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 <[email protected]> --- drivers/staging/batman-adv/originator.c | 2 -- 1 files changed, 0 insertions(+), 2 deletions(-) diff --git a/drivers/staging/batman-adv/originator.c b/drivers/staging/batman-adv/originator.c index f25d7fd..c530df1 100644 --- 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); -- 1.7.2.3
