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Message-ID: <1392970135-11904-3-git-send-email-dingtianhong@huawei.com> Date: Fri, 21 Feb 2014 16:08:53 +0800 From: Ding Tianhong <dingtianhong@...wei.com> To: <fubar@...ibm.com>, <vfalico@...hat.com>, <andy@...yhouse.net> CC: <davem@...emloft.net>, <netdev@...r.kernel.org> Subject: [PATCH net-next 2/4] bonding: use rcu_dereference() to access curr_active_slave 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@...ibm.com> Cc: Veaceslav Falico <vfalico@...hat.com> Cc: Andy Gospodarek <andy@...yhouse.net> Signed-off-by: Ding Tianhong <dingtianhong@...wei.com> --- drivers/net/bonding/bond_procfs.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) 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)); -- 1.8.0 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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