diff options
| -rw-r--r-- | drivers/net/loopback.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c index 4b6f7b2abea5..f3018bb7570d 100644 --- a/drivers/net/loopback.c +++ b/drivers/net/loopback.c @@ -62,7 +62,6 @@ struct pcpu_lstats { unsigned long packets; unsigned long bytes; }; -static DEFINE_PER_CPU(struct pcpu_lstats, pcpu_lstats); #define LOOPBACK_OVERHEAD (128 + MAX_HEADER + 16 + 16) @@ -134,7 +133,7 @@ static void emulate_large_send_offload(struct sk_buff *skb) */ static int loopback_xmit(struct sk_buff *skb, struct net_device *dev) { - struct pcpu_lstats *lb_stats; + struct pcpu_lstats *pcpu_lstats, *lb_stats; skb_orphan(skb); @@ -155,7 +154,8 @@ static int loopback_xmit(struct sk_buff *skb, struct net_device *dev) dev->last_rx = jiffies; /* it's OK to use __get_cpu_var() because BHs are off */ - lb_stats = &__get_cpu_var(pcpu_lstats); + pcpu_lstats = netdev_priv(dev); + lb_stats = per_cpu_ptr(pcpu_lstats, smp_processor_id()); lb_stats->bytes += skb->len; lb_stats->packets++; @@ -166,15 +166,17 @@ static int loopback_xmit(struct sk_buff *skb, struct net_device *dev) static struct net_device_stats *get_stats(struct net_device *dev) { + const struct pcpu_lstats *pcpu_lstats; struct net_device_stats *stats = &dev->stats; unsigned long bytes = 0; unsigned long packets = 0; int i; + pcpu_lstats = netdev_priv(dev); for_each_possible_cpu(i) { const struct pcpu_lstats *lb_stats; - lb_stats = &per_cpu(pcpu_lstats, i); + lb_stats = per_cpu_ptr(pcpu_lstats, i); bytes += lb_stats->bytes; packets += lb_stats->packets; } @@ -198,6 +200,26 @@ static const struct ethtool_ops loopback_ethtool_ops = { .get_rx_csum = always_on, }; +static int loopback_dev_init(struct net_device *dev) +{ + struct pcpu_lstats *lstats; + + lstats = alloc_percpu(struct pcpu_lstats); + if (!lstats) + return -ENOMEM; + + dev->priv = lstats; + return 0; +} + +static void loopback_dev_free(struct net_device *dev) +{ + struct pcpu_lstats *lstats = netdev_priv(dev); + + free_percpu(lstats); + free_netdev(dev); +} + /* * The loopback device is special. There is only one instance and * it is statically allocated. Don't do this for other devices. @@ -225,6 +247,8 @@ static void loopback_setup(struct net_device *dev) | NETIF_F_LLTX | NETIF_F_NETNS_LOCAL, dev->ethtool_ops = &loopback_ethtool_ops; + dev->init = loopback_dev_init; + dev->destructor = loopback_dev_free; } /* Setup and register the loopback device. */ |