net: introduce netdev_alloc_pcpu_stats() for drivers
There are many drivers calling alloc_percpu() to allocate pcpu stats
and then initializing ->syncp. So just introduce a helper function for them.
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index e7c1d5f..771c9bf 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -136,16 +136,9 @@
static int loopback_dev_init(struct net_device *dev)
{
- int i;
- dev->lstats = alloc_percpu(struct pcpu_lstats);
+ dev->lstats = netdev_alloc_pcpu_stats(struct pcpu_lstats);
if (!dev->lstats)
return -ENOMEM;
-
- for_each_possible_cpu(i) {
- struct pcpu_lstats *lb_stats;
- lb_stats = per_cpu_ptr(dev->lstats, i);
- u64_stats_init(&lb_stats->syncp);
- }
return 0;
}