[PATCH] generic dispatch fixes

- Split elv_dispatch_insert() into two functions
- Rename rq_last_sector() to rq_end_sector()

Signed-off-by: Jens Axboe <axboe@suse.de>

2 files changed, 15 insertions, 2 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index 2c7b9154927a..a2e496f285a4 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -337,7 +337,7 @@ struct request_queue
         /*
          * Dispatch queue sorting
          */
-        sector_t                last_sector;
+        sector_t                end_sector;
         struct request          *boundary_rq;
         unsigned int            max_back_kb;
 
@@ -625,6 +625,17 @@ static inline void blkdev_dequeue_request(struct request *req)
 }
 
 /*
+ * This should be in elevator.h, but that requires pulling in rq and q
+ */
+static inline void elv_dispatch_add_tail(struct request_queue *q,
+                                         struct request *rq)
+{
+        q->end_sector = rq_end_sector(rq);
+        q->boundary_rq = rq;
+        list_add_tail(&rq->queuelist, &q->queue_head);
+}
+
+/*
  * Access functions for manipulating queue properties
  */
 extern request_queue_t *blk_init_queue_node(request_fn_proc *rfn,
diff --git a/include/linux/elevator.h b/include/linux/elevator.h
index 76f4f6920744..f9b5ec38121a 100644
--- a/include/linux/elevator.h
+++ b/include/linux/elevator.h
@@ -79,7 +79,7 @@ struct elevator_queue
 /*
  * block elevator interface
  */
-extern void elv_dispatch_insert(request_queue_t *, struct request *, int);
+extern void elv_dispatch_sort(request_queue_t *, struct request *);
 extern void elv_add_request(request_queue_t *, struct request *, int, int);
 extern void __elv_add_request(request_queue_t *, struct request *, int, int);
 extern int elv_merge(request_queue_t *, struct request **, struct bio *);
@@ -140,4 +140,6 @@ enum {
         ELV_MQUEUE_MUST,
 };
 
+#define rq_end_sector(rq)       ((rq)->sector + (rq)->nr_sectors)
+
 #endif