Staging: batman-adv: Remove unneeded rcu_read_lock

Regions which do not use rcu functions don't need to protected by
rcu_read_lock. If we want to protect data from being freed than it must
be covered by the same read-side critical section or otherwise the grace
period may already ended and freed the memory before we called
rcu_read_lock again.

Signed-off-by: Sven Eckelmann <sven.eckelmann@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/batman-adv/originator.c

@@ -329,15 +329,13 @@ int orig_seq_print_text(struct seq_file *seq, void *offset)
 				  net_dev->name);
 	}
 
-	rcu_read_lock();
 	seq_printf(seq, "[B.A.T.M.A.N. adv %s%s, MainIF/MAC: %s/%s (%s)]\n",
 		   SOURCE_VERSION, REVISION_VERSION_STR,
 		   bat_priv->primary_if->net_dev->name,
 		   bat_priv->primary_if->addr_str, net_dev->name);
 	seq_printf(seq, "  %-15s %s (%s/%i) %17s [%10s]: %20s ...\n",
 		   "Originator", "last-seen", "#", TQ_MAX_VALUE, "Nexthop",
 		   "outgoingIF", "Potential nexthops");
-	rcu_read_unlock();
 
 	spin_lock_irqsave(&bat_priv->orig_hash_lock, flags);