linux-kernel - Re: [Xen-devel] [PATCH 3/4] x86/xen: sync the wallclock when the system time is stepped

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Date:	Thu, 20 Jun 2013 11:43:41 +0100
From:	"Jan Beulich" <JBeulich@...e.com>
To:	"David Vrabel" <david.vrabel@...rix.com>
Cc:	"John Stultz" <john.stultz@...aro.org>,
	"Thomas Gleixner" <tglx@...utronix.de>, <xen-devel@...ts.xen.org>,
	"Konrad Rzeszutek Wilk" <konrad.wilk@...cle.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [Xen-devel] [PATCH 3/4] x86/xen: sync the wallclock when
 the system time is stepped

>>> On 19.06.13 at 17:25, David Vrabel <david.vrabel@...rix.com> wrote:
> --- a/arch/x86/xen/time.c
> +++ b/arch/x86/xen/time.c
> @@ -211,6 +211,26 @@ static int xen_set_wallclock(const struct timespec *now)
>  
>  	return HYPERVISOR_dom0_op(&op);
>  }
> + 
> +static int xen_clock_was_set_notify(struct notifier_block *nb, unsigned long unused,
> +				    void *priv)
> +{
> +       struct timespec now;
> +       int ret;

Unused variable.

Jan

> +
> +       /*
> +        * Set the Xen wallclock from Linux system time.
> +        */
> +       now = current_kernel_time();
> +       xen_set_wallclock(&now);
> +
> +       return NOTIFY_OK;
> +}
> +
> +static struct notifier_block xen_clock_was_set_notifier = {
> +	.notifier_call = xen_clock_was_set_notify,
> +};
> +
>  
>  static struct clocksource xen_clocksource __read_mostly = {
>  	.name = "xen",


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