Hi Nikolay, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on linus/master] [also build test ERROR on v5.8-rc4 next-20200708] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Nikolay-Aleksandrov/net-bridge-m... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git dcde237b9b0eb1d19306e6f48c0a4e058907619f config: parisc-randconfig-r004-20200709 (attached as .config) compiler: hppa-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=parisc 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 >>): net/bridge/br_device.c: In function 'br_dev_xmit': 94 | br_multicast_querier_exists(br, eth_hdr(skb), mdst)) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from net/bridge/br_device.c:19: net/bridge/br_private.h:897:20: note: declared here 897 | static inline bool br_multicast_querier_exists(struct net_bridge *br, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ -- net/bridge/br_input.c: In function 'br_handle_frame_finish': 137 | br_multicast_querier_exists(br, eth_hdr(skb), mdst)) { | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from net/bridge/br_input.c:23: net/bridge/br_private.h:897:20: note: declared here 897 | static inline bool br_multicast_querier_exists(struct net_bridge *br, | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/br_multicast_querier_exists +94 net/bridge/br_device.c 26 27 /* net device transmit always called with BH disabled */ 28 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev) 29 { 30 struct net_bridge *br = netdev_priv(dev); 31 struct net_bridge_fdb_entry *dst; 32 struct net_bridge_mdb_entry *mdst; 33 struct pcpu_sw_netstats *brstats = this_cpu_ptr(br->stats); 34 const struct nf_br_ops *nf_ops; 35 u8 state = BR_STATE_FORWARDING; 36 const unsigned char *dest; 37 u16 vid = 0; 38 39 rcu_read_lock(); 40 nf_ops = rcu_dereference(nf_br_ops); 41 if (nf_ops && nf_ops->br_dev_xmit_hook(skb)) { 42 rcu_read_unlock(); 43 return NETDEV_TX_OK; 44 } 45 46 u64_stats_update_begin(&brstats->syncp); 47 brstats->tx_packets++; 48 brstats->tx_bytes += skb->len; 49 u64_stats_update_end(&brstats->syncp); 50 51 br_switchdev_frame_unmark(skb); 52 BR_INPUT_SKB_CB(skb)->brdev = dev; 53 BR_INPUT_SKB_CB(skb)->frag_max_size = 0; 54 55 skb_reset_mac_header(skb); 56 skb_pull(skb, ETH_HLEN); 57 58 if (!br_allowed_ingress(br, br_vlan_group_rcu(br), skb, &vid, &state)) 59 goto out; 60 61 if (IS_ENABLED(CONFIG_INET) && 62 (eth_hdr(skb)->h_proto == htons(ETH_P_ARP) || 63 eth_hdr(skb)->h_proto == htons(ETH_P_RARP)) && 64 br_opt_get(br, BROPT_NEIGH_SUPPRESS_ENABLED)) { 65 br_do_proxy_suppress_arp(skb, br, vid, NULL); 66 } else if (IS_ENABLED(CONFIG_IPV6) && 67 skb->protocol == htons(ETH_P_IPV6) && 68 br_opt_get(br, BROPT_NEIGH_SUPPRESS_ENABLED) && 69 pskb_may_pull(skb, sizeof(struct ipv6hdr) + 70 sizeof(struct nd_msg)) && 71 ipv6_hdr(skb)->nexthdr == IPPROTO_ICMPV6) { 72 struct nd_msg *msg, _msg; 73 74 msg = br_is_nd_neigh_msg(skb, &_msg); 75 if (msg) 76 br_do_suppress_nd(skb, br, vid, NULL, msg); 77 } 78 79 dest = eth_hdr(skb)->h_dest; 80 if (is_broadcast_ether_addr(dest)) { 81 br_flood(br, skb, BR_PKT_BROADCAST, false, true); 82 } else if (is_multicast_ether_addr(dest)) { 83 if (unlikely(netpoll_tx_running(dev))) { 84 br_flood(br, skb, BR_PKT_MULTICAST, false, true); 85 goto out; 86 } 87 if (br_multicast_rcv(br, NULL, skb, vid)) { 88 kfree_skb(skb); 89 goto out; 90 } 91 92 mdst = br_mdb_get(br, skb, vid); 93 if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) && 95 br_multicast_flood(mdst, skb, false, true); 96 else 97 br_flood(br, skb, BR_PKT_MULTICAST, false, true); 98 } else if ((dst = br_fdb_find_rcu(br, dest, vid)) != NULL) { 99 br_forward(dst->dst, skb, false, true); 100 } else { 101 br_flood(br, skb, BR_PKT_UNICAST, false, true); 102 } 103 out: 104 rcu_read_unlock(); 105 return NETDEV_TX_OK; 106 } 107 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org