tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: d98f554b318f57ded14684c04b3337a1975cf490 commit: 960984d964a9341cf50bf2b4ffdf0beb14467517 [2159/4141] include/linux/compiler-gcc.h: sparse can do constant folding of __builtin_bswap*() config: i386-randconfig-m021-20210312 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; New smatch warnings: drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c:34 mlx5_dm_create() warn: should '(((1))) << (((__builtin_bswap32(((*((dev->caps.hca_cur[15]) + (($expr_0x7fbd58df5790(30)) / 32))))) >> (32 - 8 - (($expr_0x7fbd58df5d30(30)) & 31))) & (((1 << 8) - 1))) - (((__builtin_bswap32(((*((dev->caps.hca_cur[15]) + (($expr_0x7fbd58df6af0(30)) / 32))))) >> (32 - 6 - (($expr_0x7fbd58df7090(30)) & 31))) & (((1 << 6) - 1)))))' be a 64 bit type? Old smatch warnings: drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c:46 mlx5_dm_create() warn: should '(((1))) << (((__builtin_bswap32(((*((dev->caps.hca_cur[15]) + (($expr_0x7fbd58df9610(30)) / 32))))) >> (32 - 8 - (($expr_0x7fbd58df9bb0(30)) & 31))) & (((1 << 8) - 1))) - (((__builtin_bswap32(((*((dev->caps.hca_cur[15]) + (($expr_0x7fbd58dfa970(30)) / 32))))) >> (32 - 6 - (($expr_0x7fbd58dfaf10(30)) & 31))) & (((1 << 6) - 1)))))' be a 64 bit type? vim +34 drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c c9b9dcb430b3cd Ariel Levkovich 2019-08-29 16 c9b9dcb430b3cd Ariel Levkovich 2019-08-29 17 struct mlx5_dm *mlx5_dm_create(struct mlx5_core_dev *dev) c9b9dcb430b3cd Ariel Levkovich 2019-08-29 18 { c9b9dcb430b3cd Ariel Levkovich 2019-08-29 19 u64 header_modify_icm_blocks = 0; c9b9dcb430b3cd Ariel Levkovich 2019-08-29 20 u64 steering_icm_blocks = 0; c9b9dcb430b3cd Ariel Levkovich 2019-08-29 21 struct mlx5_dm *dm; c9b9dcb430b3cd Ariel Levkovich 2019-08-29 22 c9b9dcb430b3cd Ariel Levkovich 2019-08-29 23 if (!(MLX5_CAP_GEN_64(dev, general_obj_types) & MLX5_GENERAL_OBJ_TYPES_CAP_SW_ICM)) 586ee9e8a3b007 Saeed Mahameed 2020-01-22 24 return NULL; c9b9dcb430b3cd Ariel Levkovich 2019-08-29 25 c9b9dcb430b3cd Ariel Levkovich 2019-08-29 26 dm = kzalloc(sizeof(*dm), GFP_KERNEL); c9b9dcb430b3cd Ariel Levkovich 2019-08-29 27 if (!dm) c9b9dcb430b3cd Ariel Levkovich 2019-08-29 28 return ERR_PTR(-ENOMEM); c9b9dcb430b3cd Ariel Levkovich 2019-08-29 29 c9b9dcb430b3cd Ariel Levkovich 2019-08-29 30 spin_lock_init(&dm->lock); c9b9dcb430b3cd Ariel Levkovich 2019-08-29 31 c9b9dcb430b3cd Ariel Levkovich 2019-08-29 32 if (MLX5_CAP64_DEV_MEM(dev, steering_sw_icm_start_address)) { c9b9dcb430b3cd Ariel Levkovich 2019-08-29 33 steering_icm_blocks = c9b9dcb430b3cd Ariel Levkovich 2019-08-29 @34 BIT(MLX5_CAP_DEV_MEM(dev, log_steering_sw_icm_size) - c9b9dcb430b3cd Ariel Levkovich 2019-08-29 35 MLX5_LOG_SW_ICM_BLOCK_SIZE(dev)); c9b9dcb430b3cd Ariel Levkovich 2019-08-29 36 c9b9dcb430b3cd Ariel Levkovich 2019-08-29 37 dm->steering_sw_icm_alloc_blocks = c9b9dcb430b3cd Ariel Levkovich 2019-08-29 38 kcalloc(BITS_TO_LONGS(steering_icm_blocks), c9b9dcb430b3cd Ariel Levkovich 2019-08-29 39 sizeof(unsigned long), GFP_KERNEL); c9b9dcb430b3cd Ariel Levkovich 2019-08-29 40 if (!dm->steering_sw_icm_alloc_blocks) c9b9dcb430b3cd Ariel Levkovich 2019-08-29 41 goto err_steering; c9b9dcb430b3cd Ariel Levkovich 2019-08-29 42 } c9b9dcb430b3cd Ariel Levkovich 2019-08-29 43 c9b9dcb430b3cd Ariel Levkovich 2019-08-29 44 if (MLX5_CAP64_DEV_MEM(dev, header_modify_sw_icm_start_address)) { c9b9dcb430b3cd Ariel Levkovich 2019-08-29 45 header_modify_icm_blocks = c9b9dcb430b3cd Ariel Levkovich 2019-08-29 46 BIT(MLX5_CAP_DEV_MEM(dev, log_header_modify_sw_icm_size) - c9b9dcb430b3cd Ariel Levkovich 2019-08-29 47 MLX5_LOG_SW_ICM_BLOCK_SIZE(dev)); c9b9dcb430b3cd Ariel Levkovich 2019-08-29 48 c9b9dcb430b3cd Ariel Levkovich 2019-08-29 49 dm->header_modify_sw_icm_alloc_blocks = c9b9dcb430b3cd Ariel Levkovich 2019-08-29 50 kcalloc(BITS_TO_LONGS(header_modify_icm_blocks), c9b9dcb430b3cd Ariel Levkovich 2019-08-29 51 sizeof(unsigned long), GFP_KERNEL); c9b9dcb430b3cd Ariel Levkovich 2019-08-29 52 if (!dm->header_modify_sw_icm_alloc_blocks) c9b9dcb430b3cd Ariel Levkovich 2019-08-29 53 goto err_modify_hdr; c9b9dcb430b3cd Ariel Levkovich 2019-08-29 54 } c9b9dcb430b3cd Ariel Levkovich 2019-08-29 55 c9b9dcb430b3cd Ariel Levkovich 2019-08-29 56 return dm; c9b9dcb430b3cd Ariel Levkovich 2019-08-29 57 c9b9dcb430b3cd Ariel Levkovich 2019-08-29 58 err_modify_hdr: c9b9dcb430b3cd Ariel Levkovich 2019-08-29 59 kfree(dm->steering_sw_icm_alloc_blocks); c9b9dcb430b3cd Ariel Levkovich 2019-08-29 60 c9b9dcb430b3cd Ariel Levkovich 2019-08-29 61 err_steering: c9b9dcb430b3cd Ariel Levkovich 2019-08-29 62 kfree(dm); c9b9dcb430b3cd Ariel Levkovich 2019-08-29 63 c9b9dcb430b3cd Ariel Levkovich 2019-08-29 64 return ERR_PTR(-ENOMEM); c9b9dcb430b3cd Ariel Levkovich 2019-08-29 65 } c9b9dcb430b3cd Ariel Levkovich 2019-08-29 66 :::::: The code at line 34 was first introduced by commit :::::: c9b9dcb430b3cd0ad2b04c360c4e528d73430481 net/mlx5: Move device memory management to mlx5_core :::::: TO: Ariel Levkovich <lariel(a)mellanox.com&gt; :::::: CC: Saeed Mahameed <saeedm(a)mellanox.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org