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net: dummy: use standard dev_lstats_add() and dev_lstats_read() 

This driver can simply use the common infrastructure instead
of duplicating it.

This cleanup will ease u64_stats_t adoption in a single location.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2019-11-07 16:27:19 -08:00 committed by David S. Miller
parent 4f77eb0941
commit 4a43b1f96b
1 changed files with 5 additions and 31 deletions
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36
drivers/net/dummy.c
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@ -51,41 +51,15 @@ static void set_multicast_list(struct net_device *dev)
{
}
struct pcpu_dstats {
u64 tx_packets;
u64 tx_bytes;
struct u64_stats_sync syncp;
};
static void dummy_get_stats64(struct net_device *dev,
struct rtnl_link_stats64 *stats)
{
int i;
for_each_possible_cpu(i) {
const struct pcpu_dstats *dstats;
u64 tbytes, tpackets;
unsigned int start;
dstats = per_cpu_ptr(dev->dstats, i);
do {
start = u64_stats_fetch_begin_irq(&dstats->syncp);
tbytes = dstats->tx_bytes;
tpackets = dstats->tx_packets;
} while (u64_stats_fetch_retry_irq(&dstats->syncp, start));
stats->tx_bytes += tbytes;
stats->tx_packets += tpackets;
}
dev_lstats_read(dev, &stats->tx_packets, &stats->tx_bytes);
}
static netdev_tx_t dummy_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct pcpu_dstats *dstats = this_cpu_ptr(dev->dstats);
u64_stats_update_begin(&dstats->syncp);
dstats->tx_packets++;
dstats->tx_bytes += skb->len;
u64_stats_update_end(&dstats->syncp);
dev_lstats_add(dev, skb->len);
skb_tx_timestamp(skb);
dev_kfree_skb(skb);
@ -94,8 +68,8 @@ static netdev_tx_t dummy_xmit(struct sk_buff *skb, struct net_device *dev)
static int dummy_dev_init(struct net_device *dev)
{
dev->dstats = netdev_alloc_pcpu_stats(struct pcpu_dstats);
if (!dev->dstats)
dev->lstats = netdev_alloc_pcpu_stats(struct pcpu_lstats);
if (!dev->lstats)
return -ENOMEM;
return 0;
@ -103,7 +77,7 @@ static int dummy_dev_init(struct net_device *dev)
static void dummy_dev_uninit(struct net_device *dev)
{
free_percpu(dev->dstats);
free_percpu(dev->lstats);
}
static int dummy_change_carrier(struct net_device *dev, bool new_carrier)