tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: e3f80d3eae76c3557b3c9b5938ad01c0e6cf25ec commit: 0dd061a6a115f25132989cbd591a25afb2dee086 [9571/12208] bpf: Add update_socket_protocol hook config: i386-randconfig-r026-20230823 (https://download.01.org/0day-ci/archive/20230824/202308241150.LquDYwGT-lkp@xxxxxxxxx/config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: (https://download.01.org/0day-ci/archive/20230824/202308241150.LquDYwGT-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202308241150.LquDYwGT-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> net/socket.c:1676:21: warning: no previous declaration for 'update_socket_protocol' [-Wmissing-declarations] __weak noinline int update_socket_protocol(int family, int type, int protocol) ^~~~~~~~~~~~~~~~~~~~~~ vim +/update_socket_protocol +1676 net/socket.c 1659 1660 /* A hook for bpf progs to attach to and update socket protocol. 1661 * 1662 * A static noinline declaration here could cause the compiler to 1663 * optimize away the function. A global noinline declaration will 1664 * keep the definition, but may optimize away the callsite. 1665 * Therefore, __weak is needed to ensure that the call is still 1666 * emitted, by telling the compiler that we don't know what the 1667 * function might eventually be. 1668 * 1669 * __diag_* below are needed to dismiss the missing prototype warning. 1670 */ 1671 1672 __diag_push(); 1673 __diag_ignore_all("-Wmissing-prototypes", 1674 "A fmod_ret entry point for BPF programs"); 1675 > 1676 __weak noinline int update_socket_protocol(int family, int type, int protocol) 1677 { 1678 return protocol; 1679 } 1680 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
