[PATCH] ide io scheduler thing

IDE must use blk_queue_empty() and not do a list_empty() on the
(potentially only) dispatch queue.  This took quite a while to find
while debugging a new io scheduler...

drivers/ide/ide.c

@@ -980,7 +980,7 @@ static inline ide_drive_t *choose_drive (ide_hwgroup_t *hwgroup)
 	best = NULL;
 	drive = hwgroup->drive;
 	do {
-		if (!list_empty(&drive->queue.queue_head) && (!drive->sleep || time_after_eq(jiffies, drive->sleep))) {
+		if (!blk_queue_empty(&drive->queue) && (!drive->sleep || time_after_eq(jiffies, drive->sleep))) {
 			if (!best
 			 || (drive->sleep && (!best->sleep || 0 < (signed long)(best->sleep - drive->sleep)))
 			 || (!best->sleep && 0 < (signed long)(WAKEUP(best) - WAKEUP(drive))))