linux-kernel - Re: [PATCH 03/27] drivers/net: fix sparse warning: returning void-valued expression

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Date:	Sat, 27 Dec 2008 20:20:12 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Hannes Eder <hannes@...neseder.net>
Cc:	Randy Dunlap <rdunlap@...otime.net>,
	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/27] drivers/net: fix sparse warning: returning void-valued expression

On Sat, Dec 27, 2008 at 08:11:11PM +0100, Hannes Eder wrote:
> On 12/26/08, Randy Dunlap <rdunlap@...otime.net> wrote:
> > On Thu, 25 Dec 2008 16:17:40 -0800 (PST)
> >  
> > David Miller <davem@...emloft.net> wrote:
> >  
> >  
> > > From: Hannes Eder <hannes@...neseder.net>
> >  > Date: Mon, 22 Dec 2008 20:15:17 +0100
> >  >
> >  > > Fix this sparse warning:
> >  > >
> >  > >   drivers/net/niu.c:8850:2: warning: returning void-valued expression
> >  > >
> >  > > Signed-off-by: Hannes Eder <hannes@...neseder.net>
> >  >
> >  > Can we just fix sparse not to generate this warning?  It's
> >  > marginal, at best.  C++ even explicitly defines this as valid
> >  > and last time I brought this up Linus even agreed.
> >  
> >  
> > Ack, I discussed it with him also and he thought that
> >  they were just fine as they were...
> >  
> > 
> >  > The types match, the function returns void and it is returning a void,
> >  > what is the problem?
> 
> In fact there is no need to _fix_ sparse, as there is a command line option
> -Wreturn-void / -Wno-return-void, so we could change the Makefile, see diff
> below.

It is default off but out use of "-Wall" turn it on.
So your patch is the right approach.

Can you please re-send it with a proper changelog and signed-off.

	Sam
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