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, 1 insertions, 2 deletions

diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 146dcfeb060e..afd42d717320 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -270,7 +270,6 @@ static ssize_t netstat_show(const struct device *d,
                             unsigned long offset)
 {
         struct net_device *dev = to_net_dev(d);
-        struct net_device_stats *stats;
         ssize_t ret = -EINVAL;
 
         WARN_ON(offset > sizeof(struct net_device_stats) ||
@@ -278,7 +277,7 @@ static ssize_t netstat_show(const struct device *d,
 
         read_lock(&dev_base_lock);
         if (dev_isalive(dev)) {
-                stats = dev->get_stats(dev);
+                const struct net_device_stats *stats = dev_get_stats(dev);
                 ret = sprintf(buf, fmt_ulong,
                               *(unsigned long *)(((u8 *) stats) + offset));
         }