| Message ID | 1392970135-11904-3-git-send-email-dingtianhong@huawei.com |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
diff --git a/drivers/net/bonding/bond_procfs.c b/drivers/net/bonding/bond_procfs.c index 434df73..588cf39 100644 --- a/drivers/net/bonding/bond_procfs.c +++ b/drivers/net/bonding/bond_procfs.c @@ -69,9 +69,7 @@ static void bond_info_show_master(struct seq_file *seq) struct slave *curr; int i; - read_lock(&bond->curr_slave_lock); - curr = bond->curr_active_slave; - read_unlock(&bond->curr_slave_lock); + curr = rcu_dereference(bond->curr_active_slave); seq_printf(seq, "Bonding Mode: %s", bond_mode_name(bond->params.mode));
The bond_info_show_master already in RCU read-side critical section, and the we access curr_active_slave without the curr_slave_lock, we could not sure whether the curr_active_slave will be changed during the processing, so use RCU to protected the pointer. Cc: Jay Vosburgh <fubar@us.ibm.com> Cc: Veaceslav Falico <vfalico@redhat.com> Cc: Andy Gospodarek <andy@greyhouse.net> Signed-off-by: Ding Tianhong <dingtianhong@huawei.com> --- drivers/net/bonding/bond_procfs.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)