linux-kernel - Re: [Xen-devel] [PATCH 1/3] xen/pv-on-hvm kexec: add quirk for Xen 3.4 and shutdown watches.

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Date:	Mon, 15 Oct 2012 12:09:12 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Ian Campbell <Ian.Campbell@...rix.com>
Cc:	Olaf Hering <olaf@...fle.de>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: Re: [Xen-devel] [PATCH 1/3] xen/pv-on-hvm kexec: add quirk for Xen
 3.4 and shutdown watches.

On Mon, Oct 15, 2012 at 05:14:18PM +0100, Ian Campbell wrote:
> On Mon, 2012-10-15 at 17:05 +0100, Ian Campbell wrote:
> > 
> > > +static bool xen_strict_xenbus_quirk()
> > > +{
> > > +     uint32_t eax, ebx, ecx, edx, base;
> > > +
> > > +     base = xen_cpuid_base();
> > > +     cpuid(base + 1, &eax, &ebx, &ecx, &edx);
> > 
> > This breaks on ARM because this is an x86 specific function. Can we
> > ifdef it or properly wrap it in an arch interface please. 
> 
> Quick-n-dirty fix. 

applied. Thx
> 
> 8<----------------------------
> 
> >From fe19515d8f7bed49c4474f475e6a8cbbdc5eb3f2 Mon Sep 17 00:00:00 2001
> From: Ian Campbell <ian.campbell@...rix.com>
> Date: Mon, 15 Oct 2012 17:06:47 +0100
> Subject: [PATCH] xen: fix build on ARM
> 
> xen_strict_xenbus_quirk is x86 specific.
> 
> Signed-off-by: Ian Campbell <ian.campbell@...rix.com>
> ---
>  drivers/xen/xenbus/xenbus_xs.c |    6 ++++++
>  1 files changed, 6 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/xen/xenbus/xenbus_xs.c b/drivers/xen/xenbus/xenbus_xs.c
> index 48220e1..b46ad11 100644
> --- a/drivers/xen/xenbus/xenbus_xs.c
> +++ b/drivers/xen/xenbus/xenbus_xs.c
> @@ -619,6 +619,8 @@ static struct xenbus_watch *find_watch(const char *token)
>  
>  	return NULL;
>  }
> +
> +#ifdef CONFIG_X86
>  /*
>   * Certain older XenBus toolstack cannot handle reading values that are
>   * not populated. Some Xen 3.4 installation are incapable of doing this
> @@ -637,6 +639,10 @@ static bool xen_strict_xenbus_quirk()
>  	return false;
>  
>  }
> +#else
> +static bool xen_strict_xenbus_quirk(void) { return false; }
> +#endif
> +
>  static void xs_reset_watches(void)
>  {
>  	int err, supported = 0;
> -- 
> 1.7.2.5
> 
> 
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