tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 1c925d2030afd354a02c23500386e620e662622b commit: ef3631220d2b3d8d14cf64464760505baa60d6ac [1621/2336] net: ks8851: Register MDIO bus and the internal PHY config: arm-efm32_defconfig (attached as .config) compiler: arm-linux-gnueabi-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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=ef3631220d2b3d8d14cf64464760505baa60d6ac git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout ef3631220d2b3d8d14cf64464760505baa60d6ac # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): arm-linux-gnueabi-ld: drivers/net/ethernet/micrel/ks8851_common.o: in function `ks8851_probe_common': >> ks8851_common.c:(.text+0xbf4): undefined reference to `mdiobus_alloc_size' >> arm-linux-gnueabi-ld: ks8851_common.c:(.text+0xc30): undefined reference to `__mdiobus_register' >> arm-linux-gnueabi-ld: ks8851_common.c:(.text+0xc3a): undefined reference to `mdiobus_free' >> arm-linux-gnueabi-ld: ks8851_common.c:(.text+0xccc): undefined reference to `mdiobus_unregister' arm-linux-gnueabi-ld: drivers/net/ethernet/micrel/ks8851_common.o: in function `ks8851_remove_common': >> ks8851_common.c:(.text+0xe82): undefined reference to `mdiobus_unregister' arm-linux-gnueabi-ld: ks8851_common.c:(.text+0xe8a): undefined reference to `mdiobus_free' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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