Because it's only used inside blk-mq-debugfs.c now.

Reviewed-by: Nilay Shroff <nilay@linux.ibm.com>
Signed-off-by: Yu Kuai <yukuai@fnnas.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Hannes Reinecke <hare@suse.de>
---
 block/blk-mq-debugfs.c | 2 +-
 block/blk-mq-debugfs.h | 5 -----
 2 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index 4fe164b6d648..11f00a868541 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -744,7 +744,7 @@ void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos)
 	rqos->debugfs_dir = NULL;
 }
 
-void blk_mq_debugfs_register_rqos(struct rq_qos *rqos)
+static void blk_mq_debugfs_register_rqos(struct rq_qos *rqos)
 {
 	struct request_queue *q = rqos->disk->queue;
 	const char *dir_name = rq_qos_id_to_name(rqos->id);
diff --git a/block/blk-mq-debugfs.h b/block/blk-mq-debugfs.h
index 54948a266889..d94daa66556b 100644
--- a/block/blk-mq-debugfs.h
+++ b/block/blk-mq-debugfs.h
@@ -34,7 +34,6 @@ void blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
 void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx);
 
 void blk_mq_debugfs_register_rq_qos(struct request_queue *q);
-void blk_mq_debugfs_register_rqos(struct rq_qos *rqos);
 void blk_mq_debugfs_unregister_rqos(struct rq_qos *rqos);
 #else
 static inline void blk_mq_debugfs_register(struct request_queue *q)
@@ -75,10 +74,6 @@ static inline void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hc
 {
 }
 
-static inline void blk_mq_debugfs_register_rqos(struct rq_qos *rqos)
-{
-}
-
 static inline void blk_mq_debugfs_register_rq_qos(struct request_queue *q)
 {
 }
-- 
2.51.0