Hi Heiko, I love your patch! Perhaps something to improve: [auto build test WARNING on net-next/master] [also build test WARNING on sparc-next/master net/master linus/master v5.8-rc1 next-20200615] [cannot apply to robh/for-next] [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/Heiko-Stuebner/net-phy-mscc-move... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git cb8e59cc87201af93dfbb6c3dccc8fcad72a09c2 config: x86_64-allyesconfig (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3d8149c2a1228609fd7d7c91a04681304a2f0ca9) 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 <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): vsc8531->base_addr, 0); ^~~~~~~ drivers/net/phy/mscc/mscc_main.c:1986:33: note: initialize the variable 'vsc8531' to silence this warning struct vsc8531_private *vsc8531; ^ = NULL 1 warning generated. vim +/vsc8531 +2002 drivers/net/phy/mscc/mscc_main.c 1983 1984 static int vsc8574_probe(struct phy_device *phydev) 1985 { 1986 struct vsc8531_private *vsc8531; 1987 int rc; 1988 u32 default_mode[4] = {VSC8531_LINK_1000_ACTIVITY, 1989 VSC8531_LINK_100_ACTIVITY, VSC8531_LINK_ACTIVITY, 1990 VSC8531_DUPLEX_COLLISION}; 1991 1992 rc = vsc85xx_probe_helper(phydev, default_mode, 1993 ARRAY_SIZE(default_mode), 1994 VSC8584_SUPP_LED_MODES, 1995 vsc8584_hw_stats, 1996 ARRAY_SIZE(vsc8584_hw_stats)); 1997 if (rc < 0) 1998 return rc; 1999 2000 vsc8584_get_base_addr(phydev); 2001 return devm_phy_package_join(&phydev->mdio.dev, phydev, 2003 } 2004 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org