1 files changed, 20 insertions, 0 deletions
diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 73fae8c4a5fb..51a2c1179ee6 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -160,6 +160,26 @@ static inline unsigned long zone_page_state_snapshot(struct zone *zone,
 	return x;
 }
 
+static inline unsigned long global_page_state_snapshot(enum zone_stat_item item)
+{
+	long x = atomic_long_read(&vm_stat[item]);
+
+#ifdef CONFIG_SMP
+	struct zone *zone;
+	int cpu;
+
+	for_each_online_cpu(cpu) {
+		for_each_populated_zone(zone)
+			x += per_cpu_ptr(zone->pageset,
+				cpu)->vm_stat_diff[item];
+	}
+
+	if (x < 0)
+		x = 0;
+#endif
+	return x;
+}
+
 #ifdef CONFIG_NUMA
 
 extern unsigned long node_page_state(int node, enum zone_stat_item item);