linux-kernel - Re: [PATCH] powerpc: Fix alignment of secondary cpu spin vars

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Message-ID: <CAOesGMhHw-G-T7ZfNsVU92ftOucCNe9shNJtA7SWzqX=dQBQng@mail.gmail.com>
Date:	Sat, 28 Dec 2013 13:05:08 -0800
From:	Olof Johansson <olof@...om.net>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Anton Blanchard <anton@...ba.org>,
	Olof Johansson <olof@...om.net>
Subject: Re: [PATCH] powerpc: Fix alignment of secondary cpu spin vars

On Sat, Dec 28, 2013 at 1:01 PM, Olof Johansson <olof@...om.net> wrote:
> Commit 5c0484e25ec0 ('powerpc: Endian safe trampoline') resulted in
> losing proper alignment of the spinlock variables used when booting
> secondary CPUs, causing some quite odd issues with failing to boot on
> PA Semi-based systems.
>
> This showed itself on ppc64_defconfig, but not on pasemi_defconfig,
> so it had gone unnoticed when I initially tested the LE patch set.
>
> Fix is to add explicit alignment instead of relying on good luck. :)
>
> Fixes: 5c0484e25ec0 ('powerpc: Endian safe trampoline')
> Reported-by: Christian Zigotzky <chzigotzky@...osoft.de>
> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=67811
> Signed-off-by: Olof Johansson <olof@...om.net>

Sigh, it's not this after all. I did a clean build with this applied
and still see failures. Something else is (also?) going on here.


-Olof
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