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Both the ->dispatch_execbuffer and ->emit_bb_start callbacks do exactly the same thing, add MI_BATCHBUFFER_START to the request's ringbuffer - we need only one vfunc. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1469432687-22756-20-git-send-email-chris@chris-wilson.co.uk Link: http://patchwork.freedesktop.org/patch/msgid/1470174640-18242-10-git-send-email-chris@chris-wilson.co.uk