linux-kernel - Re: [PATCH 07/12] mm: convert try_to_unmap_one() to page_check

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Date:   Wed, 25 Jan 2017 11:13:09 +0800
From:   kbuild test robot <lkp@...el.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     kbuild-all@...org, Andrea Arcangeli <aarcange@...hat.com>,
        Hugh Dickins <hughd@...gle.com>,
        Rik van Riel <riel@...hat.com>,
        Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
        linux-kernel@...r.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: Re: [PATCH 07/12] mm: convert try_to_unmap_one() to page_check_walk()

Hi Kirill,

[auto build test ERROR on mmotm/master]
[also build test ERROR on v4.10-rc5 next-20170124]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Kirill-A-Shutemov/Fix-few-rmap-related-THP-bugs/20170125-081918
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: sh-titan_defconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
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=sh 

All errors (new ones prefixed by >>):

   mm/rmap.c: In function 'page_mkclean_one':
   mm/rmap.c:1046:9: error: implicit declaration of function 'pmd_dirty' [-Werror=implicit-function-declaration]
       if (!pmd_dirty(*pmd) && !pmd_write(*pmd))
            ^~~~~~~~~
   mm/rmap.c:1051:12: error: implicit declaration of function 'pmd_wrprotect' [-Werror=implicit-function-declaration]
       entry = pmd_wrprotect(entry);
               ^~~~~~~~~~~~~
   mm/rmap.c:1051:10: error: incompatible types when assigning to type 'pmd_t {aka struct <anonymous>}' from type 'int'
       entry = pmd_wrprotect(entry);
             ^
   mm/rmap.c:1052:12: error: implicit declaration of function 'pmd_mkclean' [-Werror=implicit-function-declaration]
       entry = pmd_mkclean(entry);
               ^~~~~~~~~~~
   mm/rmap.c:1052:10: error: incompatible types when assigning to type 'pmd_t {aka struct <anonymous>}' from type 'int'
       entry = pmd_mkclean(entry);
             ^
   mm/rmap.c:1053:4: error: implicit declaration of function 'set_pmd_at' [-Werror=implicit-function-declaration]
       set_pmd_at(vma->vm_mm, address, pmd, entry);
       ^~~~~~~~~~
   mm/rmap.c: In function 'try_to_unmap_one':
>> mm/rmap.c:1518:34: error: implicit declaration of function 'pte_to_pfn' [-Werror=implicit-function-declaration]
      flush_cache_page(vma, address, pte_to_pfn(pcw.pte));
                                     ^~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/pte_to_pfn +1518 mm/rmap.c

  1512					page_check_walk_done(&pcw);
  1513					break;
  1514				}
  1515			}
  1516	
  1517			/* Nuke the page table entry. */
> 1518			flush_cache_page(vma, address, pte_to_pfn(pcw.pte));
  1519			if (should_defer_flush(mm, flags)) {
  1520				/*
  1521				 * We clear the PTE but do not flush so potentially

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