linux-kernel - Re: [PATCH v1 net-next] net: merge redundancy judgement

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Message-Id: <20150429.002816.509194069032518571.davem@davemloft.net>
Date:	Wed, 29 Apr 2015 00:28:16 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	martinbj2008@...il.com
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 net-next] net: merge redundancy judgement

From: Martin Zhang <martinbj2008@...il.com>
Date: Wed, 29 Apr 2015 11:35:59 +0800

> 'if' and 'elseif' do the same operation,
> so merge then into a case.
> 
> Signed-off-by: Martin Zhang <martinbj2008@...il.com>
> ---
>  net/ipv4/route.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/net/ipv4/route.c b/net/ipv4/route.c
> index ad50643..9b5468c 100644
> --- a/net/ipv4/route.c
> +++ b/net/ipv4/route.c
> @@ -802,11 +802,8 @@ static struct dst_entry *ipv4_negative_advice(struct dst_entry *dst)
>  	struct dst_entry *ret = dst;
>  
>  	if (rt) {
> -		if (dst->obsolete > 0) {
> -			ip_rt_put(rt);
> -			ret = NULL;
> -		} else if ((rt->rt_flags & RTCF_REDIRECTED) ||
> -			   rt->dst.expires) {
> +		if (dst->obsolete > 0 || (rt->rt_flags & RTCF_REDIRECTED)
> +		 || rt->dst.expires) {

Never begin lines with conditional operators.  Rather, end lines with
conditional operators, as it was in the original code.
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