[PATCH] update blk_execute_rq to take an at_head parameter

Original From: Mike Christie <michaelc@cs.wisc.edu>

Modified to split out block changes (this patch) and SCSI pieces.

Signed-off-by: Jens Axboe <axboe@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/block/ll_rw_blk.c b/drivers/block/ll_rw_blk.c
index 874e46fc3748..d260a2ce9a70 100644
--- a/drivers/block/ll_rw_blk.c
+++ b/drivers/block/ll_rw_blk.c
@@ -2269,13 +2269,14 @@ void blk_execute_rq_nowait(request_queue_t *q, struct gendisk *bd_disk,
  * @q:          queue to insert the request in
  * @bd_disk:    matching gendisk
  * @rq:         request to insert
+ * @at_head:    insert request at head or tail of queue
  *
  * Description:
  *    Insert a fully prepared request at the back of the io scheduler queue
  *    for execution.
  */
 int blk_execute_rq(request_queue_t *q, struct gendisk *bd_disk,
-                   struct request *rq)
+                   struct request *rq, int at_head)
 {
         DECLARE_COMPLETION(wait);
         char sense[SCSI_SENSE_BUFFERSIZE];
@@ -2294,7 +2295,7 @@ int blk_execute_rq(request_queue_t *q, struct gendisk *bd_disk,
         }
 
         rq->waiting = &wait;
-        blk_execute_rq_nowait(q, bd_disk, rq, 0, blk_end_sync_rq);
+        blk_execute_rq_nowait(q, bd_disk, rq, at_head, blk_end_sync_rq);
         wait_for_completion(&wait);
         rq->waiting = NULL;
 
@@ -2361,7 +2362,7 @@ int blkdev_scsi_issue_flush_fn(request_queue_t *q, struct gendisk *disk,
         rq->data_len = 0;
         rq->timeout = 60 * HZ;
 
-        ret = blk_execute_rq(q, disk, rq);
+        ret = blk_execute_rq(q, disk, rq, 0);
 
         if (ret && error_sector)
                 *error_sector = rq->sector;