[gourryinverse:scratch/gourry/cxl/compression/file_cleancache 85/98] mm/cram.c:165:14: sparse: sparse: incompatible types in comparison expression (different address spaces):

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

tree:   https://github.com/gourryinverse/linux scratch/gourry/cxl/compression/file_cleancache
head:   917ae95f0c6e29eaa695ff88d91f1ee1d8bc626d
commit: 9fb117618cd8a8687bae14185d28b33360452bd9 [85/98] mm/cram: core compressed-RAM tier API
config: x86_64-randconfig-r112-20260712 (https://download.01.org/0day-ci/archive/20260712/202607120911.twqPgjfB-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260712/202607120911.twqPgjfB-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/202607120911.twqPgjfB-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> mm/cram.c:165:14: sparse: sparse: incompatible types in comparison expression (different address spaces):
   mm/cram.c:165:14: sparse:    struct cram_node [noderef] __rcu *
   mm/cram.c:165:14: sparse:    struct cram_node *
   mm/cram.c:217:41: sparse: sparse: incompatible types in comparison expression (different address spaces):
   mm/cram.c:217:41: sparse:    struct cram_node [noderef] __rcu *
   mm/cram.c:217:41: sparse:    struct cram_node *
   mm/cram.c:803:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   mm/cram.c:803:9: sparse:    struct cram_node [noderef] __rcu *
   mm/cram.c:803:9: sparse:    struct cram_node *
   mm/cram.c:893:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   mm/cram.c:893:9: sparse:    struct cram_node [noderef] __rcu *
   mm/cram.c:893:9: sparse:    struct cram_node *
   mm/cram.c:146:14: sparse: sparse: incompatible types in comparison expression (different address spaces):
   mm/cram.c:146:14: sparse:    struct cram_node [noderef] __rcu *
   mm/cram.c:146:14: sparse:    struct cram_node *
   mm/cram.c:146:14: sparse: sparse: incompatible types in comparison expression (different address spaces):
   mm/cram.c:146:14: sparse:    struct cram_node [noderef] __rcu *
   mm/cram.c:146:14: sparse:    struct cram_node *
   mm/cram.c:146:14: sparse: sparse: incompatible types in comparison expression (different address spaces):
   mm/cram.c:146:14: sparse:    struct cram_node [noderef] __rcu *
   mm/cram.c:146:14: sparse:    struct cram_node *
   mm/cram.c:146:14: sparse: sparse: incompatible types in comparison expression (different address spaces):
   mm/cram.c:146:14: sparse:    struct cram_node [noderef] __rcu *
   mm/cram.c:146:14: sparse:    struct cram_node *
   mm/cram.c:146:14: sparse: sparse: incompatible types in comparison expression (different address spaces):
   mm/cram.c:146:14: sparse:    struct cram_node [noderef] __rcu *
   mm/cram.c:146:14: sparse:    struct cram_node *
   mm/cram.c:146:14: sparse: sparse: incompatible types in comparison expression (different address spaces):
   mm/cram.c:146:14: sparse:    struct cram_node [noderef] __rcu *
   mm/cram.c:146:14: sparse:    struct cram_node *

vim +165 mm/cram.c

   159	
   160	static void cram_set_migration_blocked(int nid, bool blocked)
   161	{
   162		struct cram_node *cn;
   163	
   164		rcu_read_lock();
 > 165		cn = rcu_dereference(cram_nodes[nid]);
   166		if (cn)
   167			WRITE_ONCE(cn->migration_blocked, blocked);
   168		rcu_read_unlock();
   169	}
   170	

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