linux-kernel - Re: [PATCH v2 10/10] mm: remove SWAP

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Date:   Fri, 17 Mar 2017 02:54:12 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Minchan Kim <minchan@...nel.org>
Cc:     kbuild-all@...org, Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        kernel-team@....com, Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...e.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
        Minchan Kim <minchan@...nel.org>
Subject: Re: [PATCH v2 10/10] mm: remove SWAP_[SUCCESS|AGAIN|FAIL]

Hi Minchan,

[auto build test ERROR on mmotm/master]
[also build test ERROR on next-20170310]
[cannot apply to v4.11-rc2]
[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/Minchan-Kim/make-try_to_unmap-simple/20170317-020635
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: i386-tinyconfig (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/rmap.c: In function 'try_to_unmap_one':
>> mm/rmap.c:1417:11: error: 'SWAP_FAIL' undeclared (first use in this function)
        ret = SWAP_FAIL;
              ^~~~~~~~~
   mm/rmap.c:1417:11: note: each undeclared identifier is reported only once for each function it appears in

vim +/SWAP_FAIL +1417 mm/rmap.c

^1da177e Linus Torvalds 2005-04-16  1411  			/*
^1da177e Linus Torvalds 2005-04-16  1412  			 * Store the swap location in the pte.
^1da177e Linus Torvalds 2005-04-16  1413  			 * See handle_pte_fault() ...
^1da177e Linus Torvalds 2005-04-16  1414  			 */
efeba3bd Minchan Kim    2017-03-10  1415  			if (unlikely(PageSwapBacked(page) != PageSwapCache(page))) {
efeba3bd Minchan Kim    2017-03-10  1416  				WARN_ON_ONCE(1);
3154f021 Minchan Kim    2017-03-10 @1417  				ret = SWAP_FAIL;
3154f021 Minchan Kim    2017-03-10  1418  				page_vma_mapped_walk_done(&pvmw);
3154f021 Minchan Kim    2017-03-10  1419  				break;
3154f021 Minchan Kim    2017-03-10  1420  			}

:::::: The code at line 1417 was first introduced by commit
:::::: 3154f021001fba264cc2cba4c4ff4bfb5a3e2f92 mm: fix lazyfree BUG_ON check in try_to_unmap_one()

:::::: TO: Minchan Kim <minchan@...nel.org>
:::::: CC: Johannes Weiner <hannes@...xchg.org>

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