Allow ttm_buffer_object without resource

[Daniel Vetter]

On Tue, Mar 29, 2022 at 01:02:32PM +0200, Christian König wrote:
> Hi guys,
> 
> this patch set cleans up the handling of TTM buffer objects quite a bit
> by allowing to create them without allocating a ttm_resource as well.
> 
> That's not only cleaner in general, but also a necessary prerequisite for
> quite a number of related work.

Maybe there's some threads I missed, but I can't really guess what this
could be useful for without even a hint.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch