thp: compound_lock

[mv-sheeva.git] / include / linux / page-flags.h

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index 4805fdec8d6ebb85301d087dbc862443694cc195..5a743cc87238a7d31b009b2e7d2845f5a5703b54 100644 (file)
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -107,6 +107,9 @@ enum pageflags {
 #endif
 #ifdef CONFIG_MEMORY_FAILURE
        PG_hwpoison,            /* hardware poisoned page. Don't touch */
+#endif
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+       PG_compound_lock,
 #endif
        __NR_PAGEFLAGS,
 
@@ -397,6 +400,12 @@ static inline void __ClearPageTail(struct page *page)
 #define __PG_MLOCKED           0
 #endif
 
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+#define __PG_COMPOUND_LOCK             (1 << PG_compound_lock)
+#else
+#define __PG_COMPOUND_LOCK             0
+#endif
+
 /*
  * Flags checked when a page is freed.  Pages being freed should not have
  * these flags set.  It they are, there is a problem.
@@ -406,7 +415,8 @@ static inline void __ClearPageTail(struct page *page)
         1 << PG_private | 1 << PG_private_2 | \
         1 << PG_buddy   | 1 << PG_writeback | 1 << PG_reserved | \
         1 << PG_slab    | 1 << PG_swapcache | 1 << PG_active | \
-        1 << PG_unevictable | __PG_MLOCKED | __PG_HWPOISON)
+        1 << PG_unevictable | __PG_MLOCKED | __PG_HWPOISON | \
+        __PG_COMPOUND_LOCK)
 
 /*
  * Flags checked when a page is prepped for return by the page allocator.