[PATCH] ipv6: remove unused function ipv6_skb_idev()

[PATCH] ipv6: remove unused function ipv6_skb_idev()

[Lukas Bulwahn]

Commit bdb7cc643fc9 ("ipv6: Count interface receive statistics on the
ingress netdev") removed all callees for ipv6_skb_idev(). Hence, since
then, ipv6_skb_idev() is unused and make CC=clang W=1 warns:

  net/ipv6/exthdrs.c:909:33:
    warning: unused function 'ipv6_skb_idev' [-Wunused-function]

So, remove this unused function and a -Wunused-function warning.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>
---
Alexey, Hideaki-san, please ack.

David, Jakub, please pick this minor non-urgent clean-up patch.

 net/ipv6/exthdrs.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 374105e4394f..584d1b06eb90 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -906,10 +906,6 @@ void ipv6_exthdrs_exit(void)
 /*
  * Note: we cannot rely on skb_dst(skb) before we assign it in ip6_route_input().
  */
-static inline struct inet6_dev *ipv6_skb_idev(struct sk_buff *skb)
-{
-	return skb_dst(skb) ? ip6_dst_idev(skb_dst(skb)) : __in6_dev_get(skb->dev);
-}
 
 static inline struct net *ipv6_skb_net(struct sk_buff *skb)
 {
-- 
2.17.1

Re: [PATCH] ipv6: remove unused function ipv6_skb_idev()

[Nathan Chancellor]

On Fri, Nov 13, 2020 at 02:50:12PM +0100, Lukas Bulwahn wrote:
> Commit bdb7cc643fc9 ("ipv6: Count interface receive statistics on the
> ingress netdev") removed all callees for ipv6_skb_idev(). Hence, since
> then, ipv6_skb_idev() is unused and make CC=clang W=1 warns:
> 
>   net/ipv6/exthdrs.c:909:33:
>     warning: unused function 'ipv6_skb_idev' [-Wunused-function]
> 
> So, remove this unused function and a -Wunused-function warning.
> 
> Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>

Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>

> ---
> Alexey, Hideaki-san, please ack.
> 
> David, Jakub, please pick this minor non-urgent clean-up patch.
> 
>  net/ipv6/exthdrs.c | 4 ----
>  1 file changed, 4 deletions(-)
> 
> diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
> index 374105e4394f..584d1b06eb90 100644
> --- a/net/ipv6/exthdrs.c
> +++ b/net/ipv6/exthdrs.c
> @@ -906,10 +906,6 @@ void ipv6_exthdrs_exit(void)
>  /*
>   * Note: we cannot rely on skb_dst(skb) before we assign it in ip6_route_input().
>   */
> -static inline struct inet6_dev *ipv6_skb_idev(struct sk_buff *skb)
> -{
> -	return skb_dst(skb) ? ip6_dst_idev(skb_dst(skb)) : __in6_dev_get(skb->dev);
> -}
>  
>  static inline struct net *ipv6_skb_net(struct sk_buff *skb)
>  {
> -- 
> 2.17.1
> 

Re: [PATCH] ipv6: remove unused function ipv6_skb_idev()

[Jakub Kicinski]

On Fri, 13 Nov 2020 11:36:49 -0700 Nathan Chancellor wrote:
> On Fri, Nov 13, 2020 at 02:50:12PM +0100, Lukas Bulwahn wrote:
> > Commit bdb7cc643fc9 ("ipv6: Count interface receive statistics on the
> > ingress netdev") removed all callees for ipv6_skb_idev(). Hence, since
> > then, ipv6_skb_idev() is unused and make CC=clang W=1 warns:
> > 
> >   net/ipv6/exthdrs.c:909:33:
> >     warning: unused function 'ipv6_skb_idev' [-Wunused-function]
> > 
> > So, remove this unused function and a -Wunused-function warning.
> > 
> > Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com>  
> 
> Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>

Applied, thanks!