linux-kernel - Re: [PATCH] mm: reset migratetype if the range spans two pageblocks

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Date:	Fri, 16 Oct 2015 18:59:57 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Xishi Qiu <qiuxishi@...wei.com>
Cc:	kbuild-all@...org, Andrew Morton <akpm@...ux-foundation.org>,
	Vlastimil Babka <vbabka@...e.cz>, Mel Gorman <mgorman@...e.de>,
	mhocko@...e.com, js1304@...il.com,
	Johannes Weiner <hannes@...xchg.org>,
	alexander.h.duyck@...hat.com, zhongjiang@...wei.com,
	Linux MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mm: reset migratetype if the range spans two pageblocks

Hi Xishi,

[auto build test ERROR on v4.3-rc5 -- if it's inappropriate base, please suggest rules for selecting the more suitable base]

url:    https://github.com/0day-ci/linux/commits/Xishi-Qiu/mm-reset-migratetype-if-the-range-spans-two-pageblocks/20151016-180949
config: i386-randconfig-s1-201541 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

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

   mm/page_alloc.c: In function '__free_one_page':
>> mm/page_alloc.c:731:3: error: implicit declaration of function 'change_pageblock_range' [-Werror=implicit-function-declaration]
      change_pageblock_range(page, order, migratetype);
      ^
   mm/page_alloc.c: At top level:
>> mm/page_alloc.c:1515:13: warning: conflicting types for 'change_pageblock_range'
    static void change_pageblock_range(struct page *pageblock_page,
                ^
>> mm/page_alloc.c:1515:13: error: static declaration of 'change_pageblock_range' follows non-static declaration
   mm/page_alloc.c:731:3: note: previous implicit declaration of 'change_pageblock_range' was here
      change_pageblock_range(page, order, migratetype);
      ^
   cc1: some warnings being treated as errors

vim +/change_pageblock_range +731 mm/page_alloc.c

   725	
   726		list_add(&page->lru, &zone->free_area[order].free_list[migratetype]);
   727	out:
   728		zone->free_area[order].nr_free++;
   729		/* If the range spans two pageblocks, reset the migratetype. */
   730		if (order > pageblock_order)
 > 731			change_pageblock_range(page, order, migratetype);
   732	}
   733	
   734	static inline int free_pages_check(struct page *page)

---
0-DAY kernel test infrastructure                Open Source Technology Center
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