From 06a9701f4b3e3381dea96fee1cc8a3bb41b0a1f1 Mon Sep 17 00:00:00 2001
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Wed, 1 Dec 2010 01:37:42 +0000
Subject: [PATCH] __in_dev_get_rtnl() can use rtnl_dereference()
If caller holds RTNL, we dont need a memory barrier
(smp_read_barrier_depends) included in rcu_dereference().
Just use rtnl_dereference() to properly document the assertions.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/linux/inetdevice.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h
index 2b86eaf11773..ae8fdc54e0c0 100644
--- a/include/linux/inetdevice.h
+++ b/include/linux/inetdevice.h
@@ -222,7 +222,7 @@ static inline struct in_device *in_dev_get(const struct net_device *dev)
static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
{
- return rcu_dereference_check(dev->ip_ptr, lockdep_rtnl_is_held());
+ return rtnl_dereference(dev->ip_ptr);
}
extern void in_dev_finish_destroy(struct in_device *idev);
--
2.34.1