Hi Jiri, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Jiri-Pirko/introduce-line-card-s... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git f50e2f9f791647aa4e5b19d0064f5cabf630bf6e config: nios2-allyesconfig (attached as .config) compiler: nios2-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/9e90bcbbf46d028ac585fa0fb3558524b... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Jiri-Pirko/introduce-line-card-support-for-modular-switch/20210113-201955 git checkout 9e90bcbbf46d028ac585fa0fb3558524bd6df63c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nios2 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 >>): 1165 | .supported_types = nsim_dev_linecard_supported_types, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/const +1165 drivers/net/netdevsim/dev.c 1163 1164 static const struct devlink_linecard_ops nsim_dev_linecard_ops = { 1166 .supported_types_count = ARRAY_SIZE(nsim_dev_linecard_supported_types), 1167 .provision = nsim_dev_linecard_provision, 1168 .unprovision = nsim_dev_linecard_unprovision, 1169 }; 1170 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org