[Intel-gfx] Slaughter the thundering i915_wait_request, v3?

[Chris Wilson]

The biggest change is the revised bottom-half for handling user
interupts (now we use the waiter on the oldest request as the
bottom-half). That and the review feedback on Daniel on handling resets
(and hangcheck) during the wait. Oh, and some interrupt/seqno timing review.

Available from
http://cgit.freedesktop.org/~ickle/linux-2.6/log/?h=breadcrumbs
-Chris