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

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-lk...) 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/69522c02d34bab7ab9e5da1a294a73... 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(a)intel.com&gt; 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: 649 | void apple_mca_release_dma_chans(struct mca_data *mca) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ 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 648 650 { 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 } 663 665 { 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