Re: [PATCH] mm: hugetlb: independent PMD page table shared count

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

Hi Liu,

kernel test robot noticed the following build errors:

[auto build test ERROR on akpm-mm/mm-everything]

url:    https://github.com/intel-lab-lkp/linux/commits/Liu-Shixin/mm-hugetlb-independent-PMD-page-table-shared-count/20241214-184912
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20241214104401.1052550-1-liushixin2%40huawei.com
patch subject: [PATCH] mm: hugetlb: independent PMD page table shared count
config: i386-buildonly-randconfig-001-20241215 (https://download.01.org/0day-ci/archive/20241215/202412151252.7ESa61O9-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241215/202412151252.7ESa61O9-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/202412151252.7ESa61O9-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from include/uapi/linux/posix_types.h:5,
                    from include/uapi/linux/types.h:14,
                    from include/linux/types.h:6,
                    from include/linux/kasan-checks.h:5,
                    from include/asm-generic/rwonce.h:26,
                    from ./arch/x86/include/generated/asm/rwonce.h:1,
                    from include/linux/compiler.h:337,
                    from include/linux/build_bug.h:5,
                    from include/linux/container_of.h:5,
                    from include/linux/list.h:5,
                    from include/linux/swait.h:5,
                    from include/linux/completion.h:12,
                    from include/linux/crypto.h:15,
                    from arch/x86/kernel/asm-offsets.c:9:
   include/linux/mm.h: In function 'pagetable_pmd_ctor':
>> include/linux/stddef.h:8:14: error: called object is not a function or function pointer
       8 | #define NULL ((void *)0)
         |              ^
   include/linux/mm_types.h:553:29: note: in expansion of macro 'NULL'
     553 | #define ptdesc_pmd_pts_init NULL
         |                             ^~~~
   include/linux/mm.h:3192:9: note: in expansion of macro 'ptdesc_pmd_pts_init'
    3192 |         ptdesc_pmd_pts_init(ptdesc);
         |         ^~~~~~~~~~~~~~~~~~~
   make[3]: *** [scripts/Makefile.build:102: arch/x86/kernel/asm-offsets.s] Error 1 shuffle=1659946440
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1263: prepare0] Error 2 shuffle=1659946440
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:251: __sub-make] Error 2 shuffle=1659946440
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:251: __sub-make] Error 2 shuffle=1659946440
   make: Target 'prepare' not remade because of errors.


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  

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