Index: linux-2.6.21-rc4-mm1/mm/page-writeback.c
===================================================================
--- linux-2.6.21-rc4-mm1.orig/mm/page-writeback.c	2007-03-20 16:07:51.000000000 -0700
+++ linux-2.6.21-rc4-mm1/mm/page-writeback.c	2007-03-20 16:11:31.000000000 -0700
@@ -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;