ttm: merge ttm_backend & ttm_tt, introduce ttm dma allocator V7

[Jerome Glisse]

On Fri, Nov 18, 2011 at 08:04:47PM -0500, j.glisse at gmail.com wrote:
> Important fix to patch 14, fix accounting of ghost bo. When creating a
> ghost bo we don't account it, so set its acc_size to 0 so that when
> ghost is release we don't overfree.
> 
> I wonder how i didn't run into this before.
> 
> Patch are also at
> 
> http://people.freedesktop.org/~glisse/ttmdma/
> 
> Cheers,
> Jerome
> 

Oh i forgot to add some of the reviewed by, i updated patches on fdo,
i don't resend to the ml.

Cheers,
Jerome