Index: linux-2.6.21-rc2-mm2/mm/page-writeback.c
===================================================================
--- linux-2.6.21-rc2-mm2.orig/mm/page-writeback.c	2007-03-06 12:07:43.000000000 -0800
+++ linux-2.6.21-rc2-mm2/mm/page-writeback.c	2007-03-06 12:08:19.000000000 -0800
@@ -175,7 +175,6 @@ get_dirty_limits(struct dirty_limits *dl
 	int unmapped_ratio;
 	long background;
 	long dirty;
-	unsigned long available_memory = determine_dirtyable_memory();
   	unsigned long dirtyable_memory;
   	unsigned long nr_mapped;
    	struct task_struct *tsk;