Hi Jason, kernel test robot noticed the following build errors: [auto build test ERROR on net-next/main] url: https://github.com/intel-lab-lkp/linux/commits/Jason-Xing/net-timestamp-reorganize-in-skb_tstamp_tx_output/20241028-192036 base: net-next/main patch link: https://lore.kernel.org/r/20241028110535.82999-5-kerneljasonxing%40gmail.com patch subject: [PATCH net-next v3 04/14] net-timestamp: introduce TS_SCHED_OPT_CB to generate dev xmit timestamp config: arm64-randconfig-001-20241029 (https://download.01.org/0day-ci/archive/20241029/202410290852.PLcWZ1Yo-lkp@xxxxxxxxx/config) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241029/202410290852.PLcWZ1Yo-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/202410290852.PLcWZ1Yo-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> net/core/skbuff.c:5640:2: error: call to undeclared function 'BPF_CGROUP_RUN_PROG_SOCK_OPS_SK'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration] 5640 | BPF_CGROUP_RUN_PROG_SOCK_OPS_SK(&sock_ops, sk); | ^ 1 error generated. vim +/BPF_CGROUP_RUN_PROG_SOCK_OPS_SK +5640 net/core/skbuff.c 5624 5625 static void timestamp_call_bpf(struct sock *sk, int op, u32 nargs, u32 *args) 5626 { 5627 struct bpf_sock_ops_kern sock_ops; 5628 5629 memset(&sock_ops, 0, offsetof(struct bpf_sock_ops_kern, temp)); 5630 if (sk_fullsock(sk)) { 5631 sock_ops.is_fullsock = 1; 5632 sock_owned_by_me(sk); 5633 } 5634 5635 sock_ops.sk = sk; 5636 sock_ops.op = op; 5637 if (nargs > 0) 5638 memcpy(sock_ops.args, args, nargs * sizeof(*args)); 5639 > 5640 BPF_CGROUP_RUN_PROG_SOCK_OPS_SK(&sock_ops, sk); 5641 } 5642 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki