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@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 6f1c5537e8421bdb677e926e7fc9be1beb5ff969..fd47a4422a51dd3fade1776a4e26ba97b60843c1 100644 (file)
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -2956,7 +2956,7 @@ 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);
        }