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From:   Michael Tirado <mtirado418@gmail.com>
Date:   Sun, 21 Oct 2018 20:23:05 +0000
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        LKML <linux-kernel@vger.kernel.org>, kraxel@redhat.com,
        alexander.deucher@amd.com, christian.koenig@amd.com,
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On Mon, Oct 22, 2018 at 12:26 AM Dave Airlie <airlied@gmail.com> wrote:
>
> This shouldn't be necessary, did someone misbackport the mmap changes without:
>
> drm: set FMODE_UNSIGNED_OFFSET for drm files
>
> Dave.

The latest kernel I have had to patch was a 4.18-rc6.  I'll try with a
newer 4.19 and let you know if it decides to work.  If not I'll
prepare a test case for demonstration on qemu-system-i386.