[PATCH] Use ZVC for inactive and active counts

[deliverable/linux.git] / include / linux / vmstat.h

diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index c89df55f6e035df2ef064726c870911506c7debc..c8d55bcc09b91e9ccc049d8ea76ad7bbd26b3bb6 100644 (file)
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -10,8 +10,9 @@
 /*
  * Light weight per cpu counter implementation.
  *
- * Counters should only be incremented and no critical kernel component
- * should rely on the counter values.
+ * Counters should only be incremented.  You need to set EMBEDDED
+ * to disable VM_EVENT_COUNTERS.  Things like procps (vmstat,
+ * top, etc) use /proc/vmstat and depend on these counters.
  *
  * Counters are handled completely inline. On many platforms the code
  * generated will simply be the increment of a global address.
@@ -73,7 +74,13 @@ static inline void count_vm_events(enum vm_event_item item, long delta)
 }
 
 extern void all_vm_events(unsigned long *);
+#ifdef CONFIG_HOTPLUG
 extern void vm_events_fold_cpu(int cpu);
+#else
+static inline void vm_events_fold_cpu(int cpu)
+{
+}
+#endif
 
 #else
 
@@ -179,6 +186,9 @@ void inc_zone_page_state(struct page *, enum zone_stat_item);
 void dec_zone_page_state(struct page *, enum zone_stat_item);
 
 extern void inc_zone_state(struct zone *, enum zone_stat_item);
+extern void __inc_zone_state(struct zone *, enum zone_stat_item);
+extern void dec_zone_state(struct zone *, enum zone_stat_item);
+extern void __dec_zone_state(struct zone *, enum zone_stat_item);
 
 void refresh_cpu_vm_stats(int);
 void refresh_vm_stats(void);
@@ -207,6 +217,12 @@ static inline void __inc_zone_page_state(struct page *page,
        __inc_zone_state(page_zone(page), item);
 }
 
+static inline void __dec_zone_state(struct zone *zone, enum zone_stat_item item)
+{
+       atomic_long_dec(&zone->vm_stat[item]);
+       atomic_long_dec(&vm_stat[item]);
+}
+
 static inline void __dec_zone_page_state(struct page *page,
                        enum zone_stat_item item)
 {