[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 d0cadb3..92c3d9f 100644
--- a/arch/i386/mm/pageattr.c
+++ b/arch/i386/mm/pageattr.c
@@ -51,6 +51,13 @@
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 @@
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 @@
* 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);
}