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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>
This commit is contained in:
xiaolinkui 2019-08-22 14:58:16 +08:00 committed by David S. Miller
parent d4ed7463d0
commit f3acd33d84
1 changed files with 1 additions and 1 deletions
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2
include/linux/netdevice.h
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@ -3272,7 +3272,7 @@ static inline void netdev_tx_completed_queue(struct netdev_queue *dev_queue,
*/
smp_mb();
if (dql_avail(&dev_queue->dql) < 0)
if (unlikely(dql_avail(&dev_queue->dql) < 0))
return;
if (test_and_clear_bit(__QUEUE_STATE_STACK_XOFF, &dev_queue->state))