Hi guys,

There is another TTM race bug that I'm going to fix but which doesn't 
yet affect any upstream code AFAICT.

The effect is that it may cause a deadlock in extremely rare cases if 
there are two processes validating at the same time, and one process 
needs to evict a buffer on which ttm_bo_block_reservation has been called.

I'll fix that up before we upstream any driver that allows simultaneous 
validation. AFAIK only openchrome and old Poulsbo did that. vmwgfx 
probably will at some point.

/Thomas




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