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

[kernel test robot]

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/?id=aa127963f1cab2b93c74c9b128a84610203fb674
        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@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> lib/crypto/curve25519-selftest.c:1283:13: warning: no previous prototype for 'curve25519_selftest' [-Wmissing-prototypes]
    1283 | bool __init curve25519_selftest(void)
         |             ^~~~~~~~~~~~~~~~~~~

vim +/curve25519_selftest +1283 lib/crypto/curve25519-selftest.c

  1282	
> 1283	bool __init curve25519_selftest(void)

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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