[PATCH] drm/i915: clarify reasoning for the access_ok call

[Chris Wilson]

On Mon, Mar 11, 2013 at 02:04:51PM -0700, Kees Cook wrote:
> Probably not. It just seemed like the existing comment was
> insufficient after the removal of the redundant VERIFY_READ check that
> happened recently.

That's certainly true, the remaining comment is a little cryptic.
Something more like:

/* We need to check that we can read the entire relocation array, but
 * as we may need to update the presumed_offsets upon execution, we
 * need to check now for full write access.
 */
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre