Hi Dan, I love your patch! Perhaps something to improve: [auto build test WARNING on net-next/master] [also build test WARNING on robh/for-next sparc-next/master net/master linus/master v5.7 next-20200604] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Dan-Murphy/RGMII-Internal-delay-common-property/20200605-003113 base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git cb8e59cc87201af93dfbb6c3dccc8fcad72a09c2 config: x86_64-allmodconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project ac47588bc4ff5927a01ed6fcd269ce86aba52a7c) 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 All warnings (new ones prefixed by >>, old ones prefixed by <<): >> drivers/net/phy/dp83869.c:103:18: warning: unused variable 'dp83869_internal_delay' [-Wunused-const-variable] static const int dp83869_internal_delay[] = {250, 500, 750, 1000, 1250, 1500, ^ 1 warning generated. vim +/dp83869_internal_delay +103 drivers/net/phy/dp83869.c 102 > 103 static const int dp83869_internal_delay[] = {250, 500, 750, 1000, 1250, 1500, 104 1750, 2000, 2250, 2500, 2750, 3000, 105 3250, 3500, 3750, 4000}; 106 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org