[kbuild-all] sound/pci/hda/patch_ca0132.c:8214:10: warning: no case matching constant switch condition '0'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 9c87c9f41245baa3fc4716cf39141439cf405b01 commit: bf2aa9ccc8e598d788132ded9c7e94c6af3a9d1e ALSA: hda/ca0132 - Cleanup ca0132_mmio_init function. date: 3 months ago config: arm64-randconfig-r005-20201117 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ace9653c11c6308401dcda2e8b26bf97e6e66e30) 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 # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout bf2aa9ccc8e598d788132ded9c7e94c6af3a9d1e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 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 >>): switch (ca0132_quirk(spec)) { ^~~~~~~~~~~~~~~~~~ sound/pci/hda/patch_ca0132.c:1076:29: note: expanded from macro 'ca0132_quirk' #define ca0132_quirk(spec) ({ (void)(spec); QUIRK_NONE; }) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. vim +/0 +8214 sound/pci/hda/patch_ca0132.c 8209 8210 static void ca0132_mmio_init(struct hda_codec *codec) 8211 { 8212 struct ca0132_spec *spec = codec->spec; 8213 8215 case QUIRK_R3D: 8216 case QUIRK_SBZ: 8217 case QUIRK_ZXR: 8218 ca0132_mmio_init_sbz(codec); 8219 break; 8220 case QUIRK_AE5: 8221 ca0132_mmio_init_ae5(codec); 8222 break; 8223 } 8224 } 8225 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org