From: xiaolinkui <xiaolinkui@kylinos.cn>
Date: Thu, 22 Aug 2019 14:58:16 +0800
Subject: net: use unlikely for dql_avail case
Patch-mainline: v5.4-rc1
Git-commit: f3acd33d840d3ea3e1233d234605c85cbbf26054
References: bsc#1154353
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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
include/linux/netdevice.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3272,7 +3272,7 @@ static inline void netdev_tx_completed_q
*/
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))