Doesn't do anything right now, but it's needed as a prep patch
to get the interfaces right.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
  block/blk-mq.h | 6 ++++++
  1 file changed, 6 insertions(+)

diff --git a/block/blk-mq.h b/block/blk-mq.h
index 889f0069dd80..79c300faa7ce 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h

@@ -80,6 +80,12 @@ static inline struct blk_mq_hw_ctx *blk_mq_map_queue(struct request_queue *q,
  	return q->queue_hw_ctx[set->map[0].mq_map[cpu]];
  }
  
+static inline struct blk_mq_hw_ctx *blk_mq_map_queue_type(struct request_queue *q,
+							  int type, int cpu)
+{
+	return blk_mq_map_queue(q, cpu);
+}
+
  /*
   * sysfs helpers
   */