linux-kernel - Re: linux-next: build warning after merge of the gpio tree

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Date:	Thu, 16 Jun 2016 12:02:24 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Stephen Rothwell <sfr@...b.auug.org.au>,
	Arnd Bergmann <arnd@...db.de>
Cc:	"linux-next@...r.kernel.org" <linux-next@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: linux-next: build warning after merge of the gpio tree

On Thu, Jun 16, 2016 at 6:32 AM, Stephen Rothwell <sfr@...b.auug.org.au> wrote:

> After merging the gpio tree, today's linux-next build (x86_64
> allmodconfig) produced this warning:
>
> In file included from drivers/gpio/gpiolib.c:25:0:
> drivers/gpio/gpiolib.c: In function 'lineevent_irq_thread':
> include/linux/kfifo.h:403:39: warning: 'ge.id' may be used uninitialized in this function [-Wmaybe-uninitialized]
>     )[__kfifo->in & __tmp->kfifo.mask] = \
>                                        ^
> drivers/gpio/gpiolib.c:657:24: note: 'ge.id' was declared here
>   struct gpioevent_data ge;
>                         ^
>
> Introduced by commit
>
>   61f922db7221 ("gpio: userspace ABI for reading GPIO line events")
>
> This is in the kfifo_put() call.

Thanks Stephen, Arnd has already helpfully made a patch to fix it :)

Yours,
Linus Walleij