tree: https://github.com/ammarfaizi2/linux-block axboe/linux-block/m1-test head: 5adfbb595194191bad98c47447ddbee7d3b60b8f commit: 11c140423f34e589a6390d378267811426f82984 [340/382] soc: apple: rtkit: Add recv_message_early callback and apple_rtkit_poll config: arm64-randconfig-r003-20220216 (https://download.01.org/0day-ci/archive/20220216/202202161241.peuSiTA3-lk...) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 0e628a783b935c70c80815db6c061ec84f884af5) 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://github.com/ammarfaizi2/linux-block/commit/11c140423f34e589a6390d3... git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block git fetch --no-tags ammarfaizi2-block axboe/linux-block/m1-test git checkout 11c140423f34e589a6390d378267811426f82984 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/nvme/host/ 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 >>): In file included from drivers/nvme/host/apple.c:32: int apple_rtkit_poll(struct apple_rtkit *rtk) ^ include/linux/soc/apple/rtkit.h:223:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int apple_rtkit_poll(struct apple_rtkit *rtk) ^ static 1 warning generated. vim +/apple_rtkit_poll +223 include/linux/soc/apple/rtkit.h 222 224 { 225 return -ENODEV; 226 } 227 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org