diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index aedc15eabeac..0211e6f7b47a 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -21,6 +21,7 @@
  * @cdev: optional character interface for "device dax"
  * @private: dax driver private data
  * @flags: state and boolean properties
+ * @ops: operations for this device
  */
 struct dax_device {
 	struct inode inode;
@@ -476,6 +477,7 @@ static int dax_fs_init(void)
 static void dax_fs_exit(void)
 {
 	kern_unmount(dax_mnt);
+	rcu_barrier();
 	kmem_cache_destroy(dax_cache);
 }
 
diff --git a/fs/dax.c b/fs/dax.c
index ab0978739eaa..67a08a32fccb 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -389,7 +389,7 @@ static struct page *dax_busy_page(void *entry)
 }
 
 /*
- * dax_lock_mapping_entry - Lock the DAX entry corresponding to a page
+ * dax_lock_page - Lock the DAX entry corresponding to a page
  * @page: The page whose entry we want to lock
  *
  * Context: Process context.