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    SubjectRe: [PATCH 08/18] mm, fork: make dup_mmap wait for mmap_sem for write killable
    Hi Michal,

    [auto build test ERROR on next-20160229]
    [also build test ERROR on v4.5-rc6]
    [cannot apply to drm/drm-next drm-intel/for-linux-next v4.5-rc6 v4.5-rc5 v4.5-rc4]
    [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/Michal-Hocko/change-mmap_sem-taken-for-write-killable/20160229-213258
    config: i386-randconfig-x004-201609 (attached as .config)
    reproduce:
    # save the attached .config to linux build tree
    make ARCH=i386

    All errors (new ones prefixed by >>):

    kernel/fork.c: In function 'dup_mmap':
    >> kernel/fork.c:416:6: error: implicit declaration of function 'down_write_killable' [-Werror=implicit-function-declaration]
    if (down_write_killable(&oldmm->mmap_sem)) {
    ^
    cc1: some warnings being treated as errors

    vim +/down_write_killable +416 kernel/fork.c

    410 struct vm_area_struct *mpnt, *tmp, *prev, **pprev;
    411 struct rb_node **rb_link, *rb_parent;
    412 int retval;
    413 unsigned long charge;
    414
    415 uprobe_start_dup_mmap();
    > 416 if (down_write_killable(&oldmm->mmap_sem)) {
    417 uprobe_end_dup_mmap();
    418 return -EINTR;
    419 }

    ---
    0-DAY kernel test infrastructure Open Source Technology Center
    https://lists.01.org/pipermail/kbuild-all Intel Corporation
    [unhandled content-type:application/octet-stream]
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