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net: remove search_list from netdev_adjacent

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We already don't need it cause we see every upper/lower device in the list
already.

CC: "David S. Miller" <davem@davemloft.net>
CC: Eric Dumazet <edumazet@google.com>
CC: Jiri Pirko <jiri@resnulli.us>
CC: Alexander Duyck <alexander.h.duyck@intel.com>
CC: Cong Wang <amwang@redhat.com>
Signed-off-by: Veaceslav Falico <vfalico@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Veaceslav Falico 2013-08-28 23:25:06 +02:00 committed by David S. Miller
parent 5d261913ca
commit 620f3186ca
1 changed files with 1 additions and 36 deletions
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37
net/core/dev.c
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@ -4381,42 +4381,8 @@ struct netdev_adjacent {
struct list_head list;
struct rcu_head rcu;
struct list_head search_list;
};
static void __append_search_uppers(struct list_head *search_list,
struct net_device *dev)
{
struct netdev_adjacent *upper;
list_for_each_entry(upper, &dev->upper_dev_list, list) {
/* check if this upper is not already in search list */
if (list_empty(&upper->search_list))
list_add_tail(&upper->search_list, search_list);
}
}
static bool __netdev_search_upper_dev(struct net_device *dev,
struct net_device *upper_dev)
{
LIST_HEAD(search_list);
struct netdev_adjacent *upper;
struct netdev_adjacent *tmp;
bool ret = false;
__append_search_uppers(&search_list, dev);
list_for_each_entry(upper, &search_list, search_list) {
if (upper->dev == upper_dev) {
ret = true;
break;
}
__append_search_uppers(&search_list, upper->dev);
}
list_for_each_entry_safe(upper, tmp, &search_list, search_list)
INIT_LIST_HEAD(&upper->search_list);
return ret;
}
static struct netdev_adjacent *__netdev_find_adj(struct net_device *dev,
struct net_device *adj_dev,
bool upper)
@ -4544,7 +4510,6 @@ static int __netdev_adjacent_dev_insert(struct net_device *dev,
adj->master = master;
adj->neighbour = neighbour;
adj->ref_nr = 1;
INIT_LIST_HEAD(&adj->search_list);
dev_hold(adj_dev);
pr_debug("dev_hold for %s, because of %s link added from %s to %s\n",
@ -4671,7 +4636,7 @@ static int __netdev_upper_dev_link(struct net_device *dev,
return -EBUSY;
/* To prevent loops, check if dev is not upper device to upper_dev. */
if (__netdev_search_upper_dev(upper_dev, dev))
if (__netdev_find_upper(upper_dev, dev))
return -EBUSY;
if (__netdev_find_upper(dev, upper_dev))