Hi Kuniyuki, kernel test robot noticed the following build errors: [auto build test ERROR on bpf-next/net] url: https://github.com/intel-lab-lkp/linux/commits/Kuniyuki-Iwashima/tcp-Save-lock_sock-for-memcg-in-inet_csk_accept/20250823-062322 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git net patch link: https://lore.kernel.org/r/20250822221846.744252-7-kuniyu%40google.com patch subject: [PATCH v1 bpf-next/net 6/8] bpf: Introduce SK_BPF_MEMCG_FLAGS and SK_BPF_MEMCG_SOCK_ISOLATED. config: arc-randconfig-002-20250823 (https://download.01.org/0day-ci/archive/20250823/202508232331.rxOqu50j-lkp@xxxxxxxxx/config) compiler: arc-linux-gcc (GCC) 12.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250823/202508232331.rxOqu50j-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202508232331.rxOqu50j-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): net/core/filter.c: In function 'sk_bpf_set_get_memcg_flags': >> net/core/filter.c:5290:9: error: implicit declaration of function 'mem_cgroup_sk_set_flags'; did you mean 'mem_cgroup_sk_get_flags'? [-Werror=implicit-function-declaration] 5290 | mem_cgroup_sk_set_flags(sk, *optval); | ^~~~~~~~~~~~~~~~~~~~~~~ | mem_cgroup_sk_get_flags cc1: some warnings being treated as errors vim +5290 net/core/filter.c 5269 5270 static int sk_bpf_set_get_memcg_flags(struct sock *sk, int *optval, bool getopt) 5271 { 5272 if (!mem_cgroup_sk_enabled(sk)) 5273 return -EOPNOTSUPP; 5274 5275 if (getopt) { 5276 *optval = mem_cgroup_sk_get_flags(sk); 5277 return 0; 5278 } 5279 5280 /* Don't allow once sk has been published to userspace. 5281 * INET_CREATE is called without lock_sock() but with sk_socket 5282 * INET_ACCEPT is called with lock_sock() but without sk_socket 5283 */ 5284 if (sock_owned_by_user_nocheck(sk) && sk->sk_socket) 5285 return -EBUSY; 5286 5287 if (*optval <= 0 || *optval >= SK_BPF_MEMCG_FLAG_MAX) 5288 return -EINVAL; 5289 > 5290 mem_cgroup_sk_set_flags(sk, *optval); 5291 5292 return 0; 5293 } 5294 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
