diff --git a/fs/direct-io.c b/fs/direct-io.c
index fb9aa16a7727..19aa448fde6a 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -554,7 +554,7 @@ static inline int dio_bio_reap(struct dio *dio, struct dio_submit *sdio)
  * filesystems that don't need it and also allows us to create the workqueue
  * late enough so the we can include s_id in the name of the workqueue.
  */
-static int sb_init_dio_done_wq(struct super_block *sb)
+int sb_init_dio_done_wq(struct super_block *sb)
 {
 	struct workqueue_struct *old;
 	struct workqueue_struct *wq = alloc_workqueue("dio/%s",
diff --git a/fs/internal.h b/fs/internal.h
index f4da3341b4a3..4fcf51766d4a 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -184,3 +184,6 @@ typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len,
 loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length,
 		unsigned flags, struct iomap_ops *ops, void *data,
 		iomap_actor_t actor);
+
+/* direct-io.c: */
+int sb_init_dio_done_wq(struct super_block *sb);