linux-kernel - Re: [PATCH] RTC: Fix CMOS time error after writing /proc/acpi/alarm

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Date:	Wed, 25 Jun 2008 10:44:16 +0200
From:	Alessandro Zummo <alessandro.zummo@...ertech.it>
To:	rtc-linux@...glegroups.com
Cc:	huacai.chen@...el.com, <linux-acpi@...r.kernel.org>,
	<linux-pm@...ts.linux-foundation.org>, <lenb@...nel.org>,
	<p_gortmaker@...oo.com>, <linux-kernel@...r.kernel.org>,
	akpm@...ux-foundation.org
Subject: Re: [PATCH] RTC: Fix CMOS time error after writing /proc/acpi/alarm

On Mon, 23 Jun 2008 18:52:21 +0800
"Chen, Huacai" <huacai.chen@...el.com> wrote:

> From: Huacai Chen <huacai.chen@...el.com>
> 
> When writing /proc/acpi/alarm in adjust mode, e.g. 
> 	echo "+0000-00-00 00:00:15" >/proc/acpi/alarm 
> The "century" field should be read and added to "year" field before
> writing, otherwise the CMOS time will go back to 2000 years ago, e.g.
> 	# cat /proc/acpi/alarm
> 	0008-06-21 11:38:46 
> Then the system time may be reset to the date of manufacture after
> rebooting. This patch fixed this issue.
> 
> Signed-off-by: Huacai Chen <huacai.chen@...el.com>
> Acked-by: Pavel Machek <pavel@...e.cz>

 Acked-by: Alessandro Zummo <a.zummo@...ertech.it>

-- 

 Best regards,

 Alessandro Zummo,
  Tower Technologies - Torino, Italy

  http://www.towertech.it

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