[kbuild-all] lib/crypto/curve25519-selftest.c:1283:13: warning: no previous prototype for 'curve25519_selftest'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 585e5b17b92dead8a3aca4e3c9876fbca5f7e0ba commit: aa127963f1cab2b93c74c9b128a84610203fb674 crypto: lib/curve25519 - re-add selftests date: 11 months ago config: nios2-randconfig-r033-20201113 (attached as .config) compiler: nios2-linux-gcc (GCC) 9.3.0 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout aa127963f1cab2b93c74c9b128a84610203fb674 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=nios2 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 >>): 1283 | bool __init curve25519_selftest(void) | ^~~~~~~~~~~~~~~~~~~ vim +/curve25519_selftest +1283 lib/crypto/curve25519-selftest.c 1282 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org