linux-kernel - Re: [PATCH 6/15] drivers/net/wireless/iwlegacy/4965-mac.c: adjust duplicate test

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Date:	Mon, 21 Jan 2013 13:07:20 +0100
From:	Stanislaw Gruszka <sgruszka@...hat.com>
To:	Julia Lawall <Julia.Lawall@...6.fr>
Cc:	kernel-janitors@...r.kernel.org,
	"John W. Linville" <linville@...driver.com>,
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/15] drivers/net/wireless/iwlegacy/4965-mac.c: adjust
 duplicate test

On Mon, Jan 21, 2013 at 02:02:50PM +0100, Julia Lawall wrote:
> From: Julia Lawall <Julia.Lawall@...6.fr>
> 
> Delete successive tests to the same location.  This looks like simple code
> duplication.
> 
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
> 
> // <smpl>
> @s exists@
> local idexpression y;
> expression x,e;
> @@
> 
> *if ( \(x == NULL\|IS_ERR(x)\|y != 0\) )
>  { ... when forall
>    return ...; }
> ... when != \(y = e\|y += e\|y -= e\|y |= e\|y &= e\|y++\|y--\|&y\)
>     when != \(XT_GETPAGE(...,y)\|WMI_CMD_BUF(...)\)
> *if ( \(x == NULL\|IS_ERR(x)\|y != 0\) )
>  { ... when forall
>    return ...; }
> // </smpl>
> 
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

ACK

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