linux-kernel - Re: [PATCH RESEND 4] ARM: plat-versatile: move secondary CPU startup into cpuinit

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Message-ID: <CANM98qK4VighSAw5eZUuR20qCzbynR4rnR0ZTicp1VdUkRRjqg@mail.gmail.com>
Date:	Sat, 29 Dec 2012 23:09:38 -0500
From:	Christoffer Dall <c.dall@...tualopensystems.com>
To:	Claudio Fontana <Claudio.Fontana@...wei.com>
Cc:	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND 4] ARM: plat-versatile: move secondary CPU startup
 into cpuinit

On Tue, Dec 18, 2012 at 3:42 AM, Claudio Fontana
<Claudio.Fontana@...wei.com> wrote:
>
> Using __CPUINIT instead of __INIT puts the secondary CPU startup code
> into the "right" section: it will not be freed in hotplug configurations,
> allowing hot-add of cpus, while still getting freed in non-hotplug configs.
>
> Tested successfully on Fast-Models and on Arndale for VCPU hotplug.

not quite sure how testing on Arndale verifies this change?

>
> Signed-off-by: Claudio Fontana <claudio.fontana@...wei.com>
> Tested-by: Claudio Fontana <claudio.fontana@...wei.com>
>
> diff --git a/arch/arm/plat-versatile/headsmp.S b/arch/arm/plat-versatile/headsmp.S
> index dd703ef..19fe180 100644
> --- a/arch/arm/plat-versatile/headsmp.S
> +++ b/arch/arm/plat-versatile/headsmp.S
> @@ -11,7 +11,7 @@
>  #include <linux/linkage.h>
>  #include <linux/init.h>
>
> -       __INIT
> +       __CPUINIT
>
>  /*
>   * Realview/Versatile Express specific entry point for secondary CPUs.
> --
> 1.7.12.1
>

Otherwise looks ok to me (not guaranteeing that cpu hotplug will
magically work for KVM using this change though).

-Christoffer
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