bonding: remove bond_prev_slave()

We don't really need it, and it's really hard to RCUify the list->prev.

CC: Jay Vosburgh <fubar@us.ibm.com>
CC: Andy Gospodarek <andy@greyhouse.net>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 06ffc8a..6aa345a 100644 (file)
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1255,7 +1255,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
 {
        struct bonding *bond = netdev_priv(bond_dev);
        const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
-       struct slave *new_slave = NULL;
+       struct slave *new_slave = NULL, *prev_slave;
        struct sockaddr addr;
        int link_reporting;
        int res = 0, i;
@@ -1472,6 +1472,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
 
        write_lock_bh(&bond->lock);
 
+       prev_slave = bond_last_slave(bond);
        bond_attach_slave(bond, new_slave);
 
        new_slave->delay = 0;
@@ -1566,9 +1567,6 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
                         */
                        bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL);
                } else {
-                       struct slave *prev_slave;
-
-                       prev_slave = bond_prev_slave(bond, new_slave);
                        SLAVE_AD_INFO(new_slave).id =
                                SLAVE_AD_INFO(prev_slave).id + 1;
                }
@@ -3506,9 +3504,8 @@ static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
         */
 
        bond_for_each_slave(bond, slave, iter) {
-               pr_debug("s %p s->p %p c_m %p\n",
+               pr_debug("s %p c_m %p\n",
                         slave,
-                        bond_prev_slave(bond, slave),
                         slave->dev->netdev_ops->ndo_change_mtu);
 
                res = dev_set_mtu(slave->dev, new_mtu);

diff --git a/drivers/net/bonding/bonding.h b/drivers/net/bonding/bonding.h
index 3eb464c..454d6af 100644 (file)
--- a/drivers/net/bonding/bonding.h
+++ b/drivers/net/bonding/bonding.h
@@ -96,10 +96,6 @@
        (bond_is_last_slave(bond, pos) ? bond_first_slave(bond) : \
                                         bond_to_slave((pos)->list.next))
 
-#define bond_prev_slave(bond, pos) \
-       (bond_is_first_slave(bond, pos) ? bond_last_slave(bond) : \
-                                         bond_to_slave((pos)->list.prev))
-
 /**
  * bond_for_each_slave - iterate over all slaves
  * @bond:      the bond holding this list