[asahilinux:touchpad/wip 65/82] sound/soc/apple/mca.c:649:6: warning: no previous prototype for 'apple_mca_release_dma_chans'

[asahilinux:touchpad/wip 65/82] sound/soc/apple/mca.c:649:6: warning: no previous prototype for 'apple_mca_release_dma_chans'

[kernel test robot]

tree:   https://github.com/AsahiLinux/linux touchpad/wip
head:   a2281d64fdbcbab0dae68c6ea75bd5b548332e06
commit: 69522c02d34bab7ab9e5da1a294a7387e9ca5f8c [65/82] ASoC: apple-mca: Add platform driver for Apple SoCs
config: s390-allyesconfig (https://download.01.org/0day-ci/archive/20211216/202112160704.pOSNBaTM-lkp@intel.com/config)
compiler: s390-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/AsahiLinux/linux/commit/69522c02d34bab7ab9e5da1a294a7387e9ca5f8c
        git remote add asahilinux https://github.com/AsahiLinux/linux
        git fetch --no-tags asahilinux touchpad/wip
        git checkout 69522c02d34bab7ab9e5da1a294a7387e9ca5f8c
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=s390 SHELL=/bin/bash drivers/clk/ drivers/dma/ sound/soc/apple/

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

All warnings (new ones prefixed by >>):

   sound/soc/apple/mca.c: In function 'mca_configure_serdes':
   sound/soc/apple/mca.c:210:23: error: implicit declaration of function 'FIELD_PREP' [-Werror=implicit-function-declaration]
     210 |         serdes_conf = FIELD_PREP(SERDES_CONF_NCHANS, max(slots, 1) - 1);
         |                       ^~~~~~~~~~
   sound/soc/apple/mca.c: In function 'mca_set_runtime_hwparams':
   sound/soc/apple/mca.c:528:37: warning: unused variable 'rtd' [-Wunused-variable]
     528 |         struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
         |                                     ^~~
   sound/soc/apple/mca.c: At top level:
>> sound/soc/apple/mca.c:649:6: warning: no previous prototype for 'apple_mca_release_dma_chans' [-Wmissing-prototypes]
     649 | void apple_mca_release_dma_chans(struct mca_data *mca)
         |      ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>> sound/soc/apple/mca.c:664:6: warning: no previous prototype for 'apple_mca_put_clks' [-Wmissing-prototypes]
     664 | void apple_mca_put_clks(struct mca_data *mca)
         |      ^~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/apple_mca_release_dma_chans +649 sound/soc/apple/mca.c

   648	
 > 649	void apple_mca_release_dma_chans(struct mca_data *mca)
   650	{
   651		int i;
   652		struct mca_route *route;
   653	
   654		list_for_each_entry(route, &mca->routes, list) {
   655			for_each_pcm_streams(i) {
   656				if (!route->chan[i])
   657					continue;
   658				dma_release_channel(route->chan[i]);
   659				route->chan[i] = NULL;
   660			}
   661		}
   662	}
   663	
 > 664	void apple_mca_put_clks(struct mca_data *mca)
   665	{
   666		struct mca_route *route;
   667		int i;
   668	
   669		list_for_each_entry(route, &mca->routes, list) {
   670			if (!route->clk_parent)
   671				continue;
   672			//clk_rate_exclusive_put(route->clk_parent);
   673			route->clk_parent = NULL;
   674		}
   675	
   676		for (i = 0; i < mca->nclusters; i++) {
   677			if (!mca->clk_parents[i])
   678				continue;
   679			clk_put(mca->clk_parents[i]);
   680			mca->clk_parents[i] = NULL;
   681		}
   682	}
   683	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org