2 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index bad9486ee0cc..9011505e740d 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -344,6 +344,7 @@ struct zone {
 typedef enum {
         ZONE_ALL_UNRECLAIMABLE,         /* all pages pinned */
         ZONE_RECLAIM_LOCKED,            /* prevents concurrent reclaim */
+        ZONE_OOM_LOCKED,                /* zone is in OOM killer zonelist */
 } zone_flags_t;
 
 static inline void zone_set_flag(struct zone *zone, zone_flags_t flag)
@@ -363,6 +364,10 @@ static inline int zone_is_reclaim_locked(const struct zone *zone)
 {
         return test_bit(ZONE_RECLAIM_LOCKED, &zone->flags);
 }
+static inline int zone_is_oom_locked(const struct zone *zone)
+{
+        return test_bit(ZONE_OOM_LOCKED, &zone->flags);
+}
 
 /*
  * The "priority" of VM scanning is how much of the queues we will scan in one
diff --git a/include/linux/oom.h b/include/linux/oom.h
index cf6ebf5b422c..e9081200cdb7 100644
--- a/include/linux/oom.h
+++ b/include/linux/oom.h
@@ -20,6 +20,9 @@ enum oom_constraint {
         CONSTRAINT_MEMORY_POLICY,
 };
 
+extern int try_set_zone_oom(struct zonelist *zonelist);
+extern void clear_zonelist_oom(struct zonelist *zonelist);
+
 extern void out_of_memory(struct zonelist *zonelist, gfp_t gfp_mask, int order);
 extern int register_oom_notifier(struct notifier_block *nb);
 extern int unregister_oom_notifier(struct notifier_block *nb);