Hi Leonard, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on 3a62c333497b164868fdcd241842a1dd4e331825] url: https://github.com/0day-ci/linux/commits/Leonard-Crestez/tcp-Initial-supp... base: 3a62c333497b164868fdcd241842a1dd4e331825 config: arc-allyesconfig (attached as .config) compiler: arceb-elf-gcc (GCC) 11.2.0 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://github.com/0day-ci/linux/commit/ed738605a859a09457d1ab0570d8cf8bc... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Leonard-Crestez/tcp-Initial-support-for-RFC5925-auth-option/20210825-053714 git checkout ed738605a859a09457d1ab0570d8cf8bcfe3f536 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 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 >>): 208 | struct tcp_authopt_key_info *tcp_authopt_lookup_send(struct tcp_authopt_info *info, | ^~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/rbtree.h:22, from include/linux/mm_types.h:10, from include/linux/mmzone.h:21, from include/linux/gfp.h:6, from include/linux/mm.h:10, from include/linux/bvec.h:14, from include/linux/skbuff.h:17, from include/linux/tcp.h:17, from include/net/tcp.h:20, from net/ipv4/tcp_authopt.c:4: net/ipv4/tcp_authopt.c: In function 'tcp_authopt_clone_keys': net/ipv4/tcp_authopt.c:468:87: error: 'sk' undeclared (first use in this function); did you mean 's8'? 468 | hlist_for_each_entry_rcu(old_key, &old_info->head, node, lockdep_sock_is_held(sk)) { | ^~ include/linux/rcupdate.h:318:22: note: in definition of macro 'RCU_LOCKDEP_WARN' 318 | if ((c) && debug_lockdep_rcu_enabled() && !__warned) { \ | ^ include/linux/rculist.h:706:14: note: in expansion of macro '__list_check_rcu' 706 | for (__list_check_rcu(dummy, ## cond, 0), \ | ^~~~~~~~~~~~~~~~ net/ipv4/tcp_authopt.c:468:9: note: in expansion of macro 'hlist_for_each_entry_rcu' 468 | hlist_for_each_entry_rcu(old_key, &old_info->head, node, lockdep_sock_is_held(sk)) { | ^~~~~~~~~~~~~~~~~~~~~~~~ net/ipv4/tcp_authopt.c:468:87: note: each undeclared identifier is reported only once for each function it appears in 468 | hlist_for_each_entry_rcu(old_key, &old_info->head, node, lockdep_sock_is_held(sk)) { | ^~ include/linux/rcupdate.h:318:22: note: in definition of macro 'RCU_LOCKDEP_WARN' 318 | if ((c) && debug_lockdep_rcu_enabled() && !__warned) { \ | ^ include/linux/rculist.h:706:14: note: in expansion of macro '__list_check_rcu' 706 | for (__list_check_rcu(dummy, ## cond, 0), \ | ^~~~~~~~~~~~~~~~ net/ipv4/tcp_authopt.c:468:9: note: in expansion of macro 'hlist_for_each_entry_rcu' 468 | hlist_for_each_entry_rcu(old_key, &old_info->head, node, lockdep_sock_is_held(sk)) { | ^~~~~~~~~~~~~~~~~~~~~~~~ net/ipv4/tcp_authopt.c: In function 'tcp_authopt_shash_traffic_key': net/ipv4/tcp_authopt.c:542:42: warning: variable 'daddr' set but not used [-Wunused-but-set-variable] 542 | struct in6_addr *daddr; | ^~~~~ net/ipv4/tcp_authopt.c:541:42: warning: variable 'saddr' set but not used [-Wunused-but-set-variable] 541 | struct in6_addr *saddr; | ^~~~~ net/ipv4/tcp_authopt.c: At top level: net/ipv4/tcp_authopt.c:940:5: warning: no previous prototype for '__tcp_authopt_calc_mac' [-Wmissing-prototypes] 940 | int __tcp_authopt_calc_mac(struct sock *sk, | ^~~~~~~~~~~~~~~~~~~~~~ vim +/tcp_authopt_lookup_send +208 net/ipv4/tcp_authopt.c 207 209 const struct sock *addr_sk, 210 int send_id) 211 { 212 struct tcp_authopt_key_info *result = NULL; 213 struct tcp_authopt_key_info *key; 214 215 hlist_for_each_entry_rcu(key, &info->head, node, 0) { 216 if (send_id >= 0 && key->send_id != send_id) 217 continue; 218 if (key->flags & TCP_AUTHOPT_KEY_ADDR_BIND) { 219 if (addr_sk->sk_family == AF_INET) { 220 struct sockaddr_in *key_addr = (struct sockaddr_in *)&key->addr; 221 const struct in_addr *daddr = 222 (const struct in_addr *)&addr_sk->sk_daddr; 223 224 if (WARN_ON(key_addr->sin_family != AF_INET)) 225 continue; 226 if (memcmp(daddr, &key_addr->sin_addr, sizeof(*daddr))) 227 continue; 228 } 229 if (addr_sk->sk_family == AF_INET6) { 230 struct sockaddr_in6 *key_addr = (struct sockaddr_in6 *)&key->addr; 231 const struct in6_addr *daddr = &addr_sk->sk_v6_daddr; 232 233 if (WARN_ON(key_addr->sin6_family != AF_INET6)) 234 continue; 235 if (memcmp(daddr, &key_addr->sin6_addr, sizeof(*daddr))) 236 continue; 237 } 238 } 239 if (result && net_ratelimit()) 240 pr_warn("ambiguous tcp authentication keys configured for send\n"); 241 result = key; 242 } 243 244 return result; 245 } 246 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org