From: WANG Cong <xiyou.wangcong@gmail.com>
Date: Tue, 29 Nov 2016 17:14:56 +0000 (-0800)
Subject: audit: remove useless synchronize_net()
X-Git-Tag: v4.10-rc1~202^2~136
X-Git-Url: https://git.kernelconcepts.de/?p=karo-tx-linux.git;a=commitdiff_plain;h=60602982720f3a77366ee3e493a6e3d15e7e84f5

audit: remove useless synchronize_net()

netlink kernel socket is protected by refcount, not RCU.
Its rcv path is neither protected by RCU. So the synchronize_net()
is just pointless.

Cc: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/kernel/audit.c b/kernel/audit.c
index 92c463d2d1c7..67b9fbd871be 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1172,9 +1172,8 @@ static void __net_exit audit_net_exit(struct net *net)
 		audit_sock = NULL;
 	}
 
-	RCU_INIT_POINTER(aunet->nlsk, NULL);
-	synchronize_net();
 	netlink_kernel_release(sock);
+	aunet->nlsk = NULL;
 }
 
 static struct pernet_operations audit_net_ops __net_initdata = {