linux-kernel - Re: [PATCH v2 07/12] mm: thp: check pmd migration entry in common path

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Date:   Tue, 8 Nov 2016 08:23:50 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Cc:     kbuild-all@...org, linux-mm@...ck.org,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Hugh Dickins <hughd@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Michal Hocko <mhocko@...nel.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Pavel Emelyanov <xemul@...allels.com>,
        Zi Yan <zi.yan@...rutgers.edu>,
        Balbir Singh <bsingharora@...il.com>,
        linux-kernel@...r.kernel.org,
        Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Naoya Horiguchi <nao.horiguchi@...il.com>
Subject: Re: [PATCH v2 07/12] mm: thp: check pmd migration entry in common
 path

Hi Naoya,

[auto build test ERROR on mmotm/master]
[also build test ERROR on v4.9-rc4 next-20161028]
[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/Naoya-Horiguchi/mm-x86-move-_PAGE_SWP_SOFT_DIRTY-from-bit-7-to-bit-6/20161108-080615
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: i386-randconfig-x007-201645 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

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

   mm/memory.c: In function 'copy_pmd_range':
>> mm/memory.c:1002:7: error: implicit declaration of function 'pmd_related' [-Werror=implicit-function-declaration]
      if (pmd_related(*src_pmd)) {
          ^~~~~~~~~~~
   cc1: some warnings being treated as errors
--
   mm/mremap.c: In function 'move_page_tables':
>> mm/mremap.c:197:7: error: implicit declaration of function 'pmd_related' [-Werror=implicit-function-declaration]
      if (pmd_related(*old_pmd)) {
          ^~~~~~~~~~~
   In file included from include/asm-generic/bug.h:4:0,
                    from arch/x86/include/asm/bug.h:35,
                    from include/linux/bug.h:4,
                    from include/linux/mmdebug.h:4,
                    from include/linux/mm.h:8,
                    from mm/mremap.c:10:
>> include/linux/compiler.h:518:38: error: call to '__compiletime_assert_198' declared with attribute error: BUILD_BUG failed
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
                                         ^
   include/linux/compiler.h:501:4: note: in definition of macro '__compiletime_assert'
       prefix ## suffix();    \
       ^~~~~~
   include/linux/compiler.h:518:2: note: in expansion of macro '_compiletime_assert'
     _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
     ^~~~~~~~~~~~~~~~~~~
   include/linux/bug.h:54:37: note: in expansion of macro 'compiletime_assert'
    #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                        ^~~~~~~~~~~~~~~~~~
   include/linux/bug.h:88:21: note: in expansion of macro 'BUILD_BUG_ON_MSG'
    #define BUILD_BUG() BUILD_BUG_ON_MSG(1, "BUILD_BUG failed")
                        ^~~~~~~~~~~~~~~~
>> include/linux/huge_mm.h:183:27: note: in expansion of macro 'BUILD_BUG'
    #define HPAGE_PMD_SIZE ({ BUILD_BUG(); 0; })
                              ^~~~~~~~~
>> mm/mremap.c:198:18: note: in expansion of macro 'HPAGE_PMD_SIZE'
       if (extent == HPAGE_PMD_SIZE) {
                     ^~~~~~~~~~~~~~
   cc1: some warnings being treated as errors
--
   mm/madvise.c: In function 'madvise_free_pte_range':
>> mm/madvise.c:277:6: error: implicit declaration of function 'pmd_related' [-Werror=implicit-function-declaration]
     if (pmd_related(*pmd))
         ^~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/pmd_related +1002 mm/memory.c

   996		dst_pmd = pmd_alloc(dst_mm, dst_pud, addr);
   997		if (!dst_pmd)
   998			return -ENOMEM;
   999		src_pmd = pmd_offset(src_pud, addr);
  1000		do {
  1001			next = pmd_addr_end(addr, end);
> 1002			if (pmd_related(*src_pmd)) {
  1003				int err;
  1004				VM_BUG_ON(next-addr != HPAGE_PMD_SIZE);
  1005				err = copy_huge_pmd(dst_mm, src_mm,

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