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[net-next-2.6,02/17] net: Add netif_copy_real_num_queues() for use by virtual net drivers

Message ID 1285611889.2263.292.camel@achroite.uk.solarflarecom.com
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

Ben Hutchings Sept. 27, 2010, 6:24 p.m. UTC 
This sets the active numbers of queues on a net device to match another.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
---
 include/linux/netdevice.h |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
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Patch

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index cf3d5a3..7fd39b3 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1698,6 +1698,18 @@  static inline int netif_set_real_num_rx_queues(struct net_device *dev,
 }
 #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.