Hi Joanne, 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/Joanne-Koong/Add-skb-xdp-dynptrs/20220812-070634 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: riscv-randconfig-r042-20220812 (https://download.01.org/0day-ci/archive/20220812/202208122032.0CZYkZY8-lkp@xxxxxxxxx/config) compiler: riscv32-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/20947f78c1a22c16604514fe2b7c222b77f8939b git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Joanne-Koong/Add-skb-xdp-dynptrs/20220812-070634 git checkout 20947f78c1a22c16604514fe2b7c222b77f8939b # 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=riscv 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 >>): riscv32-linux-ld: net/core/filter.o: in function `.L1284': filter.c:(.text+0x5606): undefined reference to `bpf_dynptr_init' riscv32-linux-ld: net/core/filter.o: in function `.L1279': filter.c:(.text+0x561e): undefined reference to `bpf_dynptr_set_null' riscv32-linux-ld: net/core/filter.o: in function `.L1298': filter.c:(.text+0x566c): undefined reference to `bpf_dynptr_init' riscv32-linux-ld: net/core/filter.o: in function `.L1304': filter.c:(.text+0x568e): undefined reference to `bpf_dynptr_set_rdonly' >> riscv32-linux-ld: filter.c:(.text+0x569a): undefined reference to `bpf_dynptr_set_null' -- 0-DAY CI Kernel Test Service https://01.org/lkp