Hi "Marek, Thank you for the patch! Yet something to improve: [auto build test ERROR on net-next/master] url: https://github.com/0day-ci/linux/commits/Marek-Beh-n/net-mdiobus-add-supp... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 07dd1b7e68e4b83a1004b14dffd7e142c0bc79bd config: ia64-randconfig-r003-20200714 (attached as .config) compiler: ia64-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 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 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 >>): In file included from arch/ia64/include/asm/pgtable.h:154, from include/linux/pgtable.h:6, from include/linux/mm.h:32, from include/linux/bvec.h:13, from include/linux/skbuff.h:17, from include/linux/if_ether.h:19, from include/linux/etherdevice.h:20, from drivers/net/phy/mdio_bus.c:14: arch/ia64/include/asm/mmu_context.h: In function 'reload_context': arch/ia64/include/asm/mmu_context.h:137:41: warning: variable 'old_rr4' set but not used [-Wunused-but-set-variable] 137 | unsigned long rr0, rr1, rr2, rr3, rr4, old_rr4; | ^~~~~~~ drivers/net/phy/mdio_bus.c: At top level: 42 | #include "mdio_debugfs.h" | ^~~~~~~~~~~~~~~~ compilation terminated. vim +42 drivers/net/phy/mdio_bus.c 40 41 #include "mdio-boardinfo.h" 43 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org