[PATCH] i386: pageattr remove __put_page

Stop using __put_page and page_count in i386 pageattr.c

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/i386/mm/pageattr.c b/arch/i386/mm/pageattr.c
index d0cadb33b54c1088f4eb609a28409fecf7ed7c74..92c3d9f0e7314f984fdd60a3ffbbfd3b01259edc 100644 (file)
--- a/arch/i386/mm/pageattr.c
+++ b/arch/i386/mm/pageattr.c
@@ -51,6 +51,13 @@ static struct page *split_large_page(unsigned long address, pgprot_t prot,
        if (!base) 
                return NULL;
 
+       /*
+        * page_private is used to track the number of entries in
+        * the page table page that have non standard attributes.
+        */
+       SetPagePrivate(base);
+       page_private(base) = 0;
+
        address = __pa(address);
        addr = address & LARGE_PAGE_MASK; 
        pbase = (pte_t *)page_address(base);
@@ -143,11 +150,12 @@ __change_page_attr(struct page *page, pgprot_t prot)
                                return -ENOMEM;
                        set_pmd_pte(kpte,address,mk_pte(split, ref_prot));
                        kpte_page = split;
-               }       
-               get_page(kpte_page);
+               }
+               page_private(kpte_page)++;
        } else if ((pte_val(*kpte) & _PAGE_PSE) == 0) { 
                set_pte_atomic(kpte, mk_pte(page, PAGE_KERNEL));
-               __put_page(kpte_page);
+               BUG_ON(page_private(kpte_page) == 0);
+               page_private(kpte_page)--;
        } else
                BUG();
 
@@ -157,10 +165,8 @@ __change_page_attr(struct page *page, pgprot_t prot)
         * replace it with a largepage.
         */
        if (!PageReserved(kpte_page)) {
-               /* memleak and potential failed 2M page regeneration */
-               BUG_ON(!page_count(kpte_page));
-
-               if (cpu_has_pse && (page_count(kpte_page) == 1)) {
+               if (cpu_has_pse && (page_private(kpte_page) == 0)) {
+                       ClearPagePrivate(kpte_page);
                        list_add(&kpte_page->lru, &df_list);
                        revert_page(kpte_page, address);
                }