From: Avishay Traeger <atraeger@cs.sunysb.edu>
Date: Sun, 8 Jan 2006 09:00:58 +0000 (-0800)
Subject: [PATCH] set_page_count() macro safety
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=152194aaa6266d71dfee57882a23def339ef17a4;p=linux-beck.git

[PATCH] set_page_count() macro safety

Fix set_page_count() macro to handle complex arguments.

Signed-off-by: Avishay Traeger <atraeger@cs.sunysb.edu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 83c651f25188..7ff54242c5d7 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -308,7 +308,7 @@ struct page {
  */
 #define get_page_testone(p)	atomic_inc_and_test(&(p)->_count)
 
-#define set_page_count(p,v) 	atomic_set(&(p)->_count, v - 1)
+#define set_page_count(p,v) 	atomic_set(&(p)->_count, (v) - 1)
 #define __put_page(p)		atomic_dec(&(p)->_count)
 
 extern void FASTCALL(__page_cache_release(struct page *));