batman-adv: Prefix hash non-static functions with batadv_

batman-adv can be compiled as part of the kernel instead of an module. In that
case the linker will see all non-static symbols of batman-adv and all other
non-static symbols of the kernel. This could lead to symbol collisions. A
prefix for the batman-adv symbols that defines their private namespace avoids
such a problem.

Reported-by: David Miller <davem@davemloft.net>
Signed-off-by: Sven Eckelmann <sven@narfation.org>
diff --git a/net/batman-adv/hash.h b/net/batman-adv/hash.h
index 3d67ce4..e75df6b 100644
--- a/net/batman-adv/hash.h
+++ b/net/batman-adv/hash.h
@@ -43,14 +43,14 @@
 };
 
 /* allocates and clears the hash */
-struct hashtable_t *hash_new(uint32_t size);
+struct hashtable_t *batadv_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);
+void batadv_hash_destroy(struct hashtable_t *hash);
 
 /* remove the hash structure. if hashdata_free_cb != NULL, this function will be
  * called to remove the elements inside of the hash.  if you don't remove the
@@ -77,7 +77,7 @@
 		spin_unlock_bh(list_lock);
 	}
 
-	hash_destroy(hash);
+	batadv_hash_destroy(hash);
 }
 
 /**