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Date: Wed, 21 May 2008 15:32:23 -0700
From: Andrew Morton <akpm@linux-foundation.org>
To: Stas Sergeev <stsp@aknet.ru>
Cc: linux-kernel@vger.kernel.org, dbrownell@users.sourceforge.net,
       Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
       stable@kernel.org
Subject: Re: [patch] provide rtc_cmos platform device
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On Tue, 20 May 2008 22:25:56 +0400
Stas Sergeev <stsp@aknet.ru> wrote:

> Hello.
> 
> Recently (around 2.6.25) I've noticed
> that RTC no longer works for me.

So it's a regression.

> It turned out this is because I use
> pnpacpi=off kernel option to work
> around the parport_pc bugs.
> I always did so, but RTC used to work
> fine in the past, and now it have
> regressed.

Albeit a fairly obscure one.  I tagged the patch for backporting, let
those guys decide ;)

> The attached patch fixes the problem
> by creating the platform device for
> the RTC when PNP is disabled.
> This may also help running the
> PNP-enabled kernel on an older PCs.
> 
> Signed-off-by: Stas Sergeev <stsp@aknet.ru>

I suppose that on this basis:

 arch/x86/kernel/rtc.c  |   31 +++++++++++++++++++++++++++++++
 drivers/rtc/rtc-cmos.c |   26 +++++++++-----------------
 include/asm-x86/rtc.h  |    4 ++++

it should be considered an x86 patch.  I shall treat it as such.

Thanks.