Hi Xuan, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on bpf-next/master] url: https://github.com/0day-ci/linux/commits/Xuan-Zhuo/xsk-support-AF_PACKET/20210528-140828 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master config: x86_64-randconfig-a013-20210528 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 6505c630407c5feec818f0bb1c284f9eeebf2071) 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 # install x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # https://github.com/0day-ci/linux/commit/814526a7683da5d39bbe21f94f18df3bb85a07e7 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Xuan-Zhuo/xsk-support-AF_PACKET/20210528-140828 git checkout 814526a7683da5d39bbe21f94f18df3bb85a07e7 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): In file included from net/packet/af_packet.c:93: In file included from net/packet/internal.h:6: >> include/net/xdp_sock.h:106:6: warning: no previous prototype for function 'xsk_add_pack' [-Wmissing-prototypes] void xsk_add_pack(struct xsk_packet *xpt) ^ include/net/xdp_sock.h:106:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void xsk_add_pack(struct xsk_packet *xpt) ^ static >> include/net/xdp_sock.h:110:6: warning: no previous prototype for function '__xsk_remove_pack' [-Wmissing-prototypes] void __xsk_remove_pack(struct xsk_packet *xpt) ^ include/net/xdp_sock.h:110:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __xsk_remove_pack(struct xsk_packet *xpt) ^ static 2 warnings generated. vim +/xsk_add_pack +106 include/net/xdp_sock.h 105 > 106 void xsk_add_pack(struct xsk_packet *xpt) 107 { 108 } 109 > 110 void __xsk_remove_pack(struct xsk_packet *xpt) 111 { 112 } 113 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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