block, sx8: kill blk_insert_request()

The only user left for blk_insert_request() is sx8 and it can be
trivially switched to use blk_execute_rq_nowait() - special requests
aren't included in io stat and sx8 doesn't use block layer tagging.
Switch sx8 and kill blk_insert_requeset().

This patch doesn't introduce any functional difference.

Only compile tested.

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/drivers/block/sx8.c b/drivers/block/sx8.c
index b70f0fc..e7472f5 100644
--- a/drivers/block/sx8.c
+++ b/drivers/block/sx8.c
@@ -619,8 +619,10 @@
 	       host->state == HST_DEV_SCAN);
 	spin_unlock_irq(&host->lock);
 
-	DPRINTK("blk_insert_request, tag == %u\n", idx);
-	blk_insert_request(host->oob_q, crq->rq, 1, crq);
+	DPRINTK("blk_execute_rq_nowait, tag == %u\n", idx);
+	crq->rq->cmd_type = REQ_TYPE_SPECIAL;
+	crq->rq->special = crq;
+	blk_execute_rq_nowait(host->oob_q, NULL, crq->rq, true, NULL);
 
 	return 0;
 
@@ -658,8 +660,10 @@
 	BUG_ON(rc < 0);
 	crq->msg_bucket = (u32) rc;
 
-	DPRINTK("blk_insert_request, tag == %u\n", idx);
-	blk_insert_request(host->oob_q, crq->rq, 1, crq);
+	DPRINTK("blk_execute_rq_nowait, tag == %u\n", idx);
+	crq->rq->cmd_type = REQ_TYPE_SPECIAL;
+	crq->rq->special = crq;
+	blk_execute_rq_nowait(host->oob_q, NULL, crq->rq, true, NULL);
 
 	return 0;
 }