From 6977a79d36baf8b295b1893621874202e1d02094 Mon Sep 17 00:00:00 2001
From: Igor Maravic <igorm@etf.rs>
Date: Fri, 25 Nov 2011 07:44:54 +0000
Subject: [PATCH] net: Fix skb_update_prio RCU usage.
Change function rcu_dereference to rcu_dereference_bh to avoid warning
[ INFO: suspicious RCU usage. ]
-------------------------------
net/core/dev.c:2459 suspicious rcu_dereference_check() usage!
because we are locking with
rcu_read_lock_bh();
in function dev_queue_xmit(struct sk_buff *skb)
Signed-off-by: Igor Maravic <igorm@etf.rs>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
net/core/dev.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/core/dev.c b/net/core/dev.c
index 91a599122074..278463e91e3a 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2473,7 +2473,7 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
#if IS_ENABLED(CONFIG_NETPRIO_CGROUP)
static void skb_update_prio(struct sk_buff *skb)
{
- struct netprio_map *map = rcu_dereference(skb->dev->priomap);
+ struct netprio_map *map = rcu_dereference_bh(skb->dev->priomap);
if ((!skb->priority) && (skb->sk) && map)
skb->priority = map->priomap[skb->sk->sk_cgrp_prioidx];
--
2.34.1