linux-kernel - Re: [PATCH 3/9] virt/kvm: correct error-handling code

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Date:	Wed, 09 Sep 2009 17:42:19 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Julia Lawall <julia@...u.dk>
CC:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 3/9] virt/kvm: correct error-handling code

On 07/28/2009 06:53 PM, Julia Lawall wrote:
> From: Julia Lawall<julia@...u.dk>
>
> This code is not executed before file has been initialized to the result of
> calling eventfd_fget.  This function returns an ERR_PTR value in an error
> case instead of NULL.  Thus the test that file is not NULL is always true.
>
> A simplified version of the semantic match that finds this problem is as
> follows: (http://coccinelle.lip6.fr/)
>
> //<smpl>
> @match exists@
> expression x, E;
> statement S1, S2;
> @@
>
> x = eventfd_fget(...)
> ... when != x = E
> (
> *  if (x == NULL || ...) S1 else S2
> |
> *  if (x == NULL&&  ...) S1 else S2
> )
> //</smpl>
>
>    

Applied, thanks (yes, old patch, missed it).

-- 
error compiling committee.c: too many arguments to function

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