Merge with git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git

2 files changed, 22 insertions, 32 deletions

diff --git a/block/elevator.c b/block/elevator.c
index c9f424d5399c..96a61e029ce5 100644
--- a/block/elevator.c
+++ b/block/elevator.c
@@ -139,35 +139,16 @@ static int elevator_attach(request_queue_t *q, struct elevator_type *e,
 
 static char chosen_elevator[16];
 
-static void elevator_setup_default(void)
+static int __init elevator_setup(char *str)
 {
-	struct elevator_type *e;
-
-	/*
-	 * If default has not been set, use the compiled-in selection.
-	 */
-	if (!chosen_elevator[0])
-		strcpy(chosen_elevator, CONFIG_DEFAULT_IOSCHED);
-
 	/*
 	 * Be backwards-compatible with previous kernels, so users
 	 * won't get the wrong elevator.
 	 */
-	if (!strcmp(chosen_elevator, "as"))
+	if (!strcmp(str, "as"))
 		strcpy(chosen_elevator, "anticipatory");
-
- 	/*
- 	 * If the given scheduler is not available, fall back to the default
- 	 */
- 	if ((e = elevator_find(chosen_elevator)))
-		elevator_put(e);
 	else
- 		strcpy(chosen_elevator, CONFIG_DEFAULT_IOSCHED);
-}
-
-static int __init elevator_setup(char *str)
-{
-	strncpy(chosen_elevator, str, sizeof(chosen_elevator) - 1);
+		strncpy(chosen_elevator, str, sizeof(chosen_elevator) - 1);
 	return 0;
 }
 
@@ -184,14 +165,16 @@ int elevator_init(request_queue_t *q, char *name)
 	q->end_sector = 0;
 	q->boundary_rq = NULL;
 
-	elevator_setup_default();
+	if (name && !(e = elevator_get(name)))
+		return -EINVAL;
 
-	if (!name)
-		name = chosen_elevator;
+	if (!e && *chosen_elevator && !(e = elevator_get(chosen_elevator)))
+		printk("I/O scheduler %s not found\n", chosen_elevator);
 
-	e = elevator_get(name);
-	if (!e)
-		return -EINVAL;
+	if (!e && !(e = elevator_get(CONFIG_DEFAULT_IOSCHED))) {
+		printk("Default I/O scheduler not found, using no-op\n");
+		e = elevator_get("noop");
+	}
 
 	eq = kmalloc(sizeof(struct elevator_queue), GFP_KERNEL);
 	if (!eq) {
@@ -669,8 +652,10 @@ int elv_register(struct elevator_type *e)
 	spin_unlock_irq(&elv_list_lock);
 
 	printk(KERN_INFO "io scheduler %s registered", e->elevator_name);
-	if (!strcmp(e->elevator_name, chosen_elevator))
-		printk(" (default)");
+	if (!strcmp(e->elevator_name, chosen_elevator) ||
+			(!*chosen_elevator &&
+			 !strcmp(e->elevator_name, CONFIG_DEFAULT_IOSCHED)))
+				printk(" (default)");
 	printk("\n");
 	return 0;
 }
diff --git a/block/ll_rw_blk.c b/block/ll_rw_blk.c
index 8e27d0ab0d7c..f9fc07efd2da 100644
--- a/block/ll_rw_blk.c
+++ b/block/ll_rw_blk.c
@@ -304,6 +304,7 @@ static inline void rq_init(request_queue_t *q, struct request *rq)
  * blk_queue_ordered - does this queue support ordered writes
  * @q:        the request queue
  * @ordered:  one of QUEUE_ORDERED_*
+ * @prepare_flush_fn: rq setup helper for cache flush ordered writes
  *
  * Description:
  *   For journalled file systems, doing ordered writes on a commit
@@ -332,6 +333,7 @@ int blk_queue_ordered(request_queue_t *q, unsigned ordered,
 		return -EINVAL;
 	}
 
+	q->ordered = ordered;
 	q->next_ordered = ordered;
 	q->prepare_flush_fn = prepare_flush_fn;
 
@@ -662,7 +664,7 @@ EXPORT_SYMBOL(blk_queue_bounce_limit);
  *    Enables a low level driver to set an upper limit on the size of
  *    received requests.
  **/
-void blk_queue_max_sectors(request_queue_t *q, unsigned short max_sectors)
+void blk_queue_max_sectors(request_queue_t *q, unsigned int max_sectors)
 {
 	if ((max_sectors << 9) < PAGE_CACHE_SIZE) {
 		max_sectors = 1 << (PAGE_CACHE_SHIFT - 9);
@@ -2577,6 +2579,8 @@ void disk_round_stats(struct gendisk *disk)
 	disk->stamp = now;
 }
 
+EXPORT_SYMBOL_GPL(disk_round_stats);
+
 /*
  * queue lock must be held
  */
@@ -2632,6 +2636,7 @@ EXPORT_SYMBOL(blk_put_request);
 /**
  * blk_end_sync_rq - executes a completion event on a request
  * @rq: request to complete
+ * @error: end io status of the request
  */
 void blk_end_sync_rq(struct request *rq, int error)
 {
@@ -3153,7 +3158,7 @@ static int __end_that_request_first(struct request *req, int uptodate,
 	if (blk_fs_request(req) && req->rq_disk) {
 		const int rw = rq_data_dir(req);
 
-		__disk_stat_add(req->rq_disk, sectors[rw], nr_bytes >> 9);
+		disk_stat_add(req->rq_disk, sectors[rw], nr_bytes >> 9);
 	}
 
 	total_bytes = bio_nbytes = 0;