Hi Eric, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-stable.git linux-5.4.y head: ec154a8f0cb674ec265a28660388967f07edeac1 commit: cf24f27f1874da8e52e7f438e39e735d781152d0 [400/408] crypto: lib/sha256 - add sha256() function config: sparc-randconfig-c003-20201113 (attached as .config) compiler: sparc64-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/jaegeuk/f2fs-stable.git/c... git remote add f2fs-stable https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-stable.git git fetch --no-tags f2fs-stable linux-5.4.y git checkout cf24f27f1874da8e52e7f438e39e735d781152d0 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sparc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): 160 | static struct shash_alg sha256 = { | ^~~~~~ In file included from arch/sparc/crypto/sha256_glue.c:20: include/crypto/sha.h:140:6: note: previous declaration of 'sha256' was here 140 | void sha256(const u8 *data, unsigned int len, u8 *out); | ^~~~~~ In file included from arch/sparc/crypto/sha256_glue.c:242: arch/sparc/crypto/crop_devid.c:11:34: warning: 'crypto_opcode_match' defined but not used [-Wunused-const-variable=] 11 | static const struct of_device_id crypto_opcode_match[] = { | ^~~~~~~~~~~~~~~~~~~ vim +/sha256 +160 arch/sparc/crypto/sha256_glue.c 86c93b24ef49d6 David S. Miller 2012-08-19 159 86c93b24ef49d6 David S. Miller 2012-08-19 @160 static struct shash_alg sha256 = { 86c93b24ef49d6 David S. Miller 2012-08-19 161 .digestsize = SHA256_DIGEST_SIZE, 86c93b24ef49d6 David S. Miller 2012-08-19 162 .init = sha256_sparc64_init, 86c93b24ef49d6 David S. Miller 2012-08-19 163 .update = sha256_sparc64_update, 86c93b24ef49d6 David S. Miller 2012-08-19 164 .final = sha256_sparc64_final, 86c93b24ef49d6 David S. Miller 2012-08-19 165 .export = sha256_sparc64_export, 86c93b24ef49d6 David S. Miller 2012-08-19 166 .import = sha256_sparc64_import, 86c93b24ef49d6 David S. Miller 2012-08-19 167 .descsize = sizeof(struct sha256_state), 86c93b24ef49d6 David S. Miller 2012-08-19 168 .statesize = sizeof(struct sha256_state), 86c93b24ef49d6 David S. Miller 2012-08-19 169 .base = { 86c93b24ef49d6 David S. Miller 2012-08-19 170 .cra_name = "sha256", 86c93b24ef49d6 David S. Miller 2012-08-19 171 .cra_driver_name= "sha256-sparc64", 1080362425793f David S. Miller 2012-09-15 172 .cra_priority = SPARC_CR_OPCODE_PRIORITY, 86c93b24ef49d6 David S. Miller 2012-08-19 173 .cra_blocksize = SHA256_BLOCK_SIZE, 86c93b24ef49d6 David S. Miller 2012-08-19 174 .cra_module = THIS_MODULE, 86c93b24ef49d6 David S. Miller 2012-08-19 175 } 86c93b24ef49d6 David S. Miller 2012-08-19 176 }; 86c93b24ef49d6 David S. Miller 2012-08-19 177 :::::: The code at line 160 was first introduced by commit :::::: 86c93b24ef49d64062045c4e3cc2ed4609f6842a sparc64: Add SHA224/SHA256 driver making use of the 'sha256' instruction. :::::: TO: David S. Miller <davem(a)davemloft.net&gt; :::::: CC: David S. Miller <davem(a)davemloft.net&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org