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path: root/drivers/net/loopback.c
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Diffstat (limited to 'drivers/net/loopback.c')
-rw-r--r--drivers/net/loopback.c32
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. */