Hi Jakub, I love your patch! Perhaps something to improve: [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Jakub-Kicinski/udp_tunnel-NIC-RX... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 2be53e0e4690a764b6af18536eb78b811f40eacc config: arc-allyesconfig (attached as .config) compiler: arc-elf-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=arc 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 >>): drivers/net/ethernet/amd/xgbe/xgbe-drv.c: In function 'xgbe_set_features': 2234 | netdev_features_t udp_tunnel; | ^~~~~~~~~~ vim +/udp_tunnel +2234 drivers/net/ethernet/amd/xgbe/xgbe-drv.c 1a510ccf5869a95 Lendacky, Thomas 2017-08-18 2227 c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2228 static int xgbe_set_features(struct net_device *netdev, c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2229 netdev_features_t features) c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2230 { c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2231 struct xgbe_prv_data *pdata = netdev_priv(netdev); c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2232 struct xgbe_hw_if *hw_if = &pdata->hw_if; 5b9dfe299e55604 Lendacky, Thomas 2014-11-04 2233 netdev_features_t rxhash, rxcsum, rxvlan, rxvlan_filter; 1a510ccf5869a95 Lendacky, Thomas 2017-08-18 @2234 netdev_features_t udp_tunnel; 5b9dfe299e55604 Lendacky, Thomas 2014-11-04 2235 int ret = 0; c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2236 5b9dfe299e55604 Lendacky, Thomas 2014-11-04 2237 rxhash = pdata->netdev_features & NETIF_F_RXHASH; 801c62d945c6121 Lendacky, Thomas 2014-06-24 2238 rxcsum = pdata->netdev_features & NETIF_F_RXCSUM; 801c62d945c6121 Lendacky, Thomas 2014-06-24 2239 rxvlan = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_RX; 801c62d945c6121 Lendacky, Thomas 2014-06-24 2240 rxvlan_filter = pdata->netdev_features & NETIF_F_HW_VLAN_CTAG_FILTER; 1a510ccf5869a95 Lendacky, Thomas 2017-08-18 2241 udp_tunnel = pdata->netdev_features & NETIF_F_GSO_UDP_TUNNEL; c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2242 5b9dfe299e55604 Lendacky, Thomas 2014-11-04 2243 if ((features & NETIF_F_RXHASH) && !rxhash) 5b9dfe299e55604 Lendacky, Thomas 2014-11-04 2244 ret = hw_if->enable_rss(pdata); 5b9dfe299e55604 Lendacky, Thomas 2014-11-04 2245 else if (!(features & NETIF_F_RXHASH) && rxhash) 5b9dfe299e55604 Lendacky, Thomas 2014-11-04 2246 ret = hw_if->disable_rss(pdata); 5b9dfe299e55604 Lendacky, Thomas 2014-11-04 2247 if (ret) 5b9dfe299e55604 Lendacky, Thomas 2014-11-04 2248 return ret; 5b9dfe299e55604 Lendacky, Thomas 2014-11-04 2249 801c62d945c6121 Lendacky, Thomas 2014-06-24 2250 if ((features & NETIF_F_RXCSUM) && !rxcsum) c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2251 hw_if->enable_rx_csum(pdata); 801c62d945c6121 Lendacky, Thomas 2014-06-24 2252 else if (!(features & NETIF_F_RXCSUM) && rxcsum) c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2253 hw_if->disable_rx_csum(pdata); c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2254 801c62d945c6121 Lendacky, Thomas 2014-06-24 2255 if ((features & NETIF_F_HW_VLAN_CTAG_RX) && !rxvlan) c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2256 hw_if->enable_rx_vlan_stripping(pdata); 801c62d945c6121 Lendacky, Thomas 2014-06-24 2257 else if (!(features & NETIF_F_HW_VLAN_CTAG_RX) && rxvlan) c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2258 hw_if->disable_rx_vlan_stripping(pdata); 801c62d945c6121 Lendacky, Thomas 2014-06-24 2259 801c62d945c6121 Lendacky, Thomas 2014-06-24 2260 if ((features & NETIF_F_HW_VLAN_CTAG_FILTER) && !rxvlan_filter) 801c62d945c6121 Lendacky, Thomas 2014-06-24 2261 hw_if->enable_rx_vlan_filtering(pdata); 801c62d945c6121 Lendacky, Thomas 2014-06-24 2262 else if (!(features & NETIF_F_HW_VLAN_CTAG_FILTER) && rxvlan_filter) 801c62d945c6121 Lendacky, Thomas 2014-06-24 2263 hw_if->disable_rx_vlan_filtering(pdata); c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2264 c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2265 pdata->netdev_features = features; c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2266 c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2267 DBGPR("<--xgbe_set_features\n"); c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2268 c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2269 return 0; c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2270 } c5aa9e3b815645e Lendacky, Thomas 2014-06-05 2271 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org