[Intel-gfx] [PATCH 24/30] drm/i915: Refactor pwrite/pread to use single copy of get_user_pages

[Eric Anholt]

On Tue, 12 Apr 2011 21:31:52 +0100, Chris Wilson <chris at chris-wilson.co.uk> wrote:
> Replace the three nearly identical copies of the code with a single
> function. And take advantage of the opportunity to do some
> micro-optimisation: avoid the vmalloc if at all possible and also avoid
> dropping the lock unless we are forced to acquire the mm semaphore.

Could we get some performance numbers in patches that add code for
performance?
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