Re: [PATCH] x86: serialize EFI time accesses on rtc_lock

From: Matthew Garrett
Date: Tue Jul 19 2011 - 07:19:48 EST

On Tue, Jul 19, 2011 at 11:53:07AM +0100, Jan Beulich wrote:
> The EFI specification requires that callers of the time related runtime
> functions serialize with other CMOS accesses in the kernel, as the EFI
> time functions may choose to also use the legacy CMOS RTC.
> Besides fixing a latent bug, this is a prerequisite to safely enable
> the rtc-efi driver for x86, which ought to be preferred over rtc-cmos
> on all EFI platforms.

ACK in principle, although I've just merged this and the IA64 code
together which makes that more awkward. I can fix it up, though.

Matthew Garrett | mjg59@xxxxxxxxxxxxx
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