linux-kernel - [esmil:visionfive 39/54] sound/soc/starfive/pwmdac.h:145:6: warning: no previous prototype for 'sf_pwmdac_pcm_push

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Date:   Thu, 21 Apr 2022 14:40:51 +0800
From:   kernel test robot <lkp@...el.com>
To:     Walker Chen <walker.chen@...rfivetech.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Emil Renner Berthing <kernel@...il.dk>,
        Michael Yan <michael.yan@...rfivetech.com>,
        Jenny Zhang <jenny.zhang@...rfivetech.com>
Subject: [esmil:visionfive 39/54] sound/soc/starfive/pwmdac.h:145:6: warning:
 no previous prototype for 'sf_pwmdac_pcm_push_tx'

tree:   https://github.com/esmil/linux visionfive
head:   68fe13e37af4c8331cdd40841353c9725cb65925
commit: bd837079985c8fbf12bd972a21ddacef9d4c4121 [39/54] ASoC: starfive: Add StarFive JH7100 audio drivers
config: csky-randconfig-r004-20220420 (https://download.01.org/0day-ci/archive/20220420/202204202206.ZXx9bPpx-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 11.2.0
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
        # https://github.com/esmil/linux/commit/bd837079985c8fbf12bd972a21ddacef9d4c4121
        git remote add esmil https://github.com/esmil/linux
        git fetch --no-tags esmil visionfive
        git checkout bd837079985c8fbf12bd972a21ddacef9d4c4121
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross W=1 O=build_dir ARCH=csky SHELL=/bin/bash sound/soc/

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

All warnings (new ones prefixed by >>):

   In file included from sound/soc/starfive/pwmdac.c:19:
>> sound/soc/starfive/pwmdac.h:145:6: warning: no previous prototype for 'sf_pwmdac_pcm_push_tx' [-Wmissing-prototypes]
     145 | void sf_pwmdac_pcm_push_tx(struct sf_pwmdac_dev *dev) { }
         |      ^~~~~~~~~~~~~~~~~~~~~
>> sound/soc/starfive/pwmdac.h:146:6: warning: no previous prototype for 'sf_pwmdac_pcm_pop_rx' [-Wmissing-prototypes]
     146 | void sf_pwmdac_pcm_pop_rx(struct sf_pwmdac_dev *dev) { }
         |      ^~~~~~~~~~~~~~~~~~~~
>> sound/soc/starfive/pwmdac.h:147:5: warning: no previous prototype for 'sf_pwmdac_pcm_register' [-Wmissing-prototypes]
     147 | int sf_pwmdac_pcm_register(struct platform_device *pdev)
         |     ^~~~~~~~~~~~~~~~~~~~~~


vim +/sf_pwmdac_pcm_push_tx +145 sound/soc/starfive/pwmdac.h

   137	
   138	
   139	
   140	#if IS_ENABLED(CONFIG_SND_STARFIVE_PWMDAC_PCM)
   141	void sf_pwmdac_pcm_push_tx(struct sf_pwmdac_dev *dev);
   142	void sf_pwmdac_pcm_pop_rx(struct sf_pwmdac_dev *dev);
   143	int sf_pwmdac_pcm_register(struct platform_device *pdev);
   144	#else
 > 145	void sf_pwmdac_pcm_push_tx(struct sf_pwmdac_dev *dev) { }
 > 146	void sf_pwmdac_pcm_pop_rx(struct sf_pwmdac_dev *dev) { }
 > 147	int sf_pwmdac_pcm_register(struct platform_device *pdev)
   148	{
   149		return -EINVAL;
   150	}
   151	#endif
   152	

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