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Re: [Outreachy kernel] [PATCH] net: netfilter: remove unused variable

To: Arushi Singhal <arushisinghal19971997@xxxxxxxxx>
Subject: Re: [Outreachy kernel] [PATCH] net: netfilter: remove unused variable
Cc: outreachy-kernel@xxxxxxxxxxxxxxxx, Wensong Zhang <wensong@xxxxxxxxxxxx>, Simon Horman <horms@xxxxxxxxxxxx>, Julian Anastasov <ja@xxxxxx>, Pablo Neira Ayuso <pablo@xxxxxxxxxxxxx>, Jozsef Kadlecsik <kadlec@xxxxxxxxxxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, netdev@xxxxxxxxxxxxxxx, lvs-devel@xxxxxxxxxxxxxxx, netfilter-devel@xxxxxxxxxxxxxxx, coreteam@xxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
From: Julia Lawall <julia.lawall@xxxxxxx>
Date: Wed, 29 Mar 2017 16:16:35 +0200 (CEST)

On Wed, 29 Mar 2017, Arushi Singhal wrote:

> This patch uses the following coccinelle script to remove
> a variable that was simply used to store the return
> value of a function call before returning it:
>
> @@
> identifier len,f;
> @@
>
> -int len;
>  ... when != len
>      when strict
> -len =
> +return
>         f(...);
> -return len;
>
> Signed-off-by: Arushi Singhal <arushisinghal19971997@xxxxxxxxx>
> ---
>  net/netfilter/ipvs/ip_vs_ftp.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/net/netfilter/ipvs/ip_vs_ftp.c b/net/netfilter/ipvs/ip_vs_ftp.c
> index d30c327bb578..9e1e682610ef 100644
> --- a/net/netfilter/ipvs/ip_vs_ftp.c
> +++ b/net/netfilter/ipvs/ip_vs_ftp.c
> @@ -482,11 +482,9 @@ static struct pernet_operations ip_vs_ftp_ops = {
>
>  static int __init ip_vs_ftp_init(void)
>  {
> -     int rv;
>
> -     rv = register_pernet_subsys(&ip_vs_ftp_ops);
>       /* rcu_barrier() is called by netns on error */
> -     return rv;
> +     return register_pernet_subsys(&ip_vs_ftp_ops);

It looks like you end up with an unnecessary blank line at the beginning
of the function.

julia

>  }
>
>  /*
> --
> 2.11.0
>
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