Re: [PATCH v2] sparc64: Define p4d_page() instead of stubbing it to NULL

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

Hi Rosen,

kernel test robot noticed the following build errors:

[auto build test ERROR on v7.3-rc6]
[also build test ERROR on linus/master next-20261008]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Rosen-Penev/sparc64-Define-p4d_page-instead-of-stubbing-it-to-NULL/20261008-121711
base:   v7.3-rc6
patch link:    https://lore.kernel.org/r/20261008191711.223236-1-rosenp%40gmail.com
patch subject: [PATCH v2] sparc64: Define p4d_page() instead of stubbing it to NULL
config: sparc-randconfig-1000-20261010 (https://download.01.org/0day-ci/archive/20261010/202610100432.gMvyFk85-lkp@intel.com/config)
compiler: sparc64-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261010/202610100432.gMvyFk85-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/202610100432.gMvyFk85-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/sparc/include/asm/pgtable.h:5,
                    from include/linux/pgtable.h:6,
                    from include/linux/mm.h:31,
                    from mm/vmalloc.c:12:
   mm/vmalloc.c: In function 'vmalloc_to_page':
>> arch/sparc/include/asm/pgtable_64.h:864:25: error: expected expression before 'static'
    #define p4d_page(p4d)   static inline struct page *p4d_page(p4d_t p4d) { return NULL; }
                            ^~~~~~
   mm/vmalloc.c:849:10: note: in expansion of macro 'p4d_page'
      return p4d_page(*p4d) + ((addr & ~P4D_MASK) >> PAGE_SHIFT);
             ^~~~~~~~


vim +/static +864 arch/sparc/include/asm/pgtable_64.h

   862	
   863	/* only used by the stubbed out hugetlb gup code, should never be called */
 > 864	#define p4d_page(p4d)			static inline struct page *p4d_page(p4d_t p4d) { return NULL; }
   865	

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