Hi, kernel test robot noticed the following build warnings: [auto build test WARNING on trondmy-nfs/linux-next] [also build test WARNING on net/main net-next/main linus/master linux-nvme/for-next v6.17-rc1 next-20250815] [cannot apply to horms-ipvs/master] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/alistair23-gmail-com/net-handshake-Store-the-key-serial-number-on-completion/20250815-130804 base: git://git.linux-nfs.org/projects/trondmy/linux-nfs.git linux-next patch link: https://lore.kernel.org/r/20250815050210.1518439-3-alistair.francis%40wdc.com patch subject: [PATCH 2/8] net/handshake: Make handshake_req_cancel public config: arm-mps2_defconfig (https://download.01.org/0day-ci/archive/20250816/202508160354.iNoLUr4h-lkp@xxxxxxxxx/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 93d24b6b7b148c47a2fa228a4ef31524fa1d9f3f) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250816/202508160354.iNoLUr4h-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/202508160354.iNoLUr4h-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> net/handshake/request.c:312:6: warning: no previous prototype for function 'handshake_req_cancel' [-Wmissing-prototypes] 312 | bool handshake_req_cancel(struct sock *sk) | ^ net/handshake/request.c:312:1: note: declare 'static' if the function is not intended to be used outside of this translation unit 312 | bool handshake_req_cancel(struct sock *sk) | ^ | static 1 warning generated. vim +/handshake_req_cancel +312 net/handshake/request.c 3b3009ea8abb71 Chuck Lever 2023-04-17 300 3b3009ea8abb71 Chuck Lever 2023-04-17 301 /** 3b3009ea8abb71 Chuck Lever 2023-04-17 302 * handshake_req_cancel - Cancel an in-progress handshake 3b3009ea8abb71 Chuck Lever 2023-04-17 303 * @sk: socket on which there is an ongoing handshake 3b3009ea8abb71 Chuck Lever 2023-04-17 304 * 3b3009ea8abb71 Chuck Lever 2023-04-17 305 * Request cancellation races with request completion. To determine 3b3009ea8abb71 Chuck Lever 2023-04-17 306 * who won, callers examine the return value from this function. 3b3009ea8abb71 Chuck Lever 2023-04-17 307 * 3b3009ea8abb71 Chuck Lever 2023-04-17 308 * Return values: 3b3009ea8abb71 Chuck Lever 2023-04-17 309 * %true - Uncompleted handshake request was canceled 3b3009ea8abb71 Chuck Lever 2023-04-17 310 * %false - Handshake request already completed or not found 3b3009ea8abb71 Chuck Lever 2023-04-17 311 */ 3b3009ea8abb71 Chuck Lever 2023-04-17 @312 bool handshake_req_cancel(struct sock *sk) -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki