Hi Joanne, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Joanne-Koong/bpf-Allow-sk_buff-and-xdp_buff-as-valid-kfunc-arg-types/20230128-170947 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20230126233439.3739120-4-joannelkoong%40gmail.com patch subject: [PATCH v8 bpf-next 3/5] bpf: Add skb dynptrs config: ia64-allyesconfig (https://download.01.org/0day-ci/archive/20230128/202301282140.o95DpYWu-lkp@xxxxxxxxx/config) compiler: ia64-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/2581b1dec73f18fa2b7302a1a2ecd788b82f3680 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Joanne-Koong/bpf-Allow-sk_buff-and-xdp_buff-as-valid-kfunc-arg-types/20230128-170947 git checkout 2581b1dec73f18fa2b7302a1a2ecd788b82f3680 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=ia64 SHELL=/bin/bash net/core/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> net/core/filter.c:1866:5: warning: no previous prototype for 'bpf_dynptr_from_skb' [-Wmissing-prototypes] 1866 | int bpf_dynptr_from_skb(struct sk_buff *skb, u64 flags, | ^~~~~~~~~~~~~~~~~~~ vim +/bpf_dynptr_from_skb +1866 net/core/filter.c 1865 > 1866 int bpf_dynptr_from_skb(struct sk_buff *skb, u64 flags, 1867 struct bpf_dynptr_kern *ptr, int is_rdonly) 1868 { 1869 if (flags) { 1870 bpf_dynptr_set_null(ptr); 1871 return -EINVAL; 1872 } 1873 1874 bpf_dynptr_init(ptr, skb, BPF_DYNPTR_TYPE_SKB, 0, skb->len); 1875 1876 if (is_rdonly) 1877 bpf_dynptr_set_rdonly(ptr); 1878 1879 return 0; 1880 } 1881 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
