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The gen2 w/a buffer is stuffed into the same slot as the gen5+ scratch buffer. If we pass in the size we want to allocate for the scratch buffer, both callers can use the same routine. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1467390209-3576-11-git-send-email-chris@chris-wilson.co.uk