linux-kernel - Re: N900 v3.19-rc5 arm atags_to

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Message-ID: <alpine.LFD.2.11.1501271014160.1322@knanqh.ubzr>
Date:	Tue, 27 Jan 2015 10:16:24 -0500 (EST)
From:	Nicolas Pitre <nicolas.pitre@...aro.org>
To:	Pavel Machek <pavel@....cz>
cc:	Tony Lindgren <tony@...mide.com>,
	Pali Rohár <pali.rohar@...il.com>,
	linux-omap <linux-omap@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Sebastian Reichel <sre@...nel.org>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org,
	Laura Abbott <lauraa@...eaurora.org>
Subject: Re: N900 v3.19-rc5 arm atags_to_fdt.c is broken

On Tue, 27 Jan 2015, Pavel Machek wrote:

> 
> > > > I would say, problem is because omap3-n900 binary DT is too large
> > 
> > I agree.
> > 
> > > OK if that's the case, then your patch makes sense to me. It also
> > > seems we can have the temporary stack be larger than the initial
> > > stack just for atags_to_fdt.
> > 
> > The stack size isn't the issue, but rather its location.  We need to 
> > position it away from the DT data.  The DT size is known and we could 
> > use that, plus some room for the insertion of new data coming from the
> > ATAG conversion.
> > 
> > Something like the following would be a more robust solution:
> 
> Tested-by: Pavel Machek <pavel@....cz>
> 
> (Note, that in 3.19 dts for n900 got too big, so we are actually
> triggering old bugs. That means that this is a regression fix, and
> should go in ASAP).

It is queued here:
http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=8294/1


Nicolas
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