net: add dev_txq_stats_fold() helper

Some drivers ndo_get_stats() method need to perform txqueue stats folding.

Move folding from dev_get_stats() to a new dev_txq_stats_fold() function

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 7043f85e643d..c8fa4627de00 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1941,6 +1941,7 @@ extern void		netdev_features_change(struct net_device *dev);
 extern void             dev_load(struct net *net, const char *name);
 extern void             dev_mcast_init(void);
 extern const struct net_device_stats *dev_get_stats(struct net_device *dev);
+extern void             dev_txq_stats_fold(const struct net_device *dev, struct net_device_stats *stats);
 
 extern int              netdev_max_backlog;
 extern int              weight_p;