x86: make sure we really have an hpet mapping before using it

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Impact: prepare the hpet code for Xen dom0 booting

When booting in Xen dom0, the hpet isn't really accessible, so make
sure the mapping is non-NULL before use.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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Jeremy Fitzhardinge 2008-12-16 12:32:23 -08:00 • committed by Ingo Molnar

parent bacbe99945

commit 39c04b5524

1 changed files with 3 additions and 2 deletions

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arch/x86/kernel/hpet.c

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