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From:   Michael Tirado <mtirado418@gmail.com>
Date:   Sun, 21 Oct 2018 22:20:31 +0000
Message-ID: <CAMkWEXMQekGAgub2bTmZh=kFsAT2oZoW+j=ksbRMo7+-cX+=aw@mail.gmail.com>
Subject: Re:
To:     Dave Airlie <airlied@gmail.com>
Cc:     Airlied@linux.ie, dri-devel@lists.freedesktop.org,
        LKML <linux-kernel@vger.kernel.org>, kraxel@redhat.com,
        alexander.deucher@amd.com, christian.koenig@amd.com,
        David1.zhou@amd.com, Hongbo.He@amd.com,
        Sean Paul <seanpaul@chromium.org>, Gustavo@padovan.org,
        maarten.lankhorst@linux.intel.com
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

--0000000000008b01e70578c8437d
Content-Type: text/plain; charset="UTF-8"

On Mon, Oct 22, 2018 at 1:50 AM Dave Airlie <airlied@gmail.com> wrote:
>
> On Mon, 22 Oct 2018 at 10:49, Michael Tirado <mtirado418@gmail.com> wrote:
> >
> > 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:
> If you have custom userspace software, make sure it's using
> AC_SYS_LARGEFILE or whatever the equivalant is in your build system.
>
> 64-bit file offsets are important.
>

That fixed it! -D_FILE_OFFSET_BITS=64 is the pre-processor define
needed. It's a bit more than unintuitive but I'm glad I don't need
this stupid patch anymore, Thanks.

In case anyone is further interested I have attached test program
since I spent the last hour or so chopping it up anyway :S   [ gcc -o
kms -D_FILE_OFFSET_BITS=64 main.c ]

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