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-rw-r--r--mm/internal.h19
1 files changed, 17 insertions, 2 deletions
diff --git a/mm/internal.h b/mm/internal.h
index 6bf134e8fb3..85004f540e3 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -9,5 +9,20 @@
* 2 of the License, or (at your option) any later version.
*/
-/* page_alloc.c */
-extern void set_page_refs(struct page *page, int order);
+static inline void set_page_refs(struct page *page, int order)
+{
+#ifdef CONFIG_MMU
+ set_page_count(page, 1);
+#else
+ int i;
+
+ /*
+ * 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 */
+}
+