[PATCH] net: use unlikely for dql_avail case
From: xiaolinkui <hidden>
Date: 2019-08-22 06:59:12
Also in:
bpf
Subsystem:
networking drivers, networking [general], the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
This is an unlikely case, use unlikely() on it seems logical. Signed-off-by: xiaolinkui <redacted> --- include/linux/netdevice.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 88292953aa6f..005f3da1b13d 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h@@ -3270,7 +3270,7 @@ 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))
--
2.17.1