block: Remove elevator_change()

Since commit 84253394 ("remove the mg_disk driver") removed the
only caller of elevator_change(), also remove the elevator_change()
function itself.
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Markus Trippelsdorf <markus@trippelsdorf.de>
Signed-off-by: Jens Axboe <axboe@fb.com>

block/elevator.c

@@ -1088,19 +1088,6 @@ static int __elevator_change(struct request_queue *q, const char *name)
 	return elevator_switch(q, e);
 }
 
-int elevator_change(struct request_queue *q, const char *name)
-{
-	int ret;
-
-	/* Protect q->elevator from elevator_init() */
-	mutex_lock(&q->sysfs_lock);
-	ret = __elevator_change(q, name);
-	mutex_unlock(&q->sysfs_lock);
-
-	return ret;
-}
-EXPORT_SYMBOL(elevator_change);
-
 static inline bool elv_support_iosched(struct request_queue *q)
 {
 	if (q->mq_ops && q->tag_set && (q->tag_set->flags &

include/linux/elevator.h

@@ -214,7 +214,6 @@ extern ssize_t elv_iosched_store(struct request_queue *, const char *, size_t);
 
 extern int elevator_init(struct request_queue *, char *);
 extern void elevator_exit(struct request_queue *, struct elevator_queue *);
-extern int elevator_change(struct request_queue *, const char *);
 extern bool elv_bio_merge_ok(struct request *, struct bio *);
 extern struct elevator_queue *elevator_alloc(struct request_queue *,
 					struct elevator_type *);