tree: https://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux.git mlx5-queue head: 46fb2d6328c851496c3bcc5e50a1e58786c83acb commit: 1a0dafe601fbde2b5de8bfd64bfbdd0cd173d229 [9/13] bpf: Add a helper to issue timestamp cookies in XDP config: i386-randconfig-a003-20211017 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 746dd6a700931988dd9021d3d04718f1929885a5) 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/saeed/linux.git/commit/?i... git remote add saeed https://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux.git git fetch --no-tags saeed mlx5-queue git checkout 1a0dafe601fbde2b5de8bfd64bfbdd0cd173d229 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386 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 >>): err_out: ^~~~~~~~ 1 warning generated. vim +/err_out +7426 net/core/filter.c 7405 7406 BPF_CALL_4(bpf_tcp_raw_gen_tscookie, struct tcphdr *, th, u32, th_len, 7407 __be32 *, tsopt, u32, tsopt_len) 7408 { 7409 int err; 7410 7411 #ifdef CONFIG_SYN_COOKIES 7412 if (tsopt_len != sizeof(u64)) { 7413 err = -EINVAL; 7414 goto err_out; 7415 } 7416 7417 if (!cookie_init_timestamp_raw(th, &tsopt[0], &tsopt[1])) { 7418 err = -ENOENT; 7419 goto err_out; 7420 } 7421 7422 return 0; 7423 #else 7424 err = -EOPNOTSUPP; 7425 #endif 7427 memset(tsopt, 0, tsopt_len); 7428 return err; 7429 } 7430 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org