Hi Marco, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 3644e2d2dda78e21edd8f5415b6d7ab03f5f54f3 commit: 5106dfeaeabea73d5132daab1d89d57b57fa98b7 crypto: qat - add AES-XTS support for QAT GEN4 devices date: 8 days ago config: i386-randconfig-m021-20201216 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # 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 5106dfeaeabea73d5132daab1d89d57b57fa98b7 # save the attached .config to linux build tree make W=1 ARCH=i386 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 >>): ld: drivers/crypto/qat/qat_common/qat_algs.o: in function `qat_alg_xts_reverse_key': vim +483 drivers/crypto/qat/qat_common/qat_algs.c 475 476 static void qat_alg_xts_reverse_key(const u8 *key_forward, unsigned int keylen, 477 u8 *key_reverse) 478 { 479 struct crypto_aes_ctx aes_expanded; 480 int nrounds; 481 u8 *key; 482 484 if (keylen == AES_KEYSIZE_128) { 485 nrounds = 10; 486 key = (u8 *)aes_expanded.key_enc + (AES_BLOCK_SIZE * nrounds); 487 memcpy(key_reverse, key, AES_BLOCK_SIZE); 488 } else { 489 /* AES_KEYSIZE_256 */ 490 nrounds = 14; 491 key = (u8 *)aes_expanded.key_enc + (AES_BLOCK_SIZE * nrounds); 492 memcpy(key_reverse, key, AES_BLOCK_SIZE); 493 memcpy(key_reverse + AES_BLOCK_SIZE, key - AES_BLOCK_SIZE, 494 AES_BLOCK_SIZE); 495 } 496 } 497 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org