linux-kernel - Re: [PATCH v4 05/11] mm: thp: enable thp migration in generic path

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Message-ID: <CAMuHMdXQqdZpvtv9un8AoNu-9D5Aq+ZdoPjTrCqka1afi5RQsA@mail.gmail.com>
Date:   Wed, 15 Mar 2017 10:01:08 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Zi Yan <zi.yan@...rutgers.edu>
Cc:     kbuild test robot <lkp@...el.com>,
        "kbuild-all@...org" <kbuild-all@...org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Linux MM <linux-mm@...ck.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Minchan Kim <minchan@...nel.org>,
        Vlastimil Babka <vbabka@...e.cz>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Michal Hocko <mhocko@...nel.org>,
        Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
        dnellans@...dia.com
Subject: Re: [PATCH v4 05/11] mm: thp: enable thp migration in generic path

On Tue, Mar 14, 2017 at 10:55 PM, Zi Yan <zi.yan@...rutgers.edu> wrote:
>>>> include/linux/swapops.h:223:2: warning: missing braces around initializer [-Wmissing-braces]
>>      return (pmd_t){ 0 };
>>      ^
>>    include/linux/swapops.h:223:2: warning: (near initialization for '(anonymous).pmd') [-Wmissing-braces]
>
> I do not have any warning with gcc 6.3.0. This seems to be a GCC bug
> (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53119).

I guess you need

    return (pmd_t) { { 0, }};

to kill the warning.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds