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net: add netif_tx_queue_frozen_or_stopped

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When testing struct netdev_queue state against FROZEN bit, we also test
XOFF bit. We can test both bits at once and save some cycles.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2010-11-23 10:42:02 +00:00
committed by David S. Miller
parent d3c15cab21
commit 5a0d2268d2
5 changed files with 10 additions and 12 deletions
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6
include/linux/netdevice.h
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@@ -493,6 +493,8 @@ static inline void napi_synchronize(const struct napi_struct *n)
enum netdev_queue_state_t {
__QUEUE_STATE_XOFF,
__QUEUE_STATE_FROZEN,
#define QUEUE_STATE_XOFF_OR_FROZEN ((1 << __QUEUE_STATE_XOFF) | \
(1 << __QUEUE_STATE_FROZEN))
};
struct netdev_queue {
@@ -1629,9 +1631,9 @@ static inline int netif_queue_stopped(const struct net_device *dev)
return netif_tx_queue_stopped(netdev_get_tx_queue(dev, 0));
}
static inline int netif_tx_queue_frozen(const struct netdev_queue *dev_queue)
static inline int netif_tx_queue_frozen_or_stopped(const struct netdev_queue *dev_queue)
{
return test_bit(__QUEUE_STATE_FROZEN, &dev_queue->state);
return dev_queue->state & QUEUE_STATE_XOFF_OR_FROZEN;
}
/**