netdev - [PATCH] net-sysfs: Slightly optimize 'xps_queue

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Message-Id: <498b1a0a7a0cba019c9d95693cd489827168b79e.1637517554.git.christophe.jaillet@wanadoo.fr>
Date:   Sun, 21 Nov 2021 19:01:03 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     davem@...emloft.net, kuba@...nel.org, atenart@...nel.org,
        alexanderduyck@...com, pabeni@...hat.com, weiwan@...gle.com,
        lucien.xin@...il.com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] net-sysfs: Slightly optimize 'xps_queue_show()'

The 'mask' bitmap is local to this function. So the non-atomic
'__set_bit()' can be used to save a few cycles.

Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 net/core/net-sysfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 9c01c642cf9e..3be3f4a6add3 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -1452,7 +1452,7 @@ static ssize_t xps_queue_show(struct net_device *dev, unsigned int index,
 
 		for (i = map->len; i--;) {
 			if (map->queues[i] == index) {
-				set_bit(j, mask);
+				__set_bit(j, mask);
 				break;
 			}
 		}
-- 
2.30.2