonie-misc:at91sam9g20ek 10/12] sound/soc/codecs/wm8731-spi.c:28:42: error: dereferencing pointer to incomplete type 'struct wm8731_priv'

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git at91sam9g20ek
head:   3924683a22e84ba06478ea4aaa775319ba02f42c
commit: 5b7214a7b726cbf25aaebfc8a05ede8c53d04d26 [10/12] ASoC: wm8731: Factor out the I2C and SPI bus code into separate modules
config: i386-allyesconfig (https://download.01.org/0day-ci/archive/20220325/202203252118.msEIfy1L-lkp@intel.com/config)
compiler: gcc-9 (Ubuntu 9.4.0-1ubuntu1~20.04.1) 9.4.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git/commit/?id=5b7214a7b726cbf25aaebfc8a05ede8c53d04d26
        git remote add broonie-misc https://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git
        git fetch --no-tags broonie-misc at91sam9g20ek
        git checkout 5b7214a7b726cbf25aaebfc8a05ede8c53d04d26
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   sound/soc/codecs/wm8731-spi.c: In function 'wm8731_spi_probe':
>> sound/soc/codecs/wm8731-spi.c:28:42: error: dereferencing pointer to incomplete type 'struct wm8731_priv'
      28 |  wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL);
         |                                          ^~~~~~~
   sound/soc/codecs/wm8731-spi.c:34:19: error: implicit declaration of function 'devm_regmap_init_spi' [-Werror=implicit-function-declaration]
      34 |  wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
         |                   ^~~~~~~~~~~~~~~~~~~~
   sound/soc/codecs/wm8731-spi.c:34:46: error: 'wm8731_regmap' undeclared (first use in this function)
      34 |  wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
         |                                              ^~~~~~~~~~~~~
   sound/soc/codecs/wm8731-spi.c:34:46: note: each undeclared identifier is reported only once for each function it appears in
   sound/soc/codecs/wm8731-spi.c:42:9: error: implicit declaration of function 'wm8731_init' [-Werror=implicit-function-declaration]
      42 |  return wm8731_init(&spi->dev, wm8731);
         |         ^~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +28 sound/soc/codecs/wm8731-spi.c

    22	
    23	static int wm8731_spi_probe(struct spi_device *spi)
    24	{
    25		struct wm8731_priv *wm8731;
    26		int ret;
    27	
  > 28		wm8731 = devm_kzalloc(&spi->dev, sizeof(*wm8731), GFP_KERNEL);
    29		if (wm8731 == NULL)
    30			return -ENOMEM;
    31	
    32		spi_set_drvdata(spi, wm8731);
    33	
    34		wm8731->regmap = devm_regmap_init_spi(spi, &wm8731_regmap);
    35		if (IS_ERR(wm8731->regmap)) {
    36			ret = PTR_ERR(wm8731->regmap);
    37			dev_err(&spi->dev, "Failed to allocate register map: %d\n",
    38				ret);
    39			return ret;
    40		}
    41	
    42		return wm8731_init(&spi->dev, wm8731);
    43	}
    44	

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