x86: use the same pgd_list for PAE and 64-bit

Use a standard list threaded through page->lru for maintaining the pgd
list on PAE.  This is the same as 64-bit, and seems saner than using a
non-standard list via page->index.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

1 files changed, 5 insertions, 14 deletions

diff --git a/arch/x86/mm/pgtable_32.c b/arch/x86/mm/pgtable_32.c
index 5ca3552474ae..2ae5999a795a 100644
--- a/arch/x86/mm/pgtable_32.c
+++ b/arch/x86/mm/pgtable_32.c
@@ -205,27 +205,18 @@ struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
  * vmalloc faults work because attached pagetables are never freed.
  * -- wli
  */
-DEFINE_SPINLOCK(pgd_lock);
-struct page *pgd_list;
-
 static inline void pgd_list_add(pgd_t *pgd)
 {
         struct page *page = virt_to_page(pgd);
-        page->index = (unsigned long)pgd_list;
-        if (pgd_list)
-                set_page_private(pgd_list, (unsigned long)&page->index);
-        pgd_list = page;
-        set_page_private(page, (unsigned long)&pgd_list);
+
+        list_add(&page->lru, &pgd_list);
 }
 
 static inline void pgd_list_del(pgd_t *pgd)
 {
-        struct page *next, **pprev, *page = virt_to_page(pgd);
-        next = (struct page *)page->index;
-        pprev = (struct page **)page_private(page);
-        *pprev = next;
-        if (next)
-                set_page_private(next, (unsigned long)pprev);
+        struct page *page = virt_to_page(pgd);
+
+        list_del(&page->lru);
 }