AcoSail/kernel_optimize_test
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qeth: ensure that __vlan_find_dev_deep() is called with rcu_read_lock

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Also benefit from rcu_read_lock held and use __in_dev_get_rcu() in ipv4 case.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2013-01-03 22:48:58 +00:00 committed by David S. Miller
parent 43c00a75d2
commit 0347af510c
1 changed files with 11 additions and 10 deletions
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21
drivers/s390/net/qeth_l3_main.c
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@ -1640,6 +1640,7 @@ static void qeth_l3_add_mc(struct qeth_card *card, struct in_device *in4_dev)
}
}
/* called with rcu_read_lock */
static void qeth_l3_add_vlan_mc(struct qeth_card *card)
{
struct in_device *in_dev;
@ -1652,19 +1653,14 @@ static void qeth_l3_add_vlan_mc(struct qeth_card *card)
for_each_set_bit(vid, card->active_vlans, VLAN_N_VID) {
struct net_device *netdev;
rcu_read_lock();
netdev = __vlan_find_dev_deep(card->dev, vid);
rcu_read_unlock();
if (netdev == NULL ||
!(netdev->flags & IFF_UP))
continue;
in_dev = in_dev_get(netdev);
in_dev = __in_dev_get_rcu(netdev);
if (!in_dev)
continue;
rcu_read_lock();
qeth_l3_add_mc(card, in_dev);
rcu_read_unlock();
in_dev_put(in_dev);
}
}
@ -1673,14 +1669,14 @@ static void qeth_l3_add_multicast_ipv4(struct qeth_card *card)
struct in_device *in4_dev;
QETH_CARD_TEXT(card, 4, "chkmcv4");
in4_dev = in_dev_get(card->dev);
if (in4_dev == NULL)
return;
rcu_read_lock();
in4_dev = __in_dev_get_rcu(card->dev);
if (in4_dev == NULL)
goto unlock;
qeth_l3_add_mc(card, in4_dev);
qeth_l3_add_vlan_mc(card);
unlock:
rcu_read_unlock();
in_dev_put(in4_dev);
}
#ifdef CONFIG_QETH_IPV6
@ -1705,6 +1701,7 @@ static void qeth_l3_add_mc6(struct qeth_card *card, struct inet6_dev *in6_dev)
}
}
/* called with rcu_read_lock */
static void qeth_l3_add_vlan_mc6(struct qeth_card *card)
{
struct inet6_dev *in_dev;
@ -1741,10 +1738,12 @@ static void qeth_l3_add_multicast_ipv6(struct qeth_card *card)
in6_dev = in6_dev_get(card->dev);
if (in6_dev == NULL)
return;
rcu_read_lock();
read_lock_bh(&in6_dev->lock);
qeth_l3_add_mc6(card, in6_dev);
qeth_l3_add_vlan_mc6(card);
read_unlock_bh(&in6_dev->lock);
rcu_read_unlock();
in6_dev_put(in6_dev);
}
#endif /* CONFIG_QETH_IPV6 */
@ -1813,8 +1812,10 @@ static void qeth_l3_free_vlan_addresses6(struct qeth_card *card,
static void qeth_l3_free_vlan_addresses(struct qeth_card *card,
unsigned short vid)
{
rcu_read_lock();
qeth_l3_free_vlan_addresses4(card, vid);
qeth_l3_free_vlan_addresses6(card, vid);
rcu_read_unlock();
}
static int qeth_l3_vlan_rx_add_vid(struct net_device *dev, unsigned short vid)