Hi Marcin, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on net-next/master] url: https://github.com/0day-ci/linux/commits/Marcin-Szycik/ice-GTP-support-in... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git 41414c9bdbb87cc5fbeee7dfc33137a96710fcac config: arm64-randconfig-s032-20220208 (https://download.01.org/0day-ci/archive/20220209/202202090710.dTUDKxN3-lk...) compiler: aarch64-linux-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://github.com/0day-ci/linux/commit/926dc9532fd0b964087f8d72f0331efe7... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Marcin-Szycik/ice-GTP-support-in-switchdev/20220205-005556 git checkout 926dc9532fd0b964087f8d72f0331efe70cd25bc # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/net/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/net/gtp.c:868:41: sparse: expected restricted __be16 [usertype] local_udp_port drivers/net/gtp.c:868:41: sparse: got unsigned short [usertype] drivers/net/gtp.c:870:43: sparse: sparse: cast to restricted __be16 drivers/net/gtp.c:870:41: sparse: sparse: incorrect type in assignment (different base types) @@ expected restricted __be16 [usertype] local_udp_port @@ got unsigned short [usertype] @@ drivers/net/gtp.c:870:41: sparse: expected restricted __be16 [usertype] local_udp_port drivers/net/gtp.c:870:41: sparse: got unsigned short [usertype] vim +868 drivers/net/gtp.c 855 856 static struct sock *gtp_encap_create_sock(int type, struct gtp_dev *gtp) 857 { 858 struct udp_tunnel_sock_cfg tuncfg = {}; 859 struct udp_port_cfg udp_conf = { 860 .local_ip.s_addr = htonl(INADDR_ANY), 861 .family = AF_INET, 862 }; 863 struct net *net = gtp->net; 864 struct socket *sock; 865 int err; 866 867 if (type == UDP_ENCAP_GTP0) 869 else if (type == UDP_ENCAP_GTP1U) 870 udp_conf.local_udp_port = ntohs(GTP1U_PORT); 871 else 872 return ERR_PTR(-EINVAL); 873 874 err = udp_sock_create(net, &udp_conf, &sock); 875 if (err) 876 return ERR_PTR(err); 877 878 tuncfg.sk_user_data = gtp; 879 tuncfg.encap_type = type; 880 tuncfg.encap_rcv = gtp_encap_recv; 881 tuncfg.encap_destroy = NULL; 882 883 setup_udp_tunnel_sock(net, sock, &tuncfg); 884 885 return sock->sk; 886 } 887 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org