linux-kernel - RE: [PATCH] net: netfilter: Remove multiple assignment.

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Message-ID: <063D6719AE5E284EB5DD2968C1650D6DCFFBAC5F@AcuExch.aculab.com>
Date:   Mon, 27 Mar 2017 15:09:13 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Pablo Neira Ayuso' <pablo@...filter.org>,
        Arushi Singhal <arushisinghal19971997@...il.com>
CC:     Jozsef Kadlecsik <kadlec@...ckhole.kfki.hu>,
        "David S. Miller" <davem@...emloft.net>,
        "netfilter-devel@...r.kernel.org" <netfilter-devel@...r.kernel.org>,
        "coreteam@...filter.org" <coreteam@...filter.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "outreachy-kernel@...glegroups.com" 
        <outreachy-kernel@...glegroups.com>
Subject: RE: [PATCH] net: netfilter: Remove multiple assignment.

From: Pablo Neira Ayuso
> Sent: 27 March 2017 13:08
> On Sat, Mar 25, 2017 at 06:19:47PM +0530, Arushi Singhal wrote:
> > This patch removes multiple assignments.
> > Done using coccinelle.
> > @@
> > identifier i1,i2;
> > constant c;
> > @@
> > - i1=i2=c;
> > + i1=c;
> > + i2=c;
> 
> You have to explain why this is bad.

And your substituted code isn't equivalent.
The correct replacement is:
	i2 = c;
	i1 = i2;

	David