linux-kernel - Re: [Xen-devel] [PATCH 2/2] x86/xen: sync the wallclock when the system time changes

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Message-ID: <51A65DD5.5050305@linaro.org>
Date:	Wed, 29 May 2013 12:58:13 -0700
From:	John Stultz <john.stultz@...aro.org>
To:	David Vrabel <david.vrabel@...rix.com>
CC:	Jan Beulich <JBeulich@...e.com>, xen-devel@...ts.xen.org,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [Xen-devel] [PATCH 2/2] x86/xen: sync the wallclock when the
 system time changes

On 05/29/2013 02:37 AM, David Vrabel wrote:
> On 29/05/13 08:47, Jan Beulich wrote:
>>>>> On 28.05.13 at 20:22, David Vrabel <david.vrabel@...rix.com> wrote:
>>> @@ -199,28 +201,59 @@ static void xen_get_wallclock(struct timespec *now)
>>>   
>>>   static int xen_set_wallclock(const struct timespec *now)
>>>   {
>>> -	struct xen_platform_op op;
>>> -	int ret;
>>> -
>>>   	/* do nothing for domU */
>>>   	if (!xen_initial_domain())
>>>   		return -1;
>>>   
>>> -	/* Set the Xen wallclock. */
>>> +	/* Set the hardware RTC. */
>>> +	return mach_set_rtc_mmss(now);
>>> +
>>> +}
>> Can't you achieve the same effect in a cleaner way by overriding
>> x86_platform.set_wallclock only in the non-init-domain case?
> Yes, that makes sense.  John, don't apply this one yet, thanks.
Ok. Zapped from my tree.

thanks
-john

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