Re: [PATCH 2/3] mm, slab: use an enum to define SLAB_ cache creation flags

[kernel test robot <lkp@intel.com>]

Hi Vlastimil,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 6613476e225e090cc9aad49be7fa504e290dd33d]

url:    https://github.com/intel-lab-lkp/linux/commits/Vlastimil-Babka/mm-slab-deprecate-SLAB_MEM_SPREAD-flag/20240221-005936
base:   6613476e225e090cc9aad49be7fa504e290dd33d
patch link:    https://lore.kernel.org/r/20240220-slab-cleanup-flags-v1-2-e657e373944a%40suse.cz
patch subject: [PATCH 2/3] mm, slab: use an enum to define SLAB_ cache creation flags
config: i386-randconfig-r111-20240222 (https://download.01.org/0day-ci/archive/20240222/202402220942.XxR0oby3-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240222/202402220942.XxR0oby3-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202402220942.XxR0oby3-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> fs/overlayfs/super.c:1499:63: sparse: sparse: restricted slab_flags_t degrades to integer
>> fs/overlayfs/super.c:1499:62: sparse: sparse: incorrect type in argument 4 (different base types) @@     expected restricted slab_flags_t [usertype] flags @@     got unsigned int @@
   fs/overlayfs/super.c:1499:62: sparse:     expected restricted slab_flags_t [usertype] flags
   fs/overlayfs/super.c:1499:62: sparse:     got unsigned int
--
>> fs/tracefs/inode.c:793:54: sparse: sparse: restricted slab_flags_t degrades to integer
>> fs/tracefs/inode.c:792:69: sparse: sparse: incorrect type in argument 4 (different base types) @@     expected restricted slab_flags_t [usertype] flags @@     got unsigned int @@
   fs/tracefs/inode.c:792:69: sparse:     expected restricted slab_flags_t [usertype] flags
   fs/tracefs/inode.c:792:69: sparse:     got unsigned int

vim +1499 fs/overlayfs/super.c

13cf199d0088b7 Amir Goldstein 2017-06-12  1491  
e9be9d5e76e348 Miklos Szeredi 2014-10-24  1492  static int __init ovl_init(void)
e9be9d5e76e348 Miklos Szeredi 2014-10-24  1493  {
13cf199d0088b7 Amir Goldstein 2017-06-12  1494  	int err;
13cf199d0088b7 Amir Goldstein 2017-06-12  1495  
13cf199d0088b7 Amir Goldstein 2017-06-12  1496  	ovl_inode_cachep = kmem_cache_create("ovl_inode",
13cf199d0088b7 Amir Goldstein 2017-06-12  1497  					     sizeof(struct ovl_inode), 0,
13cf199d0088b7 Amir Goldstein 2017-06-12  1498  					     (SLAB_RECLAIM_ACCOUNT|
13cf199d0088b7 Amir Goldstein 2017-06-12 @1499  					      SLAB_MEM_SPREAD|SLAB_ACCOUNT),
13cf199d0088b7 Amir Goldstein 2017-06-12  1500  					     ovl_inode_init_once);
13cf199d0088b7 Amir Goldstein 2017-06-12  1501  	if (ovl_inode_cachep == NULL)
13cf199d0088b7 Amir Goldstein 2017-06-12  1502  		return -ENOMEM;
13cf199d0088b7 Amir Goldstein 2017-06-12  1503  
13cf199d0088b7 Amir Goldstein 2017-06-12  1504  	err = register_filesystem(&ovl_fs_type);
2406a307ac7ddf Jiufei Xue     2019-11-20  1505  	if (!err)
2406a307ac7ddf Jiufei Xue     2019-11-20  1506  		return 0;
2406a307ac7ddf Jiufei Xue     2019-11-20  1507  
13cf199d0088b7 Amir Goldstein 2017-06-12  1508  	kmem_cache_destroy(ovl_inode_cachep);
13cf199d0088b7 Amir Goldstein 2017-06-12  1509  
13cf199d0088b7 Amir Goldstein 2017-06-12  1510  	return err;
e9be9d5e76e348 Miklos Szeredi 2014-10-24  1511  }
e9be9d5e76e348 Miklos Szeredi 2014-10-24  1512  

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