[akpm-mm:mm-unstable 272/272] include/linux/stddef.h:8:14: error: called object is not a function or function pointer

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
head:   ea17e4fdc13cae144d90ce8561c2f50a49492037
commit: ea17e4fdc13cae144d90ce8561c2f50a49492037 [272/272] jfs: implement migrate_folio for jfs_metapage_aops
config: arm-randconfig-002-20250502 (https://download.01.org/0day-ci/archive/20250502/202505020405.YzD9aNCo-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 7.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250502/202505020405.YzD9aNCo-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/202505020405.YzD9aNCo-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/uapi/linux/posix_types.h:5:0,
                    from include/uapi/linux/types.h:14,
                    from include/linux/types.h:6,
                    from include/linux/blkdev.h:8,
                    from fs/jfs/jfs_metapage.c:7:
   fs/jfs/jfs_metapage.c: In function '__metapage_migrate_folio':
>> include/linux/stddef.h:8:14: error: called object is not a function or function pointer
    #define NULL ((void *)0)
                 ^
   include/linux/pagemap.h:1234:31: note: in expansion of macro 'NULL'
    #define filemap_migrate_folio NULL
                                  ^~~~
   fs/jfs/jfs_metapage.c:238:7: note: in expansion of macro 'filemap_migrate_folio'
     rc = filemap_migrate_folio(mapping, dst, src, mode);
          ^~~~~~~~~~~~~~~~~~~~~
   fs/jfs/jfs_metapage.c: In function 'metapage_migrate_folio':
>> include/linux/stddef.h:8:14: error: called object is not a function or function pointer
    #define NULL ((void *)0)
                 ^
   include/linux/pagemap.h:1234:31: note: in expansion of macro 'NULL'
    #define filemap_migrate_folio NULL
                                  ^~~~
   fs/jfs/jfs_metapage.c:641:10: note: in expansion of macro 'filemap_migrate_folio'
      return filemap_migrate_folio(mapping, dst, src, mode);
             ^~~~~~~~~~~~~~~~~~~~~


vim +8 include/linux/stddef.h

^1da177e4c3f415 Linus Torvalds   2005-04-16  6  
^1da177e4c3f415 Linus Torvalds   2005-04-16  7  #undef NULL
^1da177e4c3f415 Linus Torvalds   2005-04-16 @8  #define NULL ((void *)0)
6e2182874324727 Richard Knutsson 2006-09-30  9  

:::::: The code at line 8 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@ppc970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@ppc970.osdl.org>

-- 
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https://github.com/intel/lkp-tests/wiki