linux-kernel - Re: [PATCH] fix warning: no return statement in function returning non-void in kernel/audit.c

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Message-ID: <9a8748490609111222w2dd313e3hc64cb36bca7f646a@mail.gmail.com>
Date:	Mon, 11 Sep 2006 21:22:15 +0200
From:	"Jesper Juhl" <jesper.juhl@...il.com>
To:	"Dave Jones" <davej@...hat.com>,
	"Jesper Juhl" <jesper.juhl@...il.com>,
	linux-kernel@...r.kernel.org, "Rickard Faith" <faith@...hat.com>
Subject: Re: [PATCH] fix warning: no return statement in function returning non-void in kernel/audit.c

On 11/09/06, Dave Jones <davej@...hat.com> wrote:
> On Mon, Sep 11, 2006 at 05:15:16PM +0200, Jesper Juhl wrote:
>  >
>  > kauditd_thread() is being used in a call to kthread_run(). kthread_run() expects
>  > a function returning 'int' which is also how kauditd_thread() is declared. Unfortunately
>  > kauditd_thread() neglects to return a value which results in this complaint from gcc :
>  >
>  >   kernel/audit.c:372: warning: no return statement in function returning non-void
>  >
>  > Easily fixed by just adding a 'return 0;' to kauditd_thread().
>
> Which will never be reached.

True, and gcc even seems to optimize it out, since the size of audit.o
doesn't change with the patch applied... So, it does no harm and it
silences the warning - so why not?
I guess one could add a small /* never reached */ comment...


> Does marking the function NORET_TYPE
> also silence the warning?
>

Nope :(

This is with gcc 4.1.1 btw.

-- 
Jesper Juhl <jesper.juhl@...il.com>
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