Hi Calvin, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Calvin-Johnson/ACPI-support-for-... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 34bb975126419e86bc3b95e200dc41de6c6ca69c config: x86_64-randconfig-a013-20210311 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 574a9dabc63ba1e7a04c08d4bde2eacd61b44ce1) 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://github.com/0day-ci/linux/commit/d6150b3cf85a42cb75a1d93b64ce7cdf8... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Calvin-Johnson/ACPI-support-for-dpaa2-driver/20210311-142527 git checkout d6150b3cf85a42cb75a1d93b64ce7cdf8e58d4d9 # 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 <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): int fwnode_mdiobus_register_phy(struct mii_bus *bus, ^ drivers/net/mdio/fwnode_mdio.c:17:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int fwnode_mdiobus_register_phy(struct mii_bus *bus, ^ static 1 warning generated. vim +/fwnode_mdiobus_register_phy +17 drivers/net/mdio/fwnode_mdio.c 16 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org