[PATCH 3/4] ip_tunnel: delete unneeded call to netdev_priv

[PATCH 3/4] ip_tunnel: delete unneeded call to netdev_priv

[Julia Lawall]

From: Julia Lawall <Julia.Lawall@lip6.fr>

Netdev_priv is an accessor function, and has no purpose if its result is
not used.

A simplified version of the semantic match that fixes this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@ local idexpression x; @@
-x = netdev_priv(...);
... when != x
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

---
 net/ipv4/ip_tunnel.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
index b3f8597..059176d 100644
--- a/net/ipv4/ip_tunnel.c
+++ b/net/ipv4/ip_tunnel.c
@@ -395,11 +395,10 @@ static struct ip_tunnel *ip_tunnel_create(struct net *net,
 					  struct ip_tunnel_net *itn,
 					  struct ip_tunnel_parm *parms)
 {
-	struct ip_tunnel *nt, *fbt;
+	struct ip_tunnel *nt;
 	struct net_device *dev;
 
 	BUG_ON(!itn->fb_tunnel_dev);
-	fbt = netdev_priv(itn->fb_tunnel_dev);
 	dev = __ip_tunnel_create(net, itn->fb_tunnel_dev->rtnl_link_ops, parms);
 	if (IS_ERR(dev))
 		return ERR_CAST(dev);

Re: [PATCH 3/4] ip_tunnel: delete unneeded call to netdev_priv

[David Miller]

From: Julia Lawall <Julia.Lawall@lip6.fr>
Date: Thu, 15 May 2014 05:43:20 +0200

> From: Julia Lawall <Julia.Lawall@lip6.fr>
> 
> Netdev_priv is an accessor function, and has no purpose if its result is
> not used.
> 
> A simplified version of the semantic match that fixes this problem is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @@ local idexpression x; @@
> -x = netdev_priv(...);
> ... when != x
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>

Applied.