diff --git a/mm/swapfile.c b/mm/swapfile.c
index f0c7e4c..644f746 100644
--- a/mm/swapfile.c
+++ b/mm/swapfile.c
@@ -2354,6 +2354,7 @@ add_swap_extent(struct swap_info_struct *sis, unsigned long start_page,
 	list_add_tail(&new_se->list, &sis->first_swap_extent.list);
 	return 1;
 }
+EXPORT_SYMBOL_GPL(add_swap_extent);
 
 /*
  * A `swap extent' is a simple thing which maps a contiguous range of pages