use pgd_list_add/pgd_list_del

Index: 2.6-git/include/asm-x86_64/pgalloc.h
===================================================================
@@ -65,7 +65,6 @@ static inline void pgd_ctor(void *x)
 {
 	unsigned boundary;
 	pgd_t *pgd = x;
-	struct page *page = virt_to_page(pgd);
 
 	/*
 	 * Copy kernel pointers in from init.

@@ -75,19 +74,14 @@ static inline void pgd_ctor(void *x)
 		init_level4_pgt + boundary,
 		(PTRS_PER_PGD - boundary) * sizeof(pgd_t));
 
-	spin_lock(&pgd_lock);
-	list_add(&page->lru, &pgd_list);
-	spin_unlock(&pgd_lock);
+	pgd_list_add(pgd);
 }
 
 static inline void pgd_dtor(void *x)
 {
 	pgd_t *pgd = x;
-	struct page *page = virt_to_page(pgd);
 
-        spin_lock(&pgd_lock);
-	list_del(&page->lru);
-	spin_unlock(&pgd_lock);
+	pgd_list_del(pgd);
 }
 
 static inline pgd_t *pgd_alloc(struct mm_struct *mm)