1 files changed, 7 insertions, 1 deletions

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 9ea629c02a4b..547aac7696cd 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -74,7 +74,9 @@
 #define PG_mappedtodisk         16      /* Has blocks allocated on-disk */
 #define PG_reclaim              17      /* To be reclaimed asap */
 #define PG_nosave_free          18      /* Free, should not be written */
-#define PG_uncached             19      /* Page has been mapped as uncached */
+#define PG_buddy                19      /* Page is free, on buddy lists */
+
+#define PG_uncached             20      /* Page has been mapped as uncached */
 
 /*
  * Global page accounting.  One instance per CPU.  Only unsigned longs are
@@ -317,6 +319,10 @@ extern void __mod_page_state_offset(unsigned long offset, unsigned long delta);
 #define SetPageNosaveFree(page) set_bit(PG_nosave_free, &(page)->flags)
 #define ClearPageNosaveFree(page)               clear_bit(PG_nosave_free, &(page)->flags)
 
+#define PageBuddy(page)         test_bit(PG_buddy, &(page)->flags)
+#define __SetPageBuddy(page)    __set_bit(PG_buddy, &(page)->flags)
+#define __ClearPageBuddy(page)  __clear_bit(PG_buddy, &(page)->flags)
+
 #define PageMappedToDisk(page)  test_bit(PG_mappedtodisk, &(page)->flags)
 #define SetPageMappedToDisk(page) set_bit(PG_mappedtodisk, &(page)->flags)
 #define ClearPageMappedToDisk(page) clear_bit(PG_mappedtodisk, &(page)->flags)