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authorJan Beulich <JBeulich@novell.com>2011-07-19 11:53:07 +0100
committerIngo Molnar <mingo@elte.hu>2011-07-21 09:21:00 +0200
commitef68c8f87ed13f65df867dddf36c0e185b27b942 (patch)
tree5caf15b1d46697bda2201fd1625d498e64df9f01 /drivers
parentac619f4eba45da10053fc991f8a5d47b3be79fa3 (diff)
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x86: Serialize EFI time accesses on rtc_lock
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. Signed-off-by: Jan Beulich <jbeulich@novell.com> Acked-by: Matthew Garrett <mjg59@srcf.ucam.org> Cc: <mjg@redhat.com> Link: http://lkml.kernel.org/r/4E257E33020000780004E319@nat28.tlf.novell.com Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Matthew Garrett <mjg@redhat.com>
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