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Subject: Re: [PATCH] mm, page_owner: only track migration if enabled
To: Arnd Bergmann <arnd@arndb.de>, Andrew Morton <akpm@linux-foundation.org>
References: <3209032.Njpu4mxStH@wuerfel>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>, Minchan Kim <minchan@kernel.org>,
        Sasha Levin <sasha.levin@oracle.com>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        Mel Gorman <mgorman@suse.de>, Michal Hocko <mhocko@suse.com>,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org
From: Vlastimil Babka <vbabka@suse.cz>
Message-ID: <56586356.3030308@suse.cz>
Date: Fri, 27 Nov 2015 15:06:14 +0100
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On 11/27/2015 02:58 PM, Arnd Bergmann wrote:
> The newly added code to print page ownership in dump_page fails
> to link when CONFIG_MIGRATION is disabled:
>
> mm/built-in.o: In function `print_page_owner':
> frame_vector.c:(.text+0x72358): undefined reference to `migrate_reason_names'
>
> This changes the two users of migrate_reason_names to first check
> CONFIG_MIGRATION, which avoids the error.
>
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> Fixes: cf7ec391dae4 ("mm, page_owner: dump page owner info from dump_page()")
> ---
> Found on yesterday's linux-next with ARM randconfig builds. The patch
> that introduced this is currently in Andrews tree.
>
> If you don't already have a fix, please apply this one on top, or fold
> it into the original commit.

Thanks. I posted a different one yesterday:
http://marc.info/?l=linux-mm&m=144853435200591&w=2