batman-adv: Initialize lockdep class keys for hashes

The hash for claim and backbone hash in the bridge loop avoidance code receive
the same key because they are getting initialized by hash_new with the same
key. Lockdep will create a backtrace when they are used recursively. This can
be avoided by reinitializing the key directly after the hash_new.

Signed-off-by: Sven Eckelmann <sven@narfation.org>

net/batman-adv/hash.h

@@ -45,6 +45,10 @@ struct hashtable_t {
 /* allocates and clears the hash */
 struct hashtable_t *hash_new(uint32_t size);
 
+/* set class key for all locks */
+void batadv_hash_set_lock_class(struct hashtable_t *hash,
+				struct lock_class_key *key);
+
 /* free only the hashtable and the hash itself. */
 void hash_destroy(struct hashtable_t *hash);