From: Yajun Deng <yajun.deng@linux.dev>
To: davem@davemloft.net, kuba@kernel.org
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Yajun Deng <yajun.deng@linux.dev>
Subject: [PATCH net-next] net: rtnetlink: convert rcu_assign_pointer to RCU_INIT_POINTER
Date: Sat, 18 Sep 2021 14:36:07 +0800 [thread overview]
Message-ID: <20210918063607.23681-1-yajun.deng@linux.dev> (raw)
It no need barrier when assigning a NULL value to an RCU protected
pointer. So use RCU_INIT_POINTER() instead for more fast.
Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
---
net/core/rtnetlink.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 972c8cb303a5..327ca6bc6e6d 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -301,7 +301,7 @@ int rtnl_unregister(int protocol, int msgtype)
}
link = rtnl_dereference(tab[msgindex]);
- rcu_assign_pointer(tab[msgindex], NULL);
+ RCU_INIT_POINTER(tab[msgindex], NULL);
rtnl_unlock();
kfree_rcu(link, rcu);
@@ -337,7 +337,7 @@ void rtnl_unregister_all(int protocol)
if (!link)
continue;
- rcu_assign_pointer(tab[msgindex], NULL);
+ RCU_INIT_POINTER(tab[msgindex], NULL);
kfree_rcu(link, rcu);
}
rtnl_unlock();
--
2.32.0
next reply other threads:[~2021-09-18 6:37 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-18 6:36 Yajun Deng [this message]
2021-09-19 12:00 ` [PATCH net-next] net: rtnetlink: convert rcu_assign_pointer to RCU_INIT_POINTER patchwork-bot+netdevbpf
2021-09-23 17:09 ` Eric Dumazet
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