Hi David, kernel test robot noticed the following build warnings: [auto build test WARNING on 9a48d604672220545d209e9996c2a1edbb5637f6] url: https://github.com/intel-lab-lkp/linux/commits/David-Yang/crypto-hisilicon-Add-HiSilicon-ADVCA-Subsystem/20230513-154545 base: 9a48d604672220545d209e9996c2a1edbb5637f6 patch link: https://lore.kernel.org/r/20230513074339.266879-2-mmyangfl%40gmail.com patch subject: [PATCH v2 1/2] crypto: hisilicon - Add HiSilicon ADVCA Subsystem config: sh-allmodconfig (https://download.01.org/0day-ci/archive/20230513/202305131630.Wt74Rpda-lkp@xxxxxxxxx/config) compiler: sh4-linux-gcc (GCC) 12.1.0 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://github.com/intel-lab-lkp/linux/commit/6f6cb7dd5da91063c560d2d252104268ffac785b git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review David-Yang/crypto-hisilicon-Add-HiSilicon-ADVCA-Subsystem/20230513-154545 git checkout 6f6cb7dd5da91063c560d2d252104268ffac785b # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=sh olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=sh SHELL=/bin/bash drivers/crypto/hisilicon/advca/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202305131630.Wt74Rpda-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/crypto/hisilicon/advca/hisi-advca-muc.c:77:41: warning: unsigned conversion from 'int' to 'unsigned char:2' changes value from '4' to '0' [-Woverflow] 77 | #define MUC_MODE_CTR 4 /* not for DES */ | ^ drivers/crypto/hisilicon/advca/hisi-advca-muc.c:1283:25: note: in expansion of macro 'MUC_MODE_CTR' 1283 | .mode = MUC_MODE_##_MODE, \ | ^~~~~~~~~ drivers/crypto/hisilicon/advca/hisi-advca-muc.c:1298:9: note: in expansion of macro 'hica_muc_tmpl_define' 1298 | hica_muc_tmpl_define(AES, _MODE, aes, _mode, AES_MIN_KEY_SIZE, \ | ^~~~~~~~~~~~~~~~~~~~ drivers/crypto/hisilicon/advca/hisi-advca-muc.c:1311:9: note: in expansion of macro 'hica_muc_tmpl_define_aes' 1311 | hica_muc_tmpl_define_aes(CTR, ctr), | ^~~~~~~~~~~~~~~~~~~~~~~~ vim +77 drivers/crypto/hisilicon/advca/hisi-advca-muc.c 69 70 /* for CTRL reg */ 71 #define MUC_DECRYPT BIT(0) 72 #define MUC_MODE GENMASK(3, 1) /* other: as 0 */ 73 #define MUC_MODE_ECB 0 74 #define MUC_MODE_CBC 1 75 #define MUC_MODE_CFB 2 76 #define MUC_MODE_OFB 3 > 77 #define MUC_MODE_CTR 4 /* not for DES */ 78 #define MUC_ALG GENMASK(5, 4) /* other: as 0 */ 79 #define MUC_ALG_DES 0 80 #define MUC_ALG_DES3_EDE 1 81 #define MUC_ALG_AES 2 82 #define MUC_WIDTH GENMASK(7, 6) /* other: as 0 */ 83 #define MUC_WIDTH_BLOCK 0 84 #define MUC_WIDTH_8B 1 85 #define MUC_WIDTH_1B 2 86 #define MUC_CHAN0_IV_CHANGE BIT(8) 87 #define MUC_KEY GENMASK(10, 9) /* other: as 0 */ 88 #define MUC_KEY_AES_128B 0 89 #define MUC_KEY_AES_192B 1 90 #define MUC_KEY_AES_256B 2 91 #define MUC_KEY_DES 0 92 #define MUC_KEY_DES3_EDE_3KEY 0 93 #define MUC_KEY_DES3_EDE_2KEY 3 94 #define MUC_KEY_FROM_MKL BIT(13) 95 #define MUC_KEY_ID GENMASK(16, 14) 96 #define MUC_WEIGHT GENMASK(31, 22) 97 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests