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net: use unlikely for dql_avail case
This is an unlikely case, use unlikely() on it seems logical. Signed-off-by: xiaolinkui <xiaolinkui@kylinos.cn> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -3272,7 +3272,7 @@ static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
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*/
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smp_mb();
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if (dql_avail(&dev_queue->dql) < 0)
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if (unlikely(dql_avail(&dev_queue->dql) < 0))
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return;
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if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))
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