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    SubjectRe: [PATCH 10/18] vdso: make arch_setup_additional_pages 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: 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 >>):

    arch/mips/kernel/vdso.c: In function 'arch_setup_additional_pages':
    >> arch/mips/kernel/vdso.c:107:6: error: implicit declaration of function 'down_write_killable' [-Werror=implicit-function-declaration]
    if (down_write_killable(&mm->mmap_sem))
    ^
    cc1: some warnings being treated as errors

    vim +/down_write_killable +107 arch/mips/kernel/vdso.c

    101 struct mm_struct *mm = current->mm;
    102 unsigned long gic_size, vvar_size, size, base, data_addr, vdso_addr;
    103 struct vm_area_struct *vma;
    104 struct resource gic_res;
    105 int ret;
    106
    > 107 if (down_write_killable(&mm->mmap_sem))
    108 return -EINTR;
    109
    110 /*

    ---
    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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