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, 2 insertions, 8 deletions

diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
index 50228be5c17b..3400d737adc6 100644
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -1041,19 +1041,13 @@ int ip_tunnel_init(struct net_device *dev)
 {
         struct ip_tunnel *tunnel = netdev_priv(dev);
         struct iphdr *iph = &tunnel->parms.iph;
-        int i, err;
+        int err;
 
         dev->destructor = ip_tunnel_dev_free;
-        dev->tstats = alloc_percpu(struct pcpu_sw_netstats);
+        dev->tstats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
         if (!dev->tstats)
                 return -ENOMEM;
 
-        for_each_possible_cpu(i) {
-                struct pcpu_sw_netstats *ipt_stats;
-                ipt_stats = per_cpu_ptr(dev->tstats, i);
-                u64_stats_init(&ipt_stats->syncp);
-        }
-
         tunnel->dst_cache = alloc_percpu(struct ip_tunnel_dst);
         if (!tunnel->dst_cache) {
                 free_percpu(dev->tstats);