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>

2 files changed, 2 insertions, 16 deletions

diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index e9a48baf8551..3a954067b6a4 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -1215,18 +1215,12 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct genl_info *info)
         if (err)
                 goto err_free_dp;
 
-        dp->stats_percpu = alloc_percpu(struct dp_stats_percpu);
+        dp->stats_percpu = netdev_alloc_pcpu_stats(struct dp_stats_percpu);
         if (!dp->stats_percpu) {
                 err = -ENOMEM;
                 goto err_destroy_table;
         }
 
-        for_each_possible_cpu(i) {
-                struct dp_stats_percpu *dpath_stats;
-                dpath_stats = per_cpu_ptr(dp->stats_percpu, i);
-                u64_stats_init(&dpath_stats->sync);
-        }
-
         dp->ports = kmalloc(DP_VPORT_HASH_BUCKETS * sizeof(struct hlist_head),
                             GFP_KERNEL);
         if (!dp->ports) {
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
index 208dd9a26dd1..3b4db3220456 100644
--- a/net/openvswitch/vport.c
+++ b/net/openvswitch/vport.c
@@ -121,7 +121,6 @@ struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops,
 {
         struct vport *vport;
         size_t alloc_size;
-        int i;
 
         alloc_size = sizeof(struct vport);
         if (priv_size) {
@@ -139,19 +138,12 @@ struct vport *ovs_vport_alloc(int priv_size, const struct vport_ops *ops,
         vport->ops = ops;
         INIT_HLIST_NODE(&vport->dp_hash_node);
 
-        vport->percpu_stats = alloc_percpu(struct pcpu_sw_netstats);
+        vport->percpu_stats = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
         if (!vport->percpu_stats) {
                 kfree(vport);
                 return ERR_PTR(-ENOMEM);
         }
 
-        for_each_possible_cpu(i) {
-                struct pcpu_sw_netstats *vport_stats;
-                vport_stats = per_cpu_ptr(vport->percpu_stats, i);
-                u64_stats_init(&vport_stats->syncp);
-        }
-
-
         spin_lock_init(&vport->stats_lock);
 
         return vport;