4.2rc0 "bo don't have a message" flood.

[Dave Jones]

I was just browsing with chrome, and X locked up.
When I flipped to tty1, I saw a flood of these message..

kernel: [ 6800.937575] radeon 0000:01:00.0: bo ffff88080859ec00 don't has a 
mapping in vm ffff8808085c6600
kernel: [ 6800.948242] radeon 0000:01:00.0: bo ffff88080859ec00 don't has a 
mapping in vm ffff8808085c6600
kernel: [ 6800.948393] radeon 0000:01:00.0: bo ffff88080859ec00 don't has a 
mapping in vm ffff8808085c6600

over nad over..

This is with Linus' kernel tree from sometime yesterday.

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] 
Device 682c

        Dave