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Date:	Fri, 26 Dec 2008 15:39:59 +0100
From:	"Hannes Eder" <>
To:	"David Miller" <>
Subject: Re: [PATCH 03/27] drivers/net: fix sparse warning: returning void-valued expression

On Fri, Dec 26, 2008 at 1:17 AM, David Miller <> wrote:
> From: Hannes Eder <>
> 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 <>
> 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.
> The types match, the function returns void and it is returning a void,
> what is the problem?

after reading the following thread I decided to submit such type of patches:

On Thu, 1 May 2008 at 13:53:39 +0100, Al Viro wrote:
> On Thu, May 01, 2008 at 03:42:14PM +0300, Boaz Harrosh wrote:
> > > 3. A return statement with an expression shall not appear in
> > > a function whose return type is void.
> > >
> >
> > Please forgive my ignorance, where is this quote from?
> C99.  I don't have C90 in front of me, so I can't give you exact quote from
> there, but it's been explicitly banned in C90 as well.

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