linux-kernel - Re: [PATCH 1/2] mm, thp: introduce dedicated transparent huge page allocation interfaces

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Date:   Thu, 19 Oct 2017 00:01:45 +0800
From:   kbuild test robot <lkp@...el.com>
To:     changbin.du@...el.com
Cc:     kbuild-all@...org, akpm@...ux-foundation.org, corbet@....net,
        hughd@...gle.com, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        Changbin Du <changbin.du@...el.com>
Subject: Re: [PATCH 1/2] mm, thp: introduce dedicated transparent huge page
 allocation interfaces

Hi Changbin,

[auto build test ERROR on mmotm/master]
[also build test ERROR on v4.14-rc5 next-20171017]
[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/changbin-du-intel-com/mm-thp-introduce-dedicated-transparent-huge-page-allocation-interfaces/20171018-230128
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: i386-randconfig-x001-201742 (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 error/warnings (new ones prefixed by >>):

   In file included from include/linux/balloon_compaction.h:48:0,
                    from drivers/virtio/virtio_balloon.c:29:
   include/linux/migrate.h: In function 'new_page_nodemask':
>> include/linux/migrate.h:49:10: error: implicit declaration of function 'alloc_transhuge_page_nodemask' [-Werror=implicit-function-declaration]
      return alloc_transhuge_page_nodemask(gfp_mask | GFP_TRANSHUGE,
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/migrate.h:49:10: warning: return makes pointer from integer without a cast [-Wint-conversion]
      return alloc_transhuge_page_nodemask(gfp_mask | GFP_TRANSHUGE,
             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
        preferred_nid, nodemask);
        ~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/alloc_transhuge_page_nodemask +49 include/linux/migrate.h

    33	
    34	static inline struct page *new_page_nodemask(struct page *page,
    35					int preferred_nid, nodemask_t *nodemask)
    36	{
    37		gfp_t gfp_mask = GFP_USER | __GFP_MOVABLE | __GFP_RETRY_MAYFAIL;
    38		unsigned int order = 0;
    39		struct page *new_page = NULL;
    40	
    41		if (PageHuge(page))
    42			return alloc_huge_page_nodemask(page_hstate(compound_head(page)),
    43					preferred_nid, nodemask);
    44	
    45		if (PageHighMem(page) || (zone_idx(page_zone(page)) == ZONE_MOVABLE))
    46			gfp_mask |= __GFP_HIGHMEM;
    47	
    48		if (thp_migration_supported() && PageTransHuge(page))
  > 49			return alloc_transhuge_page_nodemask(gfp_mask | GFP_TRANSHUGE,
    50					preferred_nid, nodemask);
    51		else
    52			return __alloc_pages_nodemask(gfp_mask, order,
    53					preferred_nid, nodemask);
    54	
    55		return new_page;
    56	}
    57	

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