linux-kernel - Re: Build breakage due to latest ARM fixes

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Date:	Sun, 4 Aug 2013 11:47:04 -0700
From:	Olof Johansson <olof@...om.net>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
Subject: Re: Build breakage due to latest ARM fixes

On Sun, Aug 4, 2013 at 11:37 AM, Russell King - ARM Linux
<linux@....linux.org.uk> wrote:
> On Sun, Aug 04, 2013 at 11:20:21AM -0700, Olof Johansson wrote:
>> On Sun, Aug 4, 2013 at 5:53 AM, Russell King - ARM Linux
>> <linux@....linux.org.uk> wrote:
>> > On Sat, Aug 03, 2013 at 01:07:31AM +0100, Russell King - ARM Linux wrote:
>> >> I'll look into that.  Obviously, I never build nommu because it isn't
>> >> part of the build system and the nommu platform I do have - OKI67001 -
>> >> doesn't have mainline kernel support.  (And if it did, it would not be
>> >> DT, so I doubt it's submittable.)
>> >
>> > Okay, what I'm going to do is push the OKI67001 stuff into mainline
>> > irrespective of DT or not, so that I can then add noMMU build _and_
>> > boot tests to my build system, which should ensure that problems
>> > like that get detected before they're pushed upstream.
>>
>> That seems like a step backwards. How have !MMU changes been handled
>> until now? Someone external has been relied on for testing?
>
> No, they've had no testing as far as I'm aware.  noMMU never got to the
> stage when it was merged that it had any platforms before Hiyok went
> silent.
>
> The only real testing I'm aware of is when I recreated the OKI67001
> support a while back and got my board to boot.

Uwe has been busy pushing various patches for M3/M4 support, I don't
know how far it is from having some real hardware usable though. Uwe?

> As for qemu, software emulations while nice and convenient don't
> accurately reflect real hardware.

Oh, agreed, it doesn't beat hardware-based testing but in the absence
of hardware it's better than nothing.


-Olof
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