[PATCH] convert s390 page handling macros to functions

Convert s390 page handling macros to functions.  In particular this fixes a
problem with s390's SetPageUptodate macro which uses its input parameter
twice which again can cause subtle bugs.

[akpm@osdl.org: build fix]
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 9d7921d..4830a3b 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -128,12 +128,11 @@
 
 #define PageUptodate(page)	test_bit(PG_uptodate, &(page)->flags)
 #ifdef CONFIG_S390
-#define SetPageUptodate(_page) \
-	do {								      \
-		struct page *__page = (_page);				      \
-		if (!test_and_set_bit(PG_uptodate, &__page->flags))	      \
-			page_test_and_clear_dirty(_page);		      \
-	} while (0)
+static inline void SetPageUptodate(struct page *page)
+{
+	if (!test_and_set_bit(PG_uptodate, &page->flags))
+		page_test_and_clear_dirty(page);
+}
 #else
 #define SetPageUptodate(page)	set_bit(PG_uptodate, &(page)->flags)
 #endif