linux-kernel - Re: [PATCH 02/12] mm: introduce page_check

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Message-ID: <201701250909.CwXslKN1%fengguang.wu@intel.com>
Date:   Wed, 25 Jan 2017 09:59:54 +0800
From:   kbuild test robot <lkp@...el.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc:     kbuild-all@...org, Andrea Arcangeli <aarcange@...hat.com>,
        Hugh Dickins <hughd@...gle.com>,
        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 02/12] mm: introduce page_check_walk()

Hi Kirill,

[auto build test ERROR on mmotm/master]
[also build test ERROR on v4.10-rc5 next-20170124]
[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/Fix-few-rmap-related-THP-bugs/20170125-081918
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: sparc64-allnoconfig (attached as .config)
compiler: sparc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
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=sparc64 

All error/warnings (new ones prefixed by >>):

   mm/page_check.c: In function 'check_pte':
>> mm/page_check.c:48:38: error: invalid operands to binary - (have 'void *' and 'struct page *')
      if (migration_entry_to_page(entry) - pcw->page >=
                                         ^ ~~~~~~~~~
>> mm/page_check.c:52:38: warning: comparison of distinct pointer types lacks a cast
      if (migration_entry_to_page(entry) < pcw->page)
                                         ^

vim +48 mm/page_check.c

    42			swp_entry_t entry;
    43			if (!is_swap_pte(*pcw->pte))
    44				return false;
    45			entry = pte_to_swp_entry(*pcw->pte);
    46			if (!is_migration_entry(entry))
    47				return false;
  > 48			if (migration_entry_to_page(entry) - pcw->page >=
    49					hpage_nr_pages(pcw->page)) {
    50				return false;
    51			}
  > 52			if (migration_entry_to_page(entry) < pcw->page)
    53				return false;
    54		} else {
    55			if (!pte_present(*pcw->pte))

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

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