mm: export split_page()

This symbol will be used in the Hyper-V balloon driver to support 2M
allocations.

Signed-off-by: K.  Y.  Srinivasan <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 8fcced7..7ff1536 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1397,6 +1397,7 @@
 	for (i = 1; i < (1 << order); i++)
 		set_page_refcounted(page + i);
 }
+EXPORT_SYMBOL_GPL(split_page);
 
 static int __isolate_free_page(struct page *page, unsigned int order)
 {