linux-kernel - Re: [PATCH] ARM: avoid ARCH_MMAP_RND

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Date:	Mon, 7 Dec 2015 08:21:00 +0100
From:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Daniel Cashman <dcashman@...gle.com>
Subject: Re: [PATCH] ARM: avoid ARCH_MMAP_RND_BITS for NOMMU

On Fri, Nov 27, 2015 at 03:04:03PM +0100, Arnd Bergmann wrote:
> ARM kernels with MMU disabled fail to build because of CONFIG_ARCH_MMAP_RND_BITS:
> 
> kernel/built-in.o:(.data+0x754): undefined reference to `mmap_rnd_bits'
> kernel/built-in.o:(.data+0x76c): undefined reference to `mmap_rnd_bits_min'
> kernel/built-in.o:(.data+0x770): undefined reference to `mmap_rnd_bits_max'
> 
> This changes the newly added line to only select this allow for
> MMU-enabled kernels.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 14570b3fd31a ("arm: mm: support ARCH_MMAP_RND_BITS")
> ---
> Found on yesterday's linux-next with ARM randconfig. The commit that
> introduced this is currently in Andrew's tree.
> 
> If you don't already have a fix, please either apply this patch on top,
> or fold it into the original patch.
hmm, our autobuilder still fails on this one because there has been no
next release since some time. I hope the best for tomorrow's build :-)

Anyhow, it fixes the build for efm32_defconfig, so

Acked-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

Best regards
Uwe

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