Hi Michael, I love your patch! Yet something to improve: [auto build test ERROR on net/master] [also build test ERROR on net-next/master ipvs/master linus/master v5.10-rc4 next-20201118] [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/0day-ci/linux/commits/Michael-Grzeschik/net-dsa-microc... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git a3dcb3e7e70c72a68a79b30fc3a3adad5612731c config: h8300-randconfig-r031-20201119 (attached as .config) compiler: h8300-linux-gcc (GCC) 9.3.0 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 # https://github.com/0day-ci/linux/commit/9debc1a2179402cc4391e253c57fafa0e... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Michael-Grzeschik/net-dsa-microchip-make-ksz8795-driver-more-dynamic/20201119-060705 git checkout 9debc1a2179402cc4391e253c57fafa0ef357e05 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=h8300 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/net/dsa/microchip/ksz8795.c: In function 'ksz8795_get_strings': 659 | for (i = 0; i < dev->mib_cnt; i++) { | ^~~ | cdev drivers/net/dsa/microchip/ksz8795.c:659:18: note: each undeclared identifier is reported only once for each function it appears in vim +659 drivers/net/dsa/microchip/ksz8795.c 653 654 static void ksz8795_get_strings(struct dsa_switch *ds, int port, 655 u32 stringset, uint8_t *buf) 656 { 657 int i; 658 660 memcpy(buf + i * ETH_GSTRING_LEN, mib_names[i].string, 661 ETH_GSTRING_LEN); 662 } 663 } 664 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org