From 77a8a78834561398fb4cb1480afa7b0e80b1dd53 Mon Sep 17 00:00:00 2001
From: Nick Piggin <nickpiggin@yahoo.com.au>
Date: Fri, 6 Jan 2006 00:10:57 -0800
Subject: [PATCH] mm: set_page_refs opt

Inline set_page_refs.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 mm/internal.h | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

(limited to 'mm/internal.h')

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 */
+}
+
-- 
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