tree: git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git master head: 4e348e961395297bb17f101cc63bc133d8a348e9 commit: a35948847a1e0bf875f580f821cb871ce16d4c60 [2294/2300] headers/deps: time: Optimize dependencies, remove inclusion config: mips-randconfig-r034-20220108 (https://download.01.org/0day-ci/archive/20220109/202201090259.KZeo3bGb-lkp@intel.com/config) compiler: mipsel-linux-gcc (GCC) 11.2.0 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/mingo/tip.git/commit/?id=a35948847a1e0bf875f580f821cb871ce16d4c60 git remote add mingo-tip git://git.kernel.org/pub/scm/linux/kernel/git/mingo/tip.git git fetch --no-tags mingo-tip master git checkout a35948847a1e0bf875f580f821cb871ce16d4c60 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=mips SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): arch/mips/crypto/chacha-glue.c: In function 'chacha_mips_stream_xor': >> arch/mips/crypto/chacha-glue.c:45:34: error: implicit declaration of function 'round_down' [-Werror=implicit-function-declaration] 45 | nbytes = round_down(nbytes, walk.stride); | ^~~~~~~~~~ cc1: some warnings being treated as errors vim +/round_down +45 arch/mips/crypto/chacha-glue.c 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 29 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 30 static int chacha_mips_stream_xor(struct skcipher_request *req, 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 31 const struct chacha_ctx *ctx, const u8 *iv) 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 32 { 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 33 struct skcipher_walk walk; 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 34 u32 state[16]; 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 35 int err; 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 36 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 37 err = skcipher_walk_virt(&walk, req, false); 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 38 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 39 chacha_init_generic(state, ctx->key, iv); 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 40 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 41 while (walk.nbytes > 0) { 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 42 unsigned int nbytes = walk.nbytes; 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 43 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 44 if (nbytes < walk.total) 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 @45 nbytes = round_down(nbytes, walk.stride); 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 46 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 47 chacha_crypt(state, walk.dst.virt.addr, walk.src.virt.addr, 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 48 nbytes, ctx->nrounds); 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 49 err = skcipher_walk_done(&walk, walk.nbytes - nbytes); 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 50 } 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 51 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 52 return err; 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 53 } 3a2f58f3ba4f6f Ard Biesheuvel 2019-11-08 54 :::::: The code at line 45 was first introduced by commit :::::: 3a2f58f3ba4f6f44e33d1a48240d5eadb882cb59 crypto: mips/chacha - wire up accelerated 32r2 code from Zinc :::::: TO: Ard Biesheuvel :::::: CC: Herbert Xu --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org