Hi Vlad, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 671176b0016c80b3943cb5387312c886aba3308d commit: 0d9f96471493d5483d116c137693f03604332a04 [8483/10581] net/mlx5e: Extract tc tunnel encap/decap code to dedicated file config: s390-defconfig (attached as .config) compiler: s390-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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commi... git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 0d9f96471493d5483d116c137693f03604332a04 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=s390 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 >>): In file included from drivers/net/ethernet/mellanox/mlx5/core/en_tc.h:40, from drivers/net/ethernet/mellanox/mlx5/core/en_main.c:45: 24 | enum mlx5_flow_match_level match_level; | ^~~~~~~~~~~ drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.h:27:26: warning: 'struct mlx5e_encap_entry' declared inside parameter list will not be visible outside of this definition or declaration 27 | int (*calc_hlen)(struct mlx5e_encap_entry *e); | ^~~~~~~~~~~~~~~~~ drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.h:30:18: warning: 'struct mlx5e_encap_entry' declared inside parameter list will not be visible outside of this definition or declaration 30 | struct mlx5e_encap_entry *e, | ^~~~~~~~~~~~~~~~~ drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.h:34:15: warning: 'struct mlx5e_encap_entry' declared inside parameter list will not be visible outside of this definition or declaration 34 | struct mlx5e_encap_entry *e); | ^~~~~~~~~~~~~~~~~ drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.h:56:13: warning: 'struct mlx5e_encap_entry' declared inside parameter list will not be visible outside of this definition or declaration 56 | struct mlx5e_encap_entry *e, | ^~~~~~~~~~~~~~~~~ drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.h:61:16: warning: 'struct mlx5e_encap_entry' declared inside parameter list will not be visible outside of this definition or declaration 61 | struct mlx5e_encap_entry *e); | ^~~~~~~~~~~~~~~~~ drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.h:66:16: warning: 'struct mlx5e_encap_entry' declared inside parameter list will not be visible outside of this definition or declaration 66 | struct mlx5e_encap_entry *e); | ^~~~~~~~~~~~~~~~~ vim +/match_level +24 drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.h 101f4de9dd521c Oz Shlomo 2018-12-02 21 d386939a327d2f Yevgeny Kliteynik 2019-04-14 22 struct mlx5e_tc_tunnel { d386939a327d2f Yevgeny Kliteynik 2019-04-14 23 int tunnel_type; d386939a327d2f Yevgeny Kliteynik 2019-04-14 @24 enum mlx5_flow_match_level match_level; d386939a327d2f Yevgeny Kliteynik 2019-04-14 25 d386939a327d2f Yevgeny Kliteynik 2019-04-14 26 bool (*can_offload)(struct mlx5e_priv *priv); d386939a327d2f Yevgeny Kliteynik 2019-04-14 27 int (*calc_hlen)(struct mlx5e_encap_entry *e); d386939a327d2f Yevgeny Kliteynik 2019-04-14 28 int (*init_encap_attr)(struct net_device *tunnel_dev, d386939a327d2f Yevgeny Kliteynik 2019-04-14 29 struct mlx5e_priv *priv, d386939a327d2f Yevgeny Kliteynik 2019-04-14 30 struct mlx5e_encap_entry *e, d386939a327d2f Yevgeny Kliteynik 2019-04-14 31 struct netlink_ext_ack *extack); d386939a327d2f Yevgeny Kliteynik 2019-04-14 32 int (*generate_ip_tun_hdr)(char buf[], d386939a327d2f Yevgeny Kliteynik 2019-04-14 33 __u8 *ip_proto, d386939a327d2f Yevgeny Kliteynik 2019-04-14 34 struct mlx5e_encap_entry *e); d386939a327d2f Yevgeny Kliteynik 2019-04-14 35 int (*parse_udp_ports)(struct mlx5e_priv *priv, d386939a327d2f Yevgeny Kliteynik 2019-04-14 36 struct mlx5_flow_spec *spec, f9e30088d20016 Pablo Neira Ayuso 2019-07-09 37 struct flow_cls_offload *f, d386939a327d2f Yevgeny Kliteynik 2019-04-14 38 void *headers_c, d386939a327d2f Yevgeny Kliteynik 2019-04-14 39 void *headers_v); d386939a327d2f Yevgeny Kliteynik 2019-04-14 40 int (*parse_tunnel)(struct mlx5e_priv *priv, d386939a327d2f Yevgeny Kliteynik 2019-04-14 41 struct mlx5_flow_spec *spec, f9e30088d20016 Pablo Neira Ayuso 2019-07-09 42 struct flow_cls_offload *f, d386939a327d2f Yevgeny Kliteynik 2019-04-14 43 void *headers_c, d386939a327d2f Yevgeny Kliteynik 2019-04-14 44 void *headers_v); d386939a327d2f Yevgeny Kliteynik 2019-04-14 45 }; d386939a327d2f Yevgeny Kliteynik 2019-04-14 46 :::::: The code at line 24 was first introduced by commit :::::: d386939a327d2f1c9e918ee843087124eee0efda net/mlx5e: Rearrange tc tunnel code in a modular way :::::: TO: Yevgeny Kliteynik <kliteyn(a)mellanox.com&gt; :::::: CC: Saeed Mahameed <saeedm(a)mellanox.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org