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net: Add netif_copy_real_num_queues() for use by virtual net drivers

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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>
This commit is contained in:
Ben Hutchings 2010-09-27 08:24:49 +00:00 committed by David S. Miller
parent 62fe0b40ab
commit 3171d02629
1 changed files with 12 additions and 0 deletions
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12
include/linux/netdevice.h
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@ -1699,6 +1699,18 @@ 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.