tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 2a8927f0efb6fb34b9d11dab3bd3f018e866d36d commit: 88d1250267535b26106ca9582701bbad940cec01 [8127/13009] mtd: devices: add support for microchip 48l640 EERAM config: x86_64-randconfig-r025-20210625 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9ca0171a9ffdef5fdb1511d197a3fd72490362de) 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 # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=88d1250267535b26106ca9582701bbad940cec01 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 88d1250267535b26106ca9582701bbad940cec01 # 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 All warnings (new ones prefixed by >>): >> drivers/mtd/devices/mchp48l640.c:350:34: warning: unused variable 'mchp48l640_of_table' [-Wunused-const-variable] static const struct of_device_id mchp48l640_of_table[] = { ^ 1 warning generated. vim +/mchp48l640_of_table +350 drivers/mtd/devices/mchp48l640.c 349 > 350 static const struct of_device_id mchp48l640_of_table[] = { 351 { 352 .compatible = "microchip,48l640", 353 .data = &mchp48l640_caps, 354 }, 355 {} 356 }; 357 MODULE_DEVICE_TABLE(of, mchp48l640_of_table); 358 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org