X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=mm%2Finternal.h;fp=mm%2Finternal.h;h=17256bb2f4ef23bfef9ec32856057124149f414d;hb=64ba3f394c830ec48a1c31b53dcae312c56f1604;hp=d20e3cc4aef02d6d299c14cc52d5f2e875bbdb79;hpb=be1e6109ac94a859551f8e1774eb9a8469fe055c;p=linux-2.6.git

diff --git a/mm/internal.h b/mm/internal.h
index d20e3cc4a..17256bb2f 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -8,33 +8,23 @@
  * as published by the Free Software Foundation; either version
  * 2 of the License, or (at your option) any later version.
  */
-#ifndef __MM_INTERNAL_H
-#define __MM_INTERNAL_H
 
-#include <linux/mm.h>
-
-static inline void set_page_count(struct page *page, int v)
-{
-	atomic_set(&page->_count, v);
-}
-
-/*
- * Turn a non-refcounted page (->_count == 0) into refcounted with
- * a count of one.
- */
-static inline void set_page_refcounted(struct page *page)
+static inline void set_page_refs(struct page *page, int order)
 {
-	BUG_ON(PageCompound(page) && page_private(page) != (unsigned long)page);
-	BUG_ON(atomic_read(&page->_count));
+#ifdef CONFIG_MMU
 	set_page_count(page, 1);
-}
+#else
+	int i;
 
-static inline void __put_page(struct page *page)
-{
-	atomic_dec(&page->_count);
+	/*
+	 * We need to reference all the pages for this order, otherwise if
+	 * anyone accesses one of the pages with (get/put) it will be freed.
+	 * - eg: access_process_vm()
+	 */
+	for (i = 0; i < (1 << order); i++)
+		set_page_count(page + i, 1);
+#endif /* CONFIG_MMU */
 }
 
 extern void fastcall __init __free_pages_bootmem(struct page *page,
 						unsigned int order);
-
-#endif