net: Add netif_copy_real_num_queues() for use by virtual net drivers
This sets the active numbers of queues on a net device to match another.
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index b15732e..c2bec99 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1699,6 +1699,18 @@
}
#endif
+static inline int netif_copy_real_num_queues(struct net_device *to_dev,
+ const struct net_device *from_dev)
+{
+ netif_set_real_num_tx_queues(to_dev, from_dev->real_num_tx_queues);
+#ifdef CONFIG_RPS
+ return netif_set_real_num_rx_queues(to_dev,
+ from_dev->real_num_rx_queues);
+#else
+ return 0;
+#endif
+}
+
/* Use this variant when it is known for sure that it
* is executing from hardware interrupt context or with hardware interrupts
* disabled.