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>

1 files changed, 1 insertions, 8 deletions

diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index e7c1d5f8ab51..771c9bfa7d31 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -136,16 +136,9 @@ static const struct ethtool_ops loopback_ethtool_ops = {
 
 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;
 }