arch/x86/include/asm/pgtable.h:888:2: error: implicit declaration of function 'native_pud_clear'

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   2d62e0768d3c28536d4cfe4c40ba1e5e8e442a93
commit: a00cc7d9dd93d66a3fb83fc52aa57a4bec51c517 mm, x86: add support for PUD-sized transparent hugepages
date:   8 days ago
config: i386-randconfig-x010-201710 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        git checkout a00cc7d9dd93d66a3fb83fc52aa57a4bec51c517
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   In file included from include/linux/mm.h:68:0,
                    from include/linux/highmem.h:7,
                    from include/linux/bio.h:21,
                    from include/linux/writeback.h:205,
                    from include/linux/memcontrol.h:30,
                    from include/linux/swap.h:8,
                    from include/linux/suspend.h:4,
                    from arch/x86/kernel/asm-offsets.c:12:
   arch/x86/include/asm/pgtable.h: In function 'native_local_pudp_get_and_clear':
>> arch/x86/include/asm/pgtable.h:888:2: error: implicit declaration of function 'native_pud_clear' [-Werror=implicit-function-declaration]
     native_pud_clear(pudp);
     ^~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors
   make[2]: *** [arch/x86/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [sub-make] Error 2

vim +/native_pud_clear +888 arch/x86/include/asm/pgtable.h

   882	}
   883	
   884	static inline pud_t native_local_pudp_get_and_clear(pud_t *pudp)
   885	{
   886		pud_t res = *pudp;
   887	
 > 888		native_pud_clear(pudp);
   889		return res;
   890	}
   891	

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