Hi Stanislav, I love your patch! Yet something to improve: [auto build test ERROR on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Stanislav-Fomichev/bpf-expose-bpf_-g-s-et_retval-to-more-cgroup-hooks/20220813-030615 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: i386-randconfig-a004 (https://download.01.org/0day-ci/archive/20220814/202208140239.yjzPuMmv-lkp@xxxxxxxxx/config) compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 3329cec2f79185bafd678f310fafadba2a8c76d2) 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/intel-lab-lkp/linux/commit/0429824054f7a843ee976d48432e825e493a0a7e git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Stanislav-Fomichev/bpf-expose-bpf_-g-s-et_retval-to-more-cgroup-hooks/20220813-030615 git checkout 0429824054f7a843ee976d48432e825e493a0a7e # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): >> kernel/bpf/helpers.c:1817:11: error: use of undeclared identifier 'bpf_get_cgroup_classid_curr_proto' return &bpf_get_cgroup_classid_curr_proto; ^ 1 error generated. vim +/bpf_get_cgroup_classid_curr_proto +1817 kernel/bpf/helpers.c 1797 1798 /* Common helpers for cgroup hooks with valid process context. */ 1799 const struct bpf_func_proto * 1800 cgroup_current_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog) 1801 { 1802 switch (func_id) { 1803 #ifdef CONFIG_CGROUPS 1804 case BPF_FUNC_get_current_uid_gid: 1805 return &bpf_get_current_uid_gid_proto; 1806 case BPF_FUNC_get_current_pid_tgid: 1807 return &bpf_get_current_pid_tgid_proto; 1808 case BPF_FUNC_get_current_comm: 1809 return &bpf_get_current_comm_proto; 1810 case BPF_FUNC_get_current_cgroup_id: 1811 return &bpf_get_current_cgroup_id_proto; 1812 case BPF_FUNC_get_current_ancestor_cgroup_id: 1813 return &bpf_get_current_ancestor_cgroup_id_proto; 1814 #endif 1815 #ifdef CONFIG_CGROUP_NET_CLASSID 1816 case BPF_FUNC_get_cgroup_classid: > 1817 return &bpf_get_cgroup_classid_curr_proto; 1818 #endif 1819 default: 1820 return NULL; 1821 } 1822 } 1823 -- 0-DAY CI Kernel Test Service https://01.org/lkp