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Subject: Re: [memcg:since-4.12 539/540] mm/compaction.c:469:8: error: implicit
 declaration of function 'pageblock_skip_persistent'
References: <201708190034.TmrRSDV7%fengguang.wu@intel.com>
From: Waiman Long <longman@redhat.com>
Message-ID: <fac0ae1a-7de3-bb98-53c8-f63f205f5c04@redhat.com>
Date: Fri, 18 Aug 2017 12:57:48 -0400
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In-Reply-To: <201708190034.TmrRSDV7%fengguang.wu@intel.com>
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To: kbuild test robot <fengguang.wu@intel.com>
Cc: kbuild-all@01.org, linux-mm@kvack.org, Michal Hocko <mhocko@suse.com>, Andrew Morton <akpm@linux-foundation.org>

On 08/18/2017 12:42 PM, kbuild test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mhocko/mm.git since-4.12
> head:   ba5e8c23db5729ebdbafad983b07434c829cf5b6
> commit: 500539d3686a835f6a9740ffc38bed5d74951a64 [539/540] debugobjects: make kmemleak ignore debug objects
> config: i386-randconfig-s0-08141822 (attached as .config)
> compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
> reproduce:
>         git checkout 500539d3686a835f6a9740ffc38bed5d74951a64
>         # save the attached .config to linux build tree
>         make ARCH=i386 
>
> All errors (new ones prefixed by >>):
>
>    mm/compaction.c: In function 'isolate_freepages_block':
>>> mm/compaction.c:469:8: error: implicit declaration of function 'pageblock_skip_persistent' [-Werror=implicit-function-declaration]
>        if (pageblock_skip_persistent(page, order)) {
>            ^~~~~~~~~~~~~~~~~~~~~~~~~
>>> mm/compaction.c:470:5: error: implicit declaration of function 'set_pageblock_skip' [-Werror=implicit-function-declaration]
>         set_pageblock_skip(page);
>         ^~~~~~~~~~~~~~~~~~
>    cc1: some warnings being treated as errors
>
> vim +/pageblock_skip_persistent +469 mm/compaction.c

It is not me. My patch doesn't touch any header file and
mm/compaction.c. So it can't cause this kind of errors.

Cheers,
Longman

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