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a3a00751ad
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john stultz a3a00751ad [PATCH] x86_64: fix hpet for systems that don't support legacy replacement 
Currently the x86-64 HPET code assumes the entire HPET implementation from
the spec is present.  This breaks on boxes that do not implement the
optional legacy timer replacement functionality portion of the spec.

This patch fixes this issue, allowing x86-64 systems that cannot use the
HPET for the timer interrupt and RTC to still use the HPET as a time
source.  I've tested this patch on a system systems without HPET, with HPET
but without legacy timer replacement, as well as HPET with legacy timer
replacement.

This version adds a minor check to cap the HPET counter value in
gettimeoffset_hpet to avoid possible time inconsistencies.  Please ignore
the A2 version I sent to you earlier.

Acked-by: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-06-23 09:45:12 -07:00
..
alpha [PATCH] update all defconfigs for ARCH_DISCONTIGMEM_ENABLE 2005-06-23 09:45:02 -07:00
arm [PATCH] use ${CROSS_COMPILE}installkernel in arch/*/boot/install.sh 2005-06-23 09:45:07 -07:00
arm26 [PATCH] use ${CROSS_COMPILE}installkernel in arch/*/boot/install.sh 2005-06-23 09:45:07 -07:00
cris [PATCH] make each arch use mm/Kconfig 2005-06-23 09:45:02 -07:00
frv [PATCH] make each arch use mm/Kconfig 2005-06-23 09:45:02 -07:00
h8300 [PATCH] make each arch use mm/Kconfig 2005-06-23 09:45:02 -07:00
i386 [PATCH] mtrr size-and-base debugging 2005-06-23 09:45:12 -07:00
ia64 [PATCH] ia64: Selectable Timer Interrupt Frequency 2005-06-23 09:45:10 -07:00
m32r [PATCH] make each arch use mm/Kconfig 2005-06-23 09:45:02 -07:00
m68k [PATCH] make each arch use mm/Kconfig 2005-06-23 09:45:02 -07:00
m68knommu [PATCH] make each arch use mm/Kconfig 2005-06-23 09:45:02 -07:00
mips [PATCH] mm/Kconfig: kill unused ARCH_FLATMEM_DISABLE 2005-06-23 09:45:03 -07:00
parisc [PATCH] mm/Kconfig: kill unused ARCH_FLATMEM_DISABLE 2005-06-23 09:45:03 -07:00
ppc [PATCH] make each arch use mm/Kconfig 2005-06-23 09:45:02 -07:00
ppc64 [PATCH] use ${CROSS_COMPILE}installkernel in arch/*/boot/install.sh 2005-06-23 09:45:07 -07:00
s390 [PATCH] use ${CROSS_COMPILE}installkernel in arch/*/boot/install.sh 2005-06-23 09:45:07 -07:00
sh [PATCH] mm/Kconfig: kill unused ARCH_FLATMEM_DISABLE 2005-06-23 09:45:03 -07:00
sh64 [PATCH] make each arch use mm/Kconfig 2005-06-23 09:45:02 -07:00
sparc [PATCH] make each arch use mm/Kconfig 2005-06-23 09:45:02 -07:00
sparc64 [PATCH] make each arch use mm/Kconfig 2005-06-23 09:45:02 -07:00
um [PATCH] make each arch use mm/Kconfig 2005-06-23 09:45:02 -07:00
v850 [PATCH] make each arch use mm/Kconfig 2005-06-23 09:45:02 -07:00
x86_64 [PATCH] x86_64: fix hpet for systems that don't support legacy replacement 2005-06-23 09:45:12 -07:00