[alexshi:mmunstable 42/42] include/linux/mm.h:3025:21: error: call to undeclared function 'pmd_page'; ISO C99 and later do not support implicit function declarations

[alexshi:mmunstable 42/42] include/linux/mm.h:3025:21: error: call to undeclared function 'pmd_page'; ISO C99 and later do not support implicit function declarations

[kernel test robot]

tree:   https://github.com/alexshi/linux.git mmunstable
head:   0dc6582fabc5dcd9239957e6e6501344fd99714a
commit: 0dc6582fabc5dcd9239957e6e6501344fd99714a [42/42] mm/pgtable: prepare for pte_free_defer and its caller callee
config: arm-randconfig-002-20240722 (https://download.01.org/0day-ci/archive/20240722/202407221405.tQX5kQ8V-lkp@intel.com/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project ad154281230d83ee551e12d5be48bb956ef47ed3)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240722/202407221405.tQX5kQ8V-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/202407221405.tQX5kQ8V-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/arm/kernel/asm-offsets.c:12:
   In file included from include/linux/mm.h:2221:
   include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   In file included from arch/arm/kernel/asm-offsets.c:12:
   include/linux/mm.h:3019:25: error: use of undeclared identifier 'PTRS_PER_PMD'
    3019 |         unsigned long mask = ~(PTRS_PER_PMD * sizeof(pmd_t) - 1);
         |                                ^
>> include/linux/mm.h:3025:21: error: call to undeclared function 'pmd_page'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
    3025 |         return page_ptdesc(pmd_page(*pmd));
         |                            ^
   include/linux/mm.h:3025:21: note: did you mean 'put_page'?
   include/linux/mm.h:1541:20: note: 'put_page' declared here
    1541 | static inline void put_page(struct page *page)
         |                    ^
>> include/linux/mm.h:3025:21: error: controlling expression type 'int' not compatible with any generic association type
    3025 |         return page_ptdesc(pmd_page(*pmd));
         |                            ^~~~~~~~~~~~~~
   include/linux/mm_types.h:510:37: note: expanded from macro 'page_ptdesc'
     510 | #define page_ptdesc(p)                  (_Generic((p),                  \
         |                                                    ^
   1 warning and 3 errors generated.
   make[3]: *** [scripts/Makefile.build:117: arch/arm/kernel/asm-offsets.s] Error 1 shuffle=979059129
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1208: prepare0] Error 2 shuffle=979059129
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:240: __sub-make] Error 2 shuffle=979059129
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:240: __sub-make] Error 2 shuffle=979059129
   make: Target 'prepare' not remade because of errors.


vim +/pmd_page +3025 include/linux/mm.h

  3022	
  3023	static inline struct ptdesc *pmd_ptdesc(pmd_t *pmd)
  3024	{
> 3025		return page_ptdesc(pmd_page(*pmd));
  3026	}
  3027	

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