mlock: mlocked pages are unevictable

[linux-2.6-omap-h63xx.git] / include / linux / page-flags.h

diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index ec1a1baad348fe0ff00eafeecdffb2cacb35e706..b12f93a3c345f781b3edd26716f193efb1fdf0d4 100644 (file)
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -96,6 +96,7 @@ enum pageflags {
        PG_swapbacked,          /* Page is backed by RAM/swap */
 #ifdef CONFIG_UNEVICTABLE_LRU
        PG_unevictable,         /* Page is "unevictable"  */
+       PG_mlocked,             /* Page is vma mlocked */
 #endif
 #ifdef CONFIG_IA64_UNCACHED_ALLOCATOR
        PG_uncached,            /* Page has been mapped as uncached */
@@ -232,7 +233,17 @@ PAGEFLAG_FALSE(SwapCache)
 #ifdef CONFIG_UNEVICTABLE_LRU
 PAGEFLAG(Unevictable, unevictable) __CLEARPAGEFLAG(Unevictable, unevictable)
        TESTCLEARFLAG(Unevictable, unevictable)
+
+#define MLOCK_PAGES 1
+PAGEFLAG(Mlocked, mlocked) __CLEARPAGEFLAG(Mlocked, mlocked)
+       TESTSCFLAG(Mlocked, mlocked)
+
 #else
+
+#define MLOCK_PAGES 0
+PAGEFLAG_FALSE(Mlocked)
+       SETPAGEFLAG_NOOP(Mlocked) TESTCLEARFLAG_FALSE(Mlocked)
+
 PAGEFLAG_FALSE(Unevictable) TESTCLEARFLAG_FALSE(Unevictable)
        SETPAGEFLAG_NOOP(Unevictable) CLEARPAGEFLAG_NOOP(Unevictable)
        __CLEARPAGEFLAG_NOOP(Unevictable)
@@ -354,15 +365,17 @@ static inline void __ClearPageTail(struct page *page)
 #endif /* !PAGEFLAGS_EXTENDED */
 
 #ifdef CONFIG_UNEVICTABLE_LRU
-#define __PG_UNEVICTABLE (1 << PG_unevictable)
+#define __PG_UNEVICTABLE       (1 << PG_unevictable)
+#define __PG_MLOCKED           (1 << PG_mlocked)
 #else
-#define __PG_UNEVICTABLE 0
+#define __PG_UNEVICTABLE       0
+#define __PG_MLOCKED           0
 #endif
 
 #define PAGE_FLAGS     (1 << PG_lru   | 1 << PG_private   | 1 << PG_locked | \
                         1 << PG_buddy | 1 << PG_writeback | \
                         1 << PG_slab  | 1 << PG_swapcache | 1 << PG_active | \
-                        __PG_UNEVICTABLE)
+                        __PG_UNEVICTABLE | __PG_MLOCKED)
 
 /*
  * Flags checked in bad_page().  Pages on the free list should not have