6:34 a.m.
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>
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>
:::::: CC: Saeed Mahameed <saeedm(a)mellanox.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org