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/macvlan.c b/drivers/net/macvlan.c
index 8433de4509c7..25685e3eb472 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -534,7 +534,6 @@ static int macvlan_init(struct net_device *dev)
 {
         struct macvlan_dev *vlan = netdev_priv(dev);
         const struct net_device *lowerdev = vlan->lowerdev;
-        int i;
 
         dev->state              = (dev->state & ~MACVLAN_STATE_MASK) |
                                   (lowerdev->state & MACVLAN_STATE_MASK);
@@ -546,16 +545,10 @@ static int macvlan_init(struct net_device *dev)
 
         macvlan_set_lockdep_class(dev);
 
-        vlan->pcpu_stats = alloc_percpu(struct vlan_pcpu_stats);
+        vlan->pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats);
         if (!vlan->pcpu_stats)
                 return -ENOMEM;
 
-        for_each_possible_cpu(i) {
-                struct vlan_pcpu_stats *mvlstats;
-                mvlstats = per_cpu_ptr(vlan->pcpu_stats, i);
-                u64_stats_init(&mvlstats->syncp);
-        }
-
         return 0;
 }