[vbabka:b4/slab-cleanup-flags 3/4] fs/proc/inode.c:99:49: sparse: sparse: restricted slab_flags_t degrades to integer

From: kernel test robot <lkp@intel.com>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: oe-kbuild-all@lists.linux.dev
Subject: [vbabka:b4/slab-cleanup-flags 3/4] fs/proc/inode.c:99:49: sparse: sparse: restricted slab_flags_t degrades to integer
Date: Wed, 21 Feb 2024 19:00:09 +0800	[thread overview]
Message-ID: <202402211803.Lmf1ANXx-lkp@intel.com> (raw)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vbabka/linux.git b4/slab-cleanup-flags
head:   95c527f4e5dd5245977e9625ec6e1197dc0e733b
commit: 9cd1bbdf6848577e2e1c1a3cab62dbe91b993439 [3/4] mm, slab: use an enum to define SLAB_ cache creation flags
config: sparc-randconfig-r111-20240221 (https://download.01.org/0day-ci/archive/20240221/202402211803.Lmf1ANXx-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20240221/202402211803.Lmf1ANXx-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/202402211803.Lmf1ANXx-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   fs/proc/inode.c:55:17: sparse: sparse: incompatible types in comparison expression (different address spaces):
   fs/proc/inode.c:55:17: sparse:    struct ctl_table_header [noderef] __rcu *
   fs/proc/inode.c:55:17: sparse:    struct ctl_table_header *
>> fs/proc/inode.c:99:49: sparse: sparse: restricted slab_flags_t degrades to integer
>> fs/proc/inode.c:98:77: sparse: sparse: incorrect type in argument 4 (different base types) @@     expected restricted slab_flags_t [usertype] flags @@     got unsigned int @@
   fs/proc/inode.c:117:22: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct hlist_node *node @@     got struct hlist_node [noderef] __rcu * @@

vim +99 fs/proc/inode.c

^1da177e4c3f41 Linus Torvalds   2005-04-16   92  
195b8cf0689554 Alexey Dobriyan  2018-04-10   93  void __init proc_init_kmemcache(void)
^1da177e4c3f41 Linus Torvalds   2005-04-16   94  {
^1da177e4c3f41 Linus Torvalds   2005-04-16   95  	proc_inode_cachep = kmem_cache_create("proc_inode_cache",
^1da177e4c3f41 Linus Torvalds   2005-04-16   96  					     sizeof(struct proc_inode),
fffb60f93ce588 Paul Jackson     2006-03-24   97  					     0, (SLAB_RECLAIM_ACCOUNT|
5d097056c9a017 Vladimir Davydov 2016-01-14  @98  						SLAB_MEM_SPREAD|SLAB_ACCOUNT|
5d097056c9a017 Vladimir Davydov 2016-01-14  @99  						SLAB_PANIC),
20c2df83d25c6a Paul Mundt       2007-07-20  100  					     init_once);
195b8cf0689554 Alexey Dobriyan  2018-04-10  101  	pde_opener_cache =
195b8cf0689554 Alexey Dobriyan  2018-04-10  102  		kmem_cache_create("pde_opener", sizeof(struct pde_opener), 0,
2acddbe8168967 Alexey Dobriyan  2018-04-10  103  				  SLAB_ACCOUNT|SLAB_PANIC, NULL);
b4884f23331ae3 Alexey Dobriyan  2018-04-10  104  	proc_dir_entry_cache = kmem_cache_create_usercopy(
2d6e4e822ad817 Alexey Dobriyan  2018-08-21  105  		"proc_dir_entry", SIZEOF_PDE, 0, SLAB_PANIC,
2d6e4e822ad817 Alexey Dobriyan  2018-08-21  106  		offsetof(struct proc_dir_entry, inline_name),
2d6e4e822ad817 Alexey Dobriyan  2018-08-21  107  		SIZEOF_PDE_INLINE_NAME, NULL);
2d6e4e822ad817 Alexey Dobriyan  2018-08-21  108  	BUILD_BUG_ON(sizeof(struct proc_dir_entry) >= SIZEOF_PDE);
^1da177e4c3f41 Linus Torvalds   2005-04-16  109  }
^1da177e4c3f41 Linus Torvalds   2005-04-16  110  

:::::: The code at line 99 was first introduced by commit
:::::: 5d097056c9a017a3b720849efb5432f37acabbac kmemcg: account certain kmem allocations to memcg

:::::: TO: Vladimir Davydov <vdavydov@virtuozzo.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

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