linux-kernel - Re: [PATCH] input: Silence 'unused variable' warning in iforce joystick driver

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Date:	Fri, 31 Aug 2007 11:26:42 -0400
From:	"Dmitry Torokhov" <dmitry.torokhov@...il.com>
To:	"Jesper Juhl" <jesper.juhl@...il.com>
Cc:	"Satyam Sharma" <satyam@...radead.org>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Vojtech Pavlik" <vojtech@....cz>,
	"Johann Deneux" <johann.deneux@...il.com>,
	linux-input@...ey.karlin.mff.cuni.cz,
	linux-joystick@...ey.karlin.mff.cuni.cz
Subject: Re: [PATCH] input: Silence 'unused variable' warning in iforce joystick driver

Hi Jesper,

On 8/30/07, Jesper Juhl <jesper.juhl@...il.com> wrote:
> On 31/08/2007, Satyam Sharma <satyam@...radead.org> wrote:
> ...
> >
> > Hmm, would this not still give a warning when JOYSTICK_IFORCE_USB=y?
>
> Arrgh, I messed that one up real good...  Thank you for your keen eye Satyam :-)
>
>
> > [ I didn't know mixing code and declarations (not at top of statement
> >   block) was accepted style in the kernel ... ]
> >
> It's not the common case, but this is certainly not the only place in the kernel where we do it.
>
>
> > IMHO either you should at least wrap that case inside a {} of its
> > own (so that the int status; is at top of a statement block), or else,
>
> Yeah, I should...
>
> > preferably, just add "__maybe_unused" to the first declaration that you
> > removed just now.
> >
>
> Here's an updated patch that actually works as intended.
>

I had a similar patch from Andrew Morton in my queue and it just got
merged. There should be no warning anymore.

-- 
Dmitry
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