Hi Andrew, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on vhost/linux-next] [also build test WARNING on net-next/master net/master linus/master v5.14-rc6 next-20210818] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Andrew-Melnychenko/drivers-net-v... base: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next config: i386-randconfig-a015-20210818 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d2b574a4dea5b718e4386bf2e26af0126e5978ce) 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/2205ca0b751f734cf3ea53258d9b8e3f3... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Andrew-Melnychenko/drivers-net-virtio_net-Added-RSS-support/20210819-015744 git checkout 2205ca0b751f734cf3ea53258d9b8e3f3849fe16 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386 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 >>): void virtnet_get_hashflow(const struct virtnet_info *vi, struct ethtool_rxnfc *info) ^ drivers/net/virtio_net.c:2278:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void virtnet_get_hashflow(const struct virtnet_info *vi, struct ethtool_rxnfc *info) ^ static bool virtnet_set_hashflow(struct virtnet_info *vi, struct ethtool_rxnfc *info) ^ drivers/net/virtio_net.c:2330:1: note: declare 'static' if the function is not intended to be used outside of this translation unit bool virtnet_set_hashflow(struct virtnet_info *vi, struct ethtool_rxnfc *info) ^ static drivers/net/virtio_net.c:2627:5: warning: no previous prototype for function 'virtnet_get_rxfh_key_size' [-Wmissing-prototypes] u32 virtnet_get_rxfh_key_size(struct net_device *dev) ^ drivers/net/virtio_net.c:2627:1: note: declare 'static' if the function is not intended to be used outside of this translation unit u32 virtnet_get_rxfh_key_size(struct net_device *dev) ^ static drivers/net/virtio_net.c:2632:5: warning: no previous prototype for function 'virtnet_get_rxfh_indir_size' [-Wmissing-prototypes] u32 virtnet_get_rxfh_indir_size(struct net_device *dev) ^ drivers/net/virtio_net.c:2632:1: note: declare 'static' if the function is not intended to be used outside of this translation unit u32 virtnet_get_rxfh_indir_size(struct net_device *dev) ^ static drivers/net/virtio_net.c:2637:5: warning: no previous prototype for function 'virtnet_get_rxfh' [-Wmissing-prototypes] int virtnet_get_rxfh(struct net_device *dev, u32 *indir, u8 *key, u8 *hfunc) ^ drivers/net/virtio_net.c:2637:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int virtnet_get_rxfh(struct net_device *dev, u32 *indir, u8 *key, u8 *hfunc) ^ static drivers/net/virtio_net.c:2656:5: warning: no previous prototype for function 'virtnet_set_rxfh' [-Wmissing-prototypes] int virtnet_set_rxfh(struct net_device *dev, const u32 *indir, const u8 *key, const u8 hfunc) ^ drivers/net/virtio_net.c:2656:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int virtnet_set_rxfh(struct net_device *dev, const u32 *indir, const u8 *key, const u8 hfunc) ^ static drivers/net/virtio_net.c:2676:5: warning: no previous prototype for function 'virtnet_get_rxnfc' [-Wmissing-prototypes] int virtnet_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info, u32 *rule_locs) ^ drivers/net/virtio_net.c:2676:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int virtnet_get_rxnfc(struct net_device *dev, struct ethtool_rxnfc *info, u32 *rule_locs) ^ static 7 warnings generated. vim +/virtnet_get_hashflow +2278 drivers/net/virtio_net.c 2277 2279 { 2280 info->data = 0; 2281 switch (info->flow_type) { 2282 case TCP_V4_FLOW: 2283 if (vi->rss_hash_types_saved & VIRTIO_NET_RSS_HASH_TYPE_TCPv4) { 2284 info->data = RXH_IP_SRC | RXH_IP_DST | 2285 RXH_L4_B_0_1 | RXH_L4_B_2_3; 2286 } else if (vi->rss_hash_types_saved & VIRTIO_NET_RSS_HASH_TYPE_IPv4) { 2287 info->data = RXH_IP_SRC | RXH_IP_DST; 2288 } 2289 break; 2290 case TCP_V6_FLOW: 2291 if (vi->rss_hash_types_saved & VIRTIO_NET_RSS_HASH_TYPE_TCPv6) { 2292 info->data = RXH_IP_SRC | RXH_IP_DST | 2293 RXH_L4_B_0_1 | RXH_L4_B_2_3; 2294 } else if (vi->rss_hash_types_saved & VIRTIO_NET_RSS_HASH_TYPE_IPv6) { 2295 info->data = RXH_IP_SRC | RXH_IP_DST; 2296 } 2297 break; 2298 case UDP_V4_FLOW: 2299 if (vi->rss_hash_types_saved & VIRTIO_NET_RSS_HASH_TYPE_UDPv4) { 2300 info->data = RXH_IP_SRC | RXH_IP_DST | 2301 RXH_L4_B_0_1 | RXH_L4_B_2_3; 2302 } else if (vi->rss_hash_types_saved & VIRTIO_NET_RSS_HASH_TYPE_IPv4) { 2303 info->data = RXH_IP_SRC | RXH_IP_DST; 2304 } 2305 break; 2306 case UDP_V6_FLOW: 2307 if (vi->rss_hash_types_saved & VIRTIO_NET_RSS_HASH_TYPE_UDPv6) { 2308 info->data = RXH_IP_SRC | RXH_IP_DST | 2309 RXH_L4_B_0_1 | RXH_L4_B_2_3; 2310 } else if (vi->rss_hash_types_saved & VIRTIO_NET_RSS_HASH_TYPE_IPv6) { 2311 info->data = RXH_IP_SRC | RXH_IP_DST; 2312 } 2313 break; 2314 case IPV4_FLOW: 2315 if (vi->rss_hash_types_saved & VIRTIO_NET_RSS_HASH_TYPE_IPv4) 2316 info->data = RXH_IP_SRC | RXH_IP_DST; 2317 2318 break; 2319 case IPV6_FLOW: 2320 if (vi->rss_hash_types_saved & VIRTIO_NET_RSS_HASH_TYPE_IPv4) 2321 info->data = RXH_IP_SRC | RXH_IP_DST; 2322 2323 break; 2324 default: 2325 info->data = 0; 2326 break; 2327 } 2328 } 2329 2331 { 2332 u64 is_iphash = info->data & (RXH_IP_SRC | RXH_IP_DST); 2333 u64 is_porthash = info->data & (RXH_L4_B_0_1 | RXH_L4_B_2_3); 2334 u32 new_hashtypes = vi->rss_hash_types_saved; 2335 2336 if ((is_iphash && (is_iphash != (RXH_IP_SRC | RXH_IP_DST))) || 2337 (is_porthash && (is_porthash != (RXH_L4_B_0_1 | RXH_L4_B_2_3)))) { 2338 return false; 2339 } 2340 2341 if (!is_iphash && is_porthash) 2342 return false; 2343 2344 switch (info->flow_type) { 2345 case TCP_V4_FLOW: 2346 case UDP_V4_FLOW: 2347 case IPV4_FLOW: 2348 new_hashtypes &= ~VIRTIO_NET_RSS_HASH_TYPE_IPv4; 2349 if (is_iphash) 2350 new_hashtypes |= VIRTIO_NET_RSS_HASH_TYPE_IPv4; 2351 2352 break; 2353 case TCP_V6_FLOW: 2354 case UDP_V6_FLOW: 2355 case IPV6_FLOW: 2356 new_hashtypes &= ~VIRTIO_NET_RSS_HASH_TYPE_IPv6; 2357 if (is_iphash) 2358 new_hashtypes |= VIRTIO_NET_RSS_HASH_TYPE_IPv6; 2359 2360 break; 2361 default: 2362 break; 2363 } 2364 2365 switch (info->flow_type) { 2366 case TCP_V4_FLOW: 2367 new_hashtypes &= ~VIRTIO_NET_RSS_HASH_TYPE_TCPv4; 2368 if (is_porthash) 2369 new_hashtypes |= VIRTIO_NET_RSS_HASH_TYPE_TCPv4; 2370 2371 break; 2372 case UDP_V4_FLOW: 2373 new_hashtypes &= ~VIRTIO_NET_RSS_HASH_TYPE_UDPv4; 2374 if (is_porthash) 2375 new_hashtypes |= VIRTIO_NET_RSS_HASH_TYPE_UDPv4; 2376 2377 break; 2378 case TCP_V6_FLOW: 2379 new_hashtypes &= ~VIRTIO_NET_RSS_HASH_TYPE_TCPv6; 2380 if (is_porthash) 2381 new_hashtypes |= VIRTIO_NET_RSS_HASH_TYPE_TCPv6; 2382 2383 break; 2384 case UDP_V6_FLOW: 2385 new_hashtypes &= ~VIRTIO_NET_RSS_HASH_TYPE_UDPv6; 2386 if (is_porthash) 2387 new_hashtypes |= VIRTIO_NET_RSS_HASH_TYPE_UDPv6; 2388 2389 break; 2390 default: 2391 break; 2392 } 2393 2394 if (new_hashtypes != vi->rss_hash_types_saved) { 2395 vi->rss_hash_types_saved = new_hashtypes; 2396 vi->ctrl->rss.table_info.hash_types = vi->rss_hash_types_saved; 2397 if (vi->dev->features & NETIF_F_RXHASH) 2398 return virtnet_commit_rss_command(vi); 2399 } 2400 2401 return true; 2402 } 2403 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org