Hi Jakub,

I love your patch! Yet something to improve:

[auto build test ERROR on net-next/master]

url:    https://github.com/0day-ci/linux/commits/Jakub-Kicinski/udp_tunnel-add-NIC-RX-port-offload-infrastructure/20200709-092214
base:   https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git e80a07b244dd6726094da73d58537c131cc0b1a6
config: arm-spear6xx_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
        # 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@intel.com>

All errors (new ones prefixed by >>):

   arm-linux-gnueabi-ld: net/ethtool/tunnels.o: in function `ethnl_tunnel_info_fill_reply':
>> tunnels.c:(.text+0x2d4): undefined reference to `udp_tunnel_nic_ops'
   arm-linux-gnueabi-ld: net/ethtool/tunnels.o: in function `ethnl_tunnel_info_doit':
   tunnels.c:(.text+0x4ec): undefined reference to `udp_tunnel_nic_ops'

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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org