linux-kernel - Re: [PATCH] gpio: Remove superfluous include of io-mapping.h

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Date:   Wed, 24 Aug 2016 13:08:15 +0100
From:   Chris Wilson <chris@...is-wilson.co.uk>
To:     Linus Walleij <linus.walleij@...aro.org>
Cc:     "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Alexandre Courbot <gnurou@...il.com>
Subject: Re: [PATCH] gpio: Remove superfluous include of io-mapping.h

On Wed, Aug 24, 2016 at 01:55:28PM +0200, Linus Walleij wrote:
> On Tue, Aug 23, 2016 at 10:32 PM, Chris Wilson <chris@...is-wilson.co.uk> wrote:
> 
> > The io-mapping.h include arose from the need to workaround an arch/um
> > compile failure:
> >
> >    drivers/gpio/gpio-mpc8xxx.c: In function 'mpc8xxx_probe':
> >>> drivers/gpio/gpio-mpc8xxx.c:373:2: error: implicit declaration of
> >>> function 'iounmap' [-Werror=implicit-function-declaration]
> >      iounmap(mpc8xxx_gc->regs);
> >      ^~~~~~~
> >
> > from commit 296ad4acb8ef ("gpio: remove deps on
> > ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB") but io-mapping.h doesn't provide
> > iounmap so the problem persisted and eventually (will be) silenced by
> > making OF_GPIO depend on !NO_IOMEM (i.e. disabling building under
> > arch/um). My desire to remove the unneed include to io-mapping is to
> > simplify verification of changes to io-mapping.h
> >
> > Signed-off-by: Chris Wilson <chris@...is-wilson.co.uk>
> > Cc: Linus Walleij <linus.walleij@...aro.org>
> > Cc: Alexandre Courbot <gnurou@...il.com>
> > Cc: linux-gpio@...r.kernel.org
> 
> I chose to to a proper revert instead, but I have added your for
> Reported-by:

Thanks, this will help me hide from 0day as well :)
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre