missing proper initialization


Index: linux-2.6.21-rc5-mm4/include/linux/quicklist.h
===================================================================
--- linux-2.6.21-rc5-mm4.orig/include/linux/quicklist.h	2007-04-07 21:38:52.000000000 -0700
+++ linux-2.6.21-rc5-mm4/include/linux/quicklist.h	2007-04-07 21:51:13.000000000 -0700
@@ -14,7 +14,7 @@
 #ifdef CONFIG_QUICKLIST
 
 struct quicklist {
-	void *page;
+	struct list_head list;
 	int nr_pages;
 };
 
@@ -33,13 +33,14 @@
 static inline void *quicklist_alloc(int nr, gfp_t flags, void (*ctor)(void *))
 {
 	struct quicklist *q;
-	void **p = NULL;
+	struct list_head *p = NULL;
 
 	q =&get_cpu_var(quicklist)[nr];
-	p = q->page;
-	if (likely(p)) {
-		q->page = p[0];
-		p[0] = NULL;
+	if (likely(!list_empty(&q->list))) {
+		p = q->list.next;
+		list_del(p);
+		p->next = NULL;
+		p->prev = NULL;
 		q->nr_pages--;
 	}
 	put_cpu_var(quicklist);
@@ -66,8 +67,9 @@
 	}
 
 	q = &get_cpu_var(quicklist)[nr];
-	*(void **)p = q->page;
-	q->page = p;
+	if (!q->nr_pages)
+		INIT_LIST_HEAD(&q->list);
+	list_add((struct list_head *)q, &q->list);
 	q->nr_pages++;
 	put_cpu_var(quicklist);
 }
Index: linux-2.6.21-rc5-mm4/mm/quicklist.c
===================================================================
--- linux-2.6.21-rc5-mm4.orig/mm/quicklist.c	2007-04-07 21:38:52.000000000 -0700
+++ linux-2.6.21-rc5-mm4/mm/quicklist.c	2007-04-07 21:46:32.000000000 -0700
@@ -51,17 +51,15 @@
 {
 	long pages_to_free;
 	struct quicklist *q;
+	struct list_head *p;
 
 	q = &get_cpu_var(quicklist)[nr];
 	if (q->nr_pages > min_pages) {
 		pages_to_free = min_pages_to_free(q, min_pages, max_free);
 
-		while (pages_to_free > 0) {
-			/*
-			 * We pass a gfp_t of 0 to quicklist_alloc here
-			 * because we will never call into the page allocator.
-			 */
-			void *p = quicklist_alloc(nr, 0, NULL);
+		while (pages_to_free > 0 && !list_empty(&q->list)) {
+			p = q->list.prev;
+			list_del(p);
 
 			if (dtor)
 				dtor(p);