net: rtnetlink: convert rcu_assign_pointer to RCU_INIT_POINTER

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

diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index 972c8cb..327ca6b 100644 (file)
--- 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();