linux-kernel - Re: [PATCH] drivers: Let several drivers depends on HAS_IOMEM for 'devm_ioremap

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Date:	Thu, 17 Jul 2014 13:24:46 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Richard Weinberger <richard@....at>
Cc:	Chen Gang <gang.chen.5i5j@...il.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	dmitry.torokhov@...il.com, linux-iio@...r.kernel.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>, teg@...m.no,
	Thierry Reding <thierry.reding@...il.com>,
	Lennox Wu <lennox.wu@...il.com>, Marek Vasut <marex@...x.de>,
	Liqin Chen <liqin.linux@...il.com>, msalter@...hat.com,
	linux-pwm@...r.kernel.org, devel@...verdev.osuosl.org,
	linux-watchdog@...r.kernel.org, linux-input@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	knaack.h@....de, Martin Schwidefsky <schwidefsky@...ibm.com>,
	Mischa.Jonker@...opsys.com, jic23@...nel.org,
	Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: [PATCH] drivers: Let several drivers depends on HAS_IOMEM for 'devm_ioremap_resource'

On Thursday 17 July 2014 12:58:55 Richard Weinberger wrote:
> > This is what I got upon trying earlier. I have not attempted to look into
> > why this is happening. Note this is on linux-next from yesterday,
> > not mainline as I incorrectly stated above.
> > 
> > In file included from ../arch/um/include/asm/fixmap.h:58:0,
> >                  from ../arch/um/include/asm/pgtable.h:11,
> >                  from ../include/linux/mm.h:51,
> >                  from ../kernel/uid16.c:6:
> > ../include/asm-generic/fixmap.h: In function 'fix_to_virt':
> > ../include/asm-generic/fixmap.h:31:2: error: size of unnamed array is negative
> >   BUILD_BUG_ON(idx >= __end_of_fixed_addresses);
> 
> So, this is next-20140716?
> I don't see the fixmap issue you're reporting, also not on the most recent next.

Sorry, nevermind. I had a workaround for a gcc-4.9 bug applied that
turned off optimization for uid16.c, which fixed the build for ARM for
me but happened to break x86 including uml.

Without that patch, I don't see this problem.

	Arnd
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