From: Jesper Dangaard Brouer <hawk@comx.dk>
Date: Fri, 26 Jun 2009 10:45:48 +0000 (+0000)
Subject: bridge: Use rcu_barrier() instead of syncronize_net() on unload.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=473c22d759e73cbbe604f41105b497817cc2ee8e;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

bridge: Use rcu_barrier() instead of syncronize_net() on unload.

When unloading modules that uses call_rcu() callbacks, then we must
use rcu_barrier().  This module uses syncronize_net() which is not
enough to be sure that all callback has been completed.

Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Jesper Dangaard Brouer <hawk@comx.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/net/bridge/br.c b/net/bridge/br.c
index 9aac5213105a..e1241c76239a 100644
--- a/net/bridge/br.c
+++ b/net/bridge/br.c
@@ -93,7 +93,7 @@ static void __exit br_deinit(void)
 
 	unregister_pernet_subsys(&br_net_ops);
 
-	synchronize_net();
+	rcu_barrier(); /* Wait for completion of call_rcu()'s */
 
 	br_netfilter_fini();
 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)