tree: https://github.com/zen-kernel/zen-kernel 5.8/zen-sauce head: 4ae00f4cbefe933616f33bf79935393ec49dbfa3 commit: 994279ebfc0d19e185792fb11cacb63e6750e22e [11/26] ZEN: Add OpenRGB patches config: arm64-randconfig-r005-20200807 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project aa57cabae2fc5abc08ab3e17b45f2890fc7c9e42) 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 git checkout 994279ebfc0d19e185792fb11cacb63e6750e22e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm64 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 >>): static const char * const nct6775_device_names[] = { ^ drivers/i2c/busses/i2c-nct6775.c:136:1: warning: unused function 'superio_outb' [-Wunused-function] superio_outb(int ioreg, int reg, int val) ^ 2 warnings generated. vim +/nct6775_device_names +93 drivers/i2c/busses/i2c-nct6775.c 91 92 /* used to set data->name = nct6775_device_names[data->sio_kind] */ 94 "nct6106", 95 "nct6775", 96 "nct6776", 97 "nct6779", 98 "nct6791", 99 "nct6792", 100 "nct6793", 101 "nct6795", 102 "nct6796", 103 "nct6798", 104 }; 105 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org