tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: fb57b1fabcb28f358901b2df90abd2b48abc1ca8 commit: 72ad02b15d6367f9897db62313cc69fb0a20ee1f [521/10701] iio: Add SEMTECH SX9310/9311 sensor driver config: x86_64-randconfig-r023-20200519 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 135b877874fae96b4372c8a3fbfaa8ff44ff86e3) reproduce: 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 git checkout 72ad02b15d6367f9897db62313cc69fb0a20ee1f # 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: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): >> drivers/iio/proximity/sx9310.c:1040:34: warning: unused variable 'sx9310_of_match' [-Wunused-const-variable] static const struct of_device_id sx9310_of_match[] = { ^ 1 warning generated. vim +/sx9310_of_match +1040 drivers/iio/proximity/sx9310.c 1039 > 1040 static const struct of_device_id sx9310_of_match[] = { 1041 { .compatible = "semtech,sx9310" }, 1042 { .compatible = "semtech,sx9311" }, 1043 {}, 1044 }; 1045 MODULE_DEVICE_TABLE(of, sx9310_of_match); 1046 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org