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>

1 files changed, 0 insertions, 48 deletions

diff --git a/block/blk-core.c b/block/blk-core.c
index ea70e6c80cd3..435af2378614 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1010,54 +1010,6 @@ static void add_acct_request(struct request_queue *q, struct request *rq,
         __elv_add_request(q, rq, where);
 }
 
-/**
- * blk_insert_request - insert a special request into a request queue
- * @q:          request queue where request should be inserted
- * @rq:         request to be inserted
- * @at_head:    insert request at head or tail of queue
- * @data:       private data
- *
- * Description:
- *    Many block devices need to execute commands asynchronously, so they don't
- *    block the whole kernel from preemption during request execution.  This is
- *    accomplished normally by inserting aritficial requests tagged as
- *    REQ_TYPE_SPECIAL in to the corresponding request queue, and letting them
- *    be scheduled for actual execution by the request queue.
- *
- *    We have the option of inserting the head or the tail of the queue.
- *    Typically we use the tail for new ioctls and so forth.  We use the head
- *    of the queue for things like a QUEUE_FULL message from a device, or a
- *    host that is unable to accept a particular command.
- */
-void blk_insert_request(struct request_queue *q, struct request *rq,
-                        int at_head, void *data)
-{
-        int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK;
-        unsigned long flags;
-
-        /*
-         * tell I/O scheduler that this isn't a regular read/write (ie it
-         * must not attempt merges on this) and that it acts as a soft
-         * barrier
-         */
-        rq->cmd_type = REQ_TYPE_SPECIAL;
-
-        rq->special = data;
-
-        spin_lock_irqsave(q->queue_lock, flags);
-
-        /*
-         * If command is tagged, release the tag
-         */
-        if (blk_rq_tagged(rq))
-                blk_queue_end_tag(q, rq);
-
-        add_acct_request(q, rq, where);
-        __blk_run_queue(q);
-        spin_unlock_irqrestore(q->queue_lock, flags);
-}
-EXPORT_SYMBOL(blk_insert_request);
-
 static void part_round_stats_single(int cpu, struct hd_struct *part,
                                     unsigned long now)
 {