Hi Su, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on mmotm/master] url: https://github.com/0day-ci/linux/commits/Su-Hui/mm-remove-the-redundancy-code/20200630-013137 base: git://git.cmpxchg.org/linux-mmotm.git master config: x86_64-allnoconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project cf1d04484344be52ada8178e41d18fd15a9b880c) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): ^ include/linux/mm.h:162:2: note: insert 'break;' to avoid fall-throughinclude/linux/signal.h case 72: ^ break; : include/linux/mm.h:190164:2: warning: unannotated fall-through between switch labels case 64::include/linux/mm.h:164:2: note: insert '__attribute__((fallthrough));' to silence this warning >> case 64:2: warning: unannotated fall-through between switch labels case 1: = 0; ^ include/linux/signal.h:190:2: note: insert '__attribute__((fallthrough));' to silence this warning case 1: = 0; ^ __attribute__((fallthrough)); include/linux/signal.h:190:2: note: insert 'break;' to avoid fall-through case 1: = 0; ^ break; include/linux/signal.h:203:2: warning: unannotated fall-through between switch labels case 1: = -1; ^ --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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