[PATCH] Rename PG_checked to PG_owner_priv_1

Rename PG_checked to PG_owner_priv_1 to reflect its availablilty as a
private flag for use by the owner/allocator of the page.  In the case of
pagecache pages (which might be considered to be owned by the mm),
filesystems may use the flag.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Nick Piggin <nickpiggin@yahoo.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 350878a..9cd0d0e 100644 (file)
--- 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 +91,8 @@
 #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 */
 
 #if (BITS_PER_LONG > 32)
 /*

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 4173739..353ce90 100644 (file)
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -600,7 +600,7 @@ static int prep_new_page(struct page *page, int order, gfp_t gfp_flags)
 
        page->flags &= ~(1 << PG_uptodate | 1 << PG_error |
                        1 << PG_referenced | 1 << PG_arch_1 |
-                       1 << PG_checked | 1 << PG_mappedtodisk);
+                       1 << PG_owner_priv_1 | 1 << PG_mappedtodisk);
        set_page_private(page, 0);
        set_page_refcounted(page);