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    SubjectRe: [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,

    ---
    0-DAY kernel test infrastructure Open Source Technology Center
    https://lists.01.org/pipermail/kbuild-all Intel Corporation
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