Commit eef6dd65 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

gre: Optimize multiple unregistration



Speedup module unloading by factorizing synchronize_rcu() calls
Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0694c4c0
......@@ -1290,16 +1290,19 @@ static const struct net_protocol ipgre_protocol = {
.netns_ok = 1,
};
static void ipgre_destroy_tunnels(struct ipgre_net *ign)
static void ipgre_destroy_tunnels(struct ipgre_net *ign, struct list_head *head)
{
int prio;
for (prio = 0; prio < 4; prio++) {
int h;
for (h = 0; h < HASH_SIZE; h++) {
struct ip_tunnel *t;
while ((t = ign->tunnels[prio][h]) != NULL)
unregister_netdevice(t->dev);
struct ip_tunnel *t = ign->tunnels[prio][h];
while (t != NULL) {
unregister_netdevice_queue(t->dev, head);
t = t->next;
}
}
}
}
......@@ -1347,10 +1350,12 @@ static int ipgre_init_net(struct net *net)
static void ipgre_exit_net(struct net *net)
{
struct ipgre_net *ign;
LIST_HEAD(list);
ign = net_generic(net, ipgre_net_id);
rtnl_lock();
ipgre_destroy_tunnels(ign);
ipgre_destroy_tunnels(ign, &list);
unregister_netdevice_many(&list);
rtnl_unlock();
kfree(ign);
}
......
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