From: Christoph Lameter <clameter@sgi.com>
Subject: Page flags: Add PAGEFLAGS_FALSE
Turns out that there a number of times that a flag is simply always returning 0.
Define a macro for that.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
include/linux/page-flags.h | 19 +++++++------------
1 file changed, 7 insertions(+), 12 deletions(-)
Index: linux-2.6.25-rc5-mm1/include/linux/page-flags.h
===================================================================
--- linux-2.6.25-rc5-mm1.orig/include/linux/page-flags.h 2008-03-26 19:21:50.259169581 -0700
+++ linux-2.6.25-rc5-mm1/include/linux/page-flags.h 2008-03-26 19:37:17.456669515 -0700
@@ -145,6 +145,10 @@ static inline int TestClearPage##uname(s
#define __PAGEFLAG(uname, lname) TESTPAGEFLAG(uname, lname) \
__SETPAGEFLAG(uname, lname) __CLEARPAGEFLAG(uname, lname)
+#define PAGEFLAG_FALSE(uname) \
+static inline int Page##uname(struct page *page) \
+ { return 0; }
+
#define TESTSCFLAG(uname, lname) \
TESTSETFLAG(uname, lname) TESTCLEARFLAG(uname, lname)
@@ -182,28 +186,19 @@ PAGEFLAG(Readahead, reclaim) /* Reminde
*/
#define PageHighMem(__p) is_highmem(page_zone(__p))
#else
-static inline int PageHighMem(struct page *page)
-{
- return 0;
-}
+PAGEFLAG_FALSE(HighMem)
#endif
#ifdef CONFIG_SWAP
PAGEFLAG(SwapCache, swapcache)
#else
-static inline int PageSwapCache(struct page *page)
-{
- return 0;
-}
+PAGEFLAG_FALSE(SwapCache)
#endif
#ifdef CONFIG_IA64_UNCACHED_ALLOCATOR
PAGEFLAG(Uncached, uncached)
#else
-static inline int PageUncached(struct page *)
-{
- return 0;
-}
+PAGEFLAG_FALSE(Uncached)
#endif
static inline int PageUptodate(struct page *page)