[Xen-devel] [patch 24/44] xen: add pinned page flag

[Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>]

Add a new definition for PG_owner_priv_1 to define PG_pinned on Xen
pagetable pages.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>
Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>

---
 include/linux/page-flags.h |    5 +++++
 1 file changed, 5 insertions(+)

===================================================================
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -93,6 +93,7 @@
 
 /* PG_owner_priv_1 users should have descriptive aliases */
 #define PG_checked             PG_owner_priv_1 /* Used by some filesystems */
+#define PG_pinned              PG_owner_priv_1 /* Xen pinned pagetable */
 
 #if (BITS_PER_LONG > 32)
 /*
@@ -170,6 +171,10 @@ static inline void SetPageUptodate(struc
 #define PageChecked(page)      test_bit(PG_checked, &(page)->flags)
 #define SetPageChecked(page)   set_bit(PG_checked, &(page)->flags)
 #define ClearPageChecked(page) clear_bit(PG_checked, &(page)->flags)
+
+#define PagePinned(page)       test_bit(PG_pinned, &(page)->flags)
+#define SetPagePinned(page)    set_bit(PG_pinned, &(page)->flags)
+#define ClearPagePinned(page)  clear_bit(PG_pinned, &(page)->flags)
 
 #define PageReserved(page)     test_bit(PG_reserved, &(page)->flags)
 #define SetPageReserved(page)  set_bit(PG_reserved, &(page)->flags)

-- 


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