diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index d376dc87716ebbd64666e10d7ab54805b0e28f76..add6391f3f8e95a32f6828b1d4104a4d358b7100 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -1627,7 +1627,7 @@ static int __pgpath_busy(struct pgpath *pgpath)
 {
 	struct request_queue *q = bdev_get_queue(pgpath->path.dev->bdev);
 
-	return dm_underlying_device_busy(q);
+	return blk_lld_busy(q);
 }
 
 /*
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 0e5f3441fcda458b0a7dc890e199668a08c9d07f..e7095ebb8d6460c5b4be5584e4d7db4c3bdab274 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -2006,12 +2006,6 @@ static void dm_request_fn(struct request_queue *q)
 	dm_put_live_table(md, srcu_idx);
 }
 
-int dm_underlying_device_busy(struct request_queue *q)
-{
-	return blk_lld_busy(q);
-}
-EXPORT_SYMBOL_GPL(dm_underlying_device_busy);
-
 static int dm_lld_busy(struct request_queue *q)
 {
 	int r;
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index fd23978d93fe35a91afab5f56d3611c0324d9ceb..51cc1deb7af3a38597a665300ef9405d8dbe3cef 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -605,9 +605,4 @@ static inline unsigned long to_bytes(sector_t n)
 	return (n << SECTOR_SHIFT);
 }
 
-/*-----------------------------------------------------------------
- * Helper for block layer and dm core operations
- *---------------------------------------------------------------*/
-int dm_underlying_device_busy(struct request_queue *q);
-
 #endif	/* _LINUX_DEVICE_MAPPER_H */