[linux-next] Errors while "make htmldocs" in linux-next.

[Masanari Iida]

On linux-next ( next-2160706),  following errors happen these days
while running "make htmldocs"

  HTML    Documentation/DocBook/device-drivers.html
/home/iida/Repo/linux-next/Documentation/DocBook/device-drivers.aux.xml:28799:
element refentry: validity error : ID
API-reservation-object-reserve-shared already defined
<refentry id="API-reservation-object-reserve-shared">
                                                    ^
/home/iida/Repo/linux-next/Documentation/DocBook/device-drivers.aux.xml:28849:
element refentry: validity error : ID
API-reservation-object-add-shared-fence already defined
<refentry id="API-reservation-object-add-shared-fence">

As I bisect the issue,  the first bad commit is following.

commit 2cca45574007b4a77fa5f63ea45d664510cec22a
Merge: bb4cec0222f9 e83950816367
Author: Dave Airlie <airlied@xxxxxxxxxx>
Date:   Thu Jun 9 11:19:28 2016 +1000

    Merge tag 'topic/drm-misc-2016-06-07' of
git://anongit.freedesktop.org/drm-intel into drm-next

The actual change which cause this warning came from following.

commit eae1760fc838d5f569a80939f72483f02ac049c5
Author: Rob Clark <robdclark@xxxxxxxxx>
Date:   Thu Mar 31 16:26:52 2016 -0400

    doc: update/fixup dma-buf related DocBook

    Split out dma-buf related parts into their own section, add missing
    files, and write a bit of overview about how it all fits together.

    Signed-off-by: Rob Clark <robdclark@xxxxxxxxx>
    Signed-off-by: Sumit Semwal <sumit.semwal@xxxxxxxxxx>

FYI, This issue does not exist on 4.7-rc6.

Masanari Iida