From ff879eb611dba859c4349048a32789e8c82afa91 Mon Sep 17 00:00:00 2001
From: stephen hemminger <shemminger@vyatta.com>
Date: Tue, 10 Nov 2009 07:54:56 +0000
Subject: [PATCH] CAN: use dev_get_by_index_rcu

Use new function to avoid doing read_lock().

Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Oliver Hartkopp <oliver@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 net/can/bcm.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/net/can/bcm.c b/net/can/bcm.c
index c302c2ec959c..e32af52238a2 100644
--- a/net/can/bcm.c
+++ b/net/can/bcm.c
@@ -139,13 +139,13 @@ static char *bcm_proc_getifname(char *result, int ifindex)
 	if (!ifindex)
 		return "any";
 
-	read_lock(&dev_base_lock);
-	dev = __dev_get_by_index(&init_net, ifindex);
+	rcu_read_lock();
+	dev = dev_get_by_index_rcu(&init_net, ifindex);
 	if (dev)
 		strcpy(result, dev->name);
 	else
 		strcpy(result, "???");
-	read_unlock(&dev_base_lock);
+	rcu_read_unlock();
 
 	return result;
 }