[kbuild-all] [linux-next:master 12191/12292] drivers/video/fbdev/acornfb.c:864:3: error: unannotated fall-through between switch labels

tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: aa14a3016182213f022068500486ef3bcacb9006 commit: 29119f65df4590266028a760d4738541a50f201b [12191/12292] Merge remote-tracking branch 'kspp-gustavo/for-next/kspp' config: arm-randconfig-r014-20210910 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 261cbe98c38f8c1ee1a482fe76511110e790f58a) 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 arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 29119f65df4590266028a760d4738541a50f201b # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): default: ^ drivers/video/fbdev/acornfb.c:864:3: note: insert 'break;' to avoid fall-through default: ^ break; 1 error generated. vim +864 drivers/video/fbdev/acornfb.c ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 848 48c68c4f1b5424 drivers/video/acornfb.c Greg Kroah-Hartman 2012-12-21 849 static void acornfb_parse_dram(char *opt) ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 850 { ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 851 unsigned int size; ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 852 ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 853 size = simple_strtoul(opt, &opt, 0); ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 854 ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 855 if (opt) { ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 856 switch (*opt) { ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 857 case 'M': ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 858 case 'm': ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 859 size *= 1024; df561f6688fef7 drivers/video/fbdev/acornfb.c Gustavo A. R. Silva 2020-08-23 860 fallthrough; ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 861 case 'K': ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 862 case 'k': ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 863 size *= 1024; ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 @864 default: ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 865 break; ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 866 } ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 867 } ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 868 ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 869 current_par.dram_size = size; ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 870 } ^1da177e4c3f41 drivers/video/acornfb.c Linus Torvalds 2005-04-16 871 :::::: The code at line 864 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; :::::: CC: Linus Torvalds <torvalds(a)ppc970.osdl.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org