[mmotm:master 86/178] include/asm-generic/tlb.h:133:3: error: implicit declaration of function '__tlb_adjust_range'

[kbuild test robot <fengguang.wu@intel.com>]

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tree:   git://git.cmpxchg.org/linux-mmotm.git master
head:   2e0066ec9585a5074c8040d639c3c669eb4e905f
commit: d219cbe49c1d86c9ff2be25d9238047e878295b1 [86/178] mm: change the interface for __tlb_remove_page()
config: i386-tinyconfig (attached as .config)
compiler: gcc-6 (Debian 6.1.1-1) 6.1.1 20160430
reproduce:
        git checkout d219cbe49c1d86c9ff2be25d9238047e878295b1
        # save the attached .config to linux build tree
        make ARCH=i386 

Note: the mmotm/master HEAD 2e0066ec9585a5074c8040d639c3c669eb4e905f builds fine.
      It only hurts bisectibility.

All error/warnings (new ones prefixed by >>):

   In file included from arch/x86/include/asm/tlb.h:16:0,
                    from arch/x86/include/asm/efi.h:7,
                    from arch/x86/kernel/setup.c:81:
   include/asm-generic/tlb.h: In function 'tlb_remove_page':
>> include/asm-generic/tlb.h:133:3: error: implicit declaration of function '__tlb_adjust_range' [-Werror=implicit-function-declaration]
      __tlb_adjust_range(tlb, tlb->addr);
      ^~~~~~~~~~~~~~~~~~
   include/asm-generic/tlb.h: At top level:
>> include/asm-generic/tlb.h:138:20: warning: conflicting types for '__tlb_adjust_range'
    static inline void __tlb_adjust_range(struct mmu_gather *tlb,
                       ^~~~~~~~~~~~~~~~~~
>> include/asm-generic/tlb.h:138:20: error: static declaration of '__tlb_adjust_range' follows non-static declaration
   include/asm-generic/tlb.h:133:3: note: previous implicit declaration of '__tlb_adjust_range' was here
      __tlb_adjust_range(tlb, tlb->addr);
      ^~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/__tlb_adjust_range +133 include/asm-generic/tlb.h

   127	 *	required.
   128	 */
   129	static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
   130	{
   131		if (__tlb_remove_page(tlb, page)) {
   132			tlb_flush_mmu(tlb);
 > 133			__tlb_adjust_range(tlb, tlb->addr);
   134			__tlb_remove_page(tlb, page);
   135		}
   136	}
   137	
 > 138	static inline void __tlb_adjust_range(struct mmu_gather *tlb,
   139					      unsigned long address)
   140	{
   141		tlb->start = min(tlb->start, address);

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