linux-kernel - Re: [PATCH 4/4] oom-reaper: use madvise_dontneed() logic to decide if unmap the VMA

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Message-ID: <201612200935.Tko2Vi1b%fengguang.wu@intel.com>
Date:   Tue, 20 Dec 2016 09:44:09 +0800
From:   kbuild test robot <lkp@...el.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     kbuild-all@...org, Michal Hocko <mhocko@...e.com>,
        Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        Peter Zijlstra <peterz@...radead.org>,
        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 4/4] oom-reaper: use madvise_dontneed() logic to decide
 if unmap the VMA

Hi Kirill,

[auto build test ERROR on mmotm/master]
[also build test ERROR on v4.9 next-20161219]
[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/mm-drop-zap_details-ignore_dirty/20161220-092938
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: i386-randconfig-x003-201651 (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 errors (new ones prefixed by >>):

   mm/madvise.c: In function 'madvise_dontneed':
>> mm/madvise.c:476:7: error: implicit declaration of function 'can_madv_dontneed_vma' [-Werror=implicit-function-declaration]
     if (!can_madv_dontneed_vma(vma))
          ^~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/can_madv_dontneed_vma +476 mm/madvise.c

   470	 */
   471	static long madvise_dontneed(struct vm_area_struct *vma,
   472				     struct vm_area_struct **prev,
   473				     unsigned long start, unsigned long end)
   474	{
   475		*prev = vma;
 > 476		if (!can_madv_dontneed_vma(vma))
   477			return -EINVAL;
   478	
   479		zap_page_range(vma, start, end - start);

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

Download attachment ".config.gz" of type "application/gzip" (24716 bytes)