X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=include%2Flinux%2Fpage-flags.h;h=a1e143634946f08128737148f53358550b356ec8;hb=d85f33855c303acfa87fa457157cef755b6087df;hp=4830a3bedfb240480e1ade7c58d030b0ab12e978;hpb=f0eef25339f92f7cd4aeea23d9ae97987a5a1e82;p=powerpc.git

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 4830a3bedf..a1e1436349 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -76,7 +76,7 @@
 #define PG_active		 6
 #define PG_slab			 7	/* slab debug (Suparna wants this) */
 
-#define PG_checked		 8	/* kill me in 2.5.<early>. */
+#define PG_owner_priv_1		 8	/* Owner use. If pagecache, fs may use*/
 #define PG_arch_1		 9
 #define PG_reserved		10
 #define PG_private		11	/* If pagecache, has fs-private data */
@@ -91,6 +91,14 @@
 #define PG_nosave_free		18	/* Used for system suspend/resume */
 #define PG_buddy		19	/* Page is free, on buddy lists */
 
+/* PG_owner_priv_1 users should have descriptive aliases */
+#define PG_checked		PG_owner_priv_1 /* Used by some filesystems */
+
+/*
+ * Marks tail portion of a compound page. We currently do not reclaim
+ * compound pages so we can reuse a flag only used for reclaim here.
+ */
+#define PG_tail			PG_reclaim
 
 #if (BITS_PER_LONG > 32)
 /*
@@ -131,7 +139,7 @@
 static inline void SetPageUptodate(struct page *page)
 {
 	if (!test_and_set_bit(PG_uptodate, &page->flags))
-		page_test_and_clear_dirty(page);
+		page_clear_dirty(page);
 }
 #else
 #define SetPageUptodate(page)	set_bit(PG_uptodate, &(page)->flags)
@@ -239,6 +247,14 @@ static inline void SetPageUptodate(struct page *page)
 #define __SetPageCompound(page)	__set_bit(PG_compound, &(page)->flags)
 #define __ClearPageCompound(page) __clear_bit(PG_compound, &(page)->flags)
 
+/*
+ * Note: PG_tail is an alias of another page flag. The result of PageTail()
+ * is only valid if PageCompound(page) is true.
+ */
+#define PageTail(page)	test_bit(PG_tail, &(page)->flags)
+#define __SetPageTail(page)	__set_bit(PG_tail, &(page)->flags)
+#define __ClearPageTail(page)	__clear_bit(PG_tail, &(page)->flags)
+
 #ifdef CONFIG_SWAP
 #define PageSwapCache(page)	test_bit(PG_swapcache, &(page)->flags)
 #define SetPageSwapCache(page)	set_bit(PG_swapcache, &(page)->flags)
@@ -253,15 +269,11 @@ static inline void SetPageUptodate(struct page *page)
 
 struct page;	/* forward declaration */
 
-int test_clear_page_dirty(struct page *page);
+extern void cancel_dirty_page(struct page *page, unsigned int account_size);
+
 int test_clear_page_writeback(struct page *page);
 int test_set_page_writeback(struct page *page);
 
-static inline void clear_page_dirty(struct page *page)
-{
-	test_clear_page_dirty(page);
-}
-
 static inline void set_page_writeback(struct page *page)
 {
 	test_set_page_writeback(page);