netdev: introduce dev_get_stats()

In order for the network device ops get_stats call to be immutable, the handling
of the default internal network device stats block has to be changed. Add a new
helper function which replaces the old use of internal_get_stats.

Note: change return code to make it clear that the caller should not
go changing the returned statistics.

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/s390/appldata/appldata_net_sum.c b/arch/s390/appldata/appldata_net_sum.c
index 3b746556e1a3..fa741f84c5b9 100644
--- a/arch/s390/appldata/appldata_net_sum.c
+++ b/arch/s390/appldata/appldata_net_sum.c
@@ -67,7 +67,6 @@ static void appldata_get_net_sum_data(void *data)
         int i;
         struct appldata_net_sum_data *net_data;
         struct net_device *dev;
-        struct net_device_stats *stats;
         unsigned long rx_packets, tx_packets, rx_bytes, tx_bytes, rx_errors,
                         tx_errors, rx_dropped, tx_dropped, collisions;
 
@@ -86,7 +85,8 @@ static void appldata_get_net_sum_data(void *data)
         collisions = 0;
         read_lock(&dev_base_lock);
         for_each_netdev(&init_net, dev) {
-                stats = dev->get_stats(dev);
+                const struct net_device_stats *stats = dev_get_stats(dev);
+
                 rx_packets += stats->rx_packets;
                 tx_packets += stats->tx_packets;
                 rx_bytes   += stats->rx_bytes;