linux-kernel - Re: [PATCH 1/3] rtc-efi: register rtc-efi device when EFI enabled

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Message-ID: <3fa7337e-6bbc-4462-9704-2d8ac20a9cf2@email.android.com>
Date:	Fri, 28 Dec 2012 11:07:11 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Matthew Garrett <matthew.garrett@...ula.com>,
	"Lee, Chun-Yi" <joeyli.kernel@...il.com>
CC:	"matt.fleming@...el.com" <matt.fleming@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	"Lee, Chun-Yi" <jlee@...e.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>, Jan Beulich <JBeulich@...e.com>
Subject: Re: [PATCH 1/3] rtc-efi: register rtc-efi device when EFI enabled

We do have such machines, which is why this change has been reverted twice already.  I believe we should stick to the priority scheme I proposed a few weeks ago.

Matthew Garrett <matthew.garrett@...ula.com> wrote:

>On Sat, 2012-12-29 at 00:26 +0800, Lee, Chun-Yi wrote:
>> UEFI time services, GetTime(), SetTime(), GetWakeupTime(),
>SetWakeupTime() are also
>> supported by other non-IA64 architecutre with UEFI BIOS, e.g. x86.
>> 
>> This patch changed RTC_DRV_EFI configuration to depend on EFI but not
>just IA64. It
>> checks efi_enabled flag and efi-rtc driver should enabled.
>
>In theory, certainly - but do we still have machines that explode if
>the
>get_time call is made? We may also want to think about disabling the
>legacy access to the RTC if the EFI calls are present.

-- 
Sent from my mobile phone. Please excuse brevity and lack of formatting.
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