diff --git a/[refs] b/[refs]
index a7e2bd08be8f..14bd569cdb05 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 182f514f883abb5f942c94e61c371c4b406352d4
+refs/heads/master: 91913a2942d2b582c40673956dec1a9c71d32fe4
diff --git a/trunk/mm/page-writeback.c b/trunk/mm/page-writeback.c
index 363ba7082ef5..5e39858880f3 100644
--- a/trunk/mm/page-writeback.c
+++ b/trunk/mm/page-writeback.c
@@ -95,6 +95,8 @@ unsigned long vm_dirty_bytes;
  */
 unsigned int dirty_writeback_interval = 5 * 100; /* centiseconds */
 
+EXPORT_SYMBOL_GPL(dirty_writeback_interval);
+
 /*
  * The longest time for which data is allowed to remain dirty
  */