Hi,

[auto build test ERROR on v4.6-rc4]
[also build test ERROR on next-20160420]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Yang-Shi/mm-move-huge_pmd_set_accessed-out-of-huge_memory-c/20160421-025318
config: mips-allyesconfig (attached as .config)
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=mips 

All errors (new ones prefixed by >>):

   mm/memory.c: In function 'huge_pmd_set_accessed':
>> mm/memory.c:3304:10: error: implicit declaration of function 'pmd_mkyoung' [-Werror=implicit-function-declaration]
     entry = pmd_mkyoung(orig_pmd);
             ^
>> mm/memory.c:3304:8: error: incompatible types when assigning to type 'pmd_t {aka struct <anonymous>}' from type 'int'
     entry = pmd_mkyoung(orig_pmd);
           ^
   cc1: some warnings being treated as errors

vim +/pmd_mkyoung +3304 mm/memory.c

  3298		unsigned long haddr;
  3299	
  3300		ptl = pmd_lock(mm, pmd);
  3301		if (unlikely(!pmd_same(*pmd, orig_pmd)))
  3302			goto unlock;
  3303	
> 3304		entry = pmd_mkyoung(orig_pmd);
  3305		haddr = address & HPAGE_PMD_MASK;
  3306		if (pmdp_set_access_flags(vma, haddr, pmd, entry, dirty))
  3307			update_mmu_cache_pmd(vma, address, pmd);

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