linux-kernel - Re: [PATCH] kconfig: plug false-positive warning in get_prompt

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Message-ID: <20140623054813.GG13440@pengutronix.de>
Date:	Mon, 23 Jun 2014 07:48:14 +0200
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	Konstantin Khlebnikov <koct9i@...il.com>
Cc:	"Yann E. MORIN" <yann.morin.1998@...e.fr>,
	linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kconfig: plug false-positive warning in get_prompt_str()
 seen with gcc-4.9

Hello,

On Sun, May 25, 2014 at 08:47:51PM +0400, Konstantin Khlebnikov wrote:
> scripts/kconfig/menu.c: In function ‘get_symbol_str’:
> scripts/kconfig/menu.c:590:18: warning: ‘jump’ may be used uninitialized in this function [-Wmaybe-uninitialized]
>      jump->offset = strlen(r->s);
>                   ^
> scripts/kconfig/menu.c:551:19: note: ‘jump’ was declared here
>   struct jump_key *jump;
>                    ^

I'm seeing that problem with a 4.8.2 toolchain on next-20140623 with
ARCH=arm, too.

Maybe better use uninitialized_var? And point out the commit that
introduced the issue please.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
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