linux-kernel - Re: [PATCH 14/14] [media] fix warning on v4l2_subdev

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Date:   Mon, 17 Jul 2017 23:23:11 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Hans Verkuil <hverkuil@...all.nl>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Tejun Heo <tj@...nel.org>, Guenter Roeck <linux@...ck-us.net>,
        IDE-ML <linux-ide@...r.kernel.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Niklas Söderlund <niklas.soderlund@...natech.se>,
        Robert Jarzmik <robert.jarzmik@...e.fr>,
        Daeseok Youn <daeseok.youn@...il.com>,
        Alan Cox <alan@...ux.intel.com>,
        adi-buildroot-devel@...ts.sourceforge.net,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        devel@...verdev.osuosl.org
Subject: Re: [PATCH 14/14] [media] fix warning on v4l2_subdev_call() result
 interpreted as bool

On Mon, Jul 17, 2017 at 4:35 PM, Hans Verkuil <hverkuil@...all.nl> wrote:
> On 17/07/17 16:26, Arnd Bergmann wrote:

>> Let me try again without ccache for now and see what warnings remain.
>> We can find a solution for those first, and then decide how to deal with
>> ccache.
>
> Sounds good.
>
> I'm OK with applying this if there is no other way to prevent these warnings.

Small update: I noticed that having ccache being the default compiler
even with CCACHE_DISABLE=1 causes a lot of these warnings. Completely
taking ccache out of the picture however seems to have eliminated the
warnings about v4l2_subdev_call() and other silly warnings, but not
the interesting ones in the -Wint-in-bool-context category.

       Arnd