[rfc/repost] amdgpu/sync_file shared semaphores

[Daniel Vetter]

On Mon, Mar 20, 2017 at 05:03:03PM +1000, Dave Airlie wrote:
> This is a repost of the file_sync semaphore support.
> 
> The main difference in this patch is patch1 does a lot
> better at handling NULL fences in some places. The poll code
> and ioctls should handle ending up with fence being NULL properly now.

btw on this I realized that sync_file_get_fence can already return NULL,
so no problem really and no need for a dummy fence. Silly me :-)
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch