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>

diff --git a/drivers/staging/batman-adv/originator.c b/drivers/staging/batman-adv/originator.c
index f25d7fd..c530df1 100644 (file)
--- a/drivers/staging/batman-adv/originator.c
+++ b/drivers/staging/batman-adv/originator.c
@@ -329,7 +329,6 @@ 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,
@@ -337,7 +336,6 @@ int orig_seq_print_text(struct seq_file *seq, void *offset)
        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);