diff --git a/net/batman-adv/hash.c b/net/batman-adv/hash.c
index 7b49e4001778f0a53d14eb76ee96595a9a02e775..9194f4d891b1263c48f7442824c55095b56576c0 100644
--- a/net/batman-adv/hash.c
+++ b/net/batman-adv/hash.c
@@ -32,6 +32,8 @@ static void batadv_hash_init(struct batadv_hashtable *hash)
 		INIT_HLIST_HEAD(&hash->table[i]);
 		spin_lock_init(&hash->list_locks[i]);
 	}
+
+	atomic_set(&hash->generation, 0);
 }
 
 /**
diff --git a/net/batman-adv/hash.h b/net/batman-adv/hash.h
index 9490a7ca2ba698399b2247799dd85004da5d04c8..0e36fa1c7c3eccdd33f8ede8ddac0780c3f8039e 100644
--- a/net/batman-adv/hash.h
+++ b/net/batman-adv/hash.h
@@ -21,6 +21,7 @@
 
 #include "main.h"
 
+#include <linux/atomic.h>
 #include <linux/compiler.h>
 #include <linux/list.h>
 #include <linux/rculist.h>
@@ -58,6 +59,9 @@ struct batadv_hashtable {
 
 	/** @size: size of hashtable */
 	u32 size;
+
+	/** @generation: current (generation) sequence number */
+	atomic_t generation;
 };
 
 /* allocates and clears the hash */
@@ -112,6 +116,7 @@ static inline int batadv_hash_add(struct batadv_hashtable *hash,
 
 	/* no duplicate found in list, add new element */
 	hlist_add_head_rcu(data_node, head);
+	atomic_inc(&hash->generation);
 
 	ret = 0;
 
@@ -154,6 +159,7 @@ static inline void *batadv_hash_remove(struct batadv_hashtable *hash,
 
 		data_save = node;
 		hlist_del_rcu(node);
+		atomic_inc(&hash->generation);
 		break;
 	}
 	spin_unlock_bh(&hash->list_locks[index]);