[PATCH v2 2/3] block: add a helper to check elevator name

[Yu Kuai <yukuai1@xxxxxxxxxxxxxxx>]

From: Yu Kuai <yukuai3@xxxxxxxxxx>

The helper will be used in later patch to make sure wbt is not enabled
if default io scheduler is bfq.

Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
 block/elevator.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/block/elevator.h b/block/elevator.h
index 3f0593b3bf9d..2ddc738cae97 100644
--- a/block/elevator.h
+++ b/block/elevator.h
@@ -104,6 +104,11 @@ struct elevator_queue
 	DECLARE_HASHTABLE(hash, ELV_HASH_BITS);
 };
 
+static inline bool check_elevator_name(struct elevator_queue *elevator,
+				       const char *name)
+{
+	return elevator && !strcmp(elevator->type->elevator_name, name);
+}
 /*
  * block elevator interface
  */
-- 
2.31.1