aboutsummaryrefslogtreecommitdiff
path: root/mm/internal.h
diff options
context:
space:
mode:
authorNick Piggin <nickpiggin@yahoo.com.au>2006-01-06 00:10:57 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:33:25 -0800
commit77a8a78834561398fb4cb1480afa7b0e80b1dd53 (patch)
treec58179bfb6c68fb6cad547852345150be039591f /mm/internal.h
parentc54ad30c784b84d0275152d0ca80985b21471811 (diff)
downloadvexpress-lsk-77a8a78834561398fb4cb1480afa7b0e80b1dd53.tar.gz
[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>
Diffstat (limited to 'mm/internal.h')
-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 */
+}
+