[kbuild-all] [dsahern-linux:nvme-tcp-offload 6/15] drivers/nvme/host/tcp.c:462:6: warning: no previous prototype for function 'nvme_tcp_ddp_teardown_done'

tree: https://github.com/dsahern/linux nvme-tcp-offload head: b9ae3391dc24a401030b31ad5363e0471ae386e0 commit: baa2dd14401e2b226927dcaf1d0b3cb2207b1901 [6/15] nvme-tcp: Add DDP data-path config: x86_64-randconfig-a005-20201209 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 1968804ac726e7674d5de22bc2204b45857da344) 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/dsahern/linux/commit/baa2dd14401e2b226927dcaf1d0b3cb22... git remote add dsahern-linux https://github.com/dsahern/linux git fetch --no-tags dsahern-linux nvme-tcp-offload git checkout baa2dd14401e2b226927dcaf1d0b3cb2207b1901 # 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(a)intel.com&gt; All warnings (new ones prefixed by >>): void nvme_tcp_ddp_teardown_done(void *ddp_ctx) ^ drivers/nvme/host/tcp.c:462:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void nvme_tcp_ddp_teardown_done(void *ddp_ctx) ^ static drivers/nvme/host/tcp.c:486:6: warning: no previous prototype for function 'nvme_tcp_resync_request' [-Wmissing-prototypes] bool nvme_tcp_resync_request(struct sock *sk, u32 seq, u32 flags) ^ drivers/nvme/host/tcp.c:486:1: note: declare 'static' if the function is not intended to be used outside of this translation unit bool nvme_tcp_resync_request(struct sock *sk, u32 seq, u32 flags) ^ static drivers/nvme/host/tcp.c:219:22: warning: unused function 'nvme_tcp_req_offset' [-Wunused-function] static inline size_t nvme_tcp_req_offset(struct nvme_tcp_request *req) ^ 3 warnings generated. vim +/nvme_tcp_ddp_teardown_done +462 drivers/nvme/host/tcp.c 461 463 {} 464 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org