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Message-ID: <20240207142629.3456570-4-edumazet@google.com>
Date: Wed, 7 Feb 2024 14:26:19 +0000
From: Eric Dumazet <edumazet@...gle.com>
To: "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, eric.dumazet@...il.com,
Eric Dumazet <edumazet@...gle.com>
Subject: [PATCH net-next 03/13] dev: annotate accesses to dev->link
Following patch will read dev->link locklessly,
annotate the write from do_setlink().
Signed-off-by: Eric Dumazet <edumazet@...gle.com>
---
net/core/rtnetlink.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 31f433950c8dc953bcb65cc0469f7df962314b87..8d95e0863534f80cecceb2dd4a7b2a16f7f4bca3 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -2974,7 +2974,7 @@ static int do_setlink(const struct sk_buff *skb,
write_lock(&dev_base_lock);
if (dev->link_mode ^ value)
status |= DO_SETLINK_NOTIFY;
- dev->link_mode = value;
+ WRITE_ONCE(dev->link_mode, value);
write_unlock(&dev_base_lock);
}
--
2.43.0.594.gd9cf4e227d-goog
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