Hi Daniel, Thank you for the patch! Yet something to improve: [auto build test ERROR on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Daniel-Xu/bpf-Remove-duplicate-PTR_TO_BTF_ID-RO-check/20220820-082411 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: nios2-randconfig-r005-20220820 (https://download.01.org/0day-ci/archive/20220820/202208201201.h5mCZpcU-lkp@xxxxxxxxx/config) compiler: nios2-linux-gcc (GCC) 12.1.0 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/intel-lab-lkp/linux/commit/20062077235a94dd0b856204b6dbddefe8342f01 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Daniel-Xu/bpf-Remove-duplicate-PTR_TO_BTF_ID-RO-check/20220820-082411 git checkout 20062077235a94dd0b856204b6dbddefe8342f01 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=nios2 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 >>): nios2-linux-ld: net/core/filter.o: in function `tc_cls_act_btf_struct_access': filter.c:(.text+0xd54): undefined reference to `nf_conntrack_btf_struct_access' >> nios2-linux-ld: filter.c:(.text+0xd58): undefined reference to `nf_conntrack_btf_struct_access' -- 0-DAY CI Kernel Test Service https://01.org/lkp
