Hi Corentin, I love your patch! Perhaps something to improve: [auto build test WARNING on broonie-regulator/for-next] [also build test WARNING on sunxi/sunxi/for-next linus/master v5.18 next-20220520] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/intel-lab-lkp/linux/commits/Corentin-Labbe/arm64-add-ethernet-to-orange-pi-3/20220523-133344 base: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator.git for-next config: mips-cu1830-neo_defconfig (https://download.01.org/0day-ci/archive/20220523/202205231735.QGDB1Mcy-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 768a1ca5eccb678947f4155e38a5f5744dcefb56) 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 mips cross compiling tool for clang build # apt-get install binutils-mips-linux-gnu # https://github.com/intel-lab-lkp/linux/commit/7ae2ab7d1efe8091f6b7ea048a7ac495afba9e46 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Corentin-Labbe/arm64-add-ethernet-to-orange-pi-3/20220523-133344 git checkout 7ae2ab7d1efe8091f6b7ea048a7ac495afba9e46 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash drivers/net/mdio/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from drivers/net/mdio/of_mdio.c:13: >> include/linux/fwnode_mdio.h:20:5: warning: no previous prototype for function 'fwnode_mdiobus_phy_device_register' [-Wmissing-prototypes] int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio, ^ include/linux/fwnode_mdio.h:20:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio, ^ static 1 warning generated. vim +/fwnode_mdiobus_phy_device_register +20 include/linux/fwnode_mdio.h bc1bee3b87ee48b Calvin Johnson 2021-06-11 10 bc1bee3b87ee48b Calvin Johnson 2021-06-11 11 #if IS_ENABLED(CONFIG_FWNODE_MDIO) bc1bee3b87ee48b Calvin Johnson 2021-06-11 12 int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio, bc1bee3b87ee48b Calvin Johnson 2021-06-11 13 struct phy_device *phy, bc1bee3b87ee48b Calvin Johnson 2021-06-11 14 struct fwnode_handle *child, u32 addr); bc1bee3b87ee48b Calvin Johnson 2021-06-11 15 bc1bee3b87ee48b Calvin Johnson 2021-06-11 16 int fwnode_mdiobus_register_phy(struct mii_bus *bus, bc1bee3b87ee48b Calvin Johnson 2021-06-11 17 struct fwnode_handle *child, u32 addr); bc1bee3b87ee48b Calvin Johnson 2021-06-11 18 bc1bee3b87ee48b Calvin Johnson 2021-06-11 19 #else /* CONFIG_FWNODE_MDIO */ bc1bee3b87ee48b Calvin Johnson 2021-06-11 @20 int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio, bc1bee3b87ee48b Calvin Johnson 2021-06-11 21 struct phy_device *phy, bc1bee3b87ee48b Calvin Johnson 2021-06-11 22 struct fwnode_handle *child, u32 addr) bc1bee3b87ee48b Calvin Johnson 2021-06-11 23 { bc1bee3b87ee48b Calvin Johnson 2021-06-11 24 return -EINVAL; bc1bee3b87ee48b Calvin Johnson 2021-06-11 25 } bc1bee3b87ee48b Calvin Johnson 2021-06-11 26 -- 0-DAY CI Kernel Test Service https://01.org/lkp