[PATCH] x86_64: [PATCH] timer resume

At resume time, TSC's value or something similar might be changed a lot
against suspend time. This could make system gets a very big lost ticks.
See http://bugzilla.kernel.org/show_bug.cgi?id=5825

Signed-off-by: Shaohua Li<shaohua.li@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/x86_64/kernel/pmtimer.c b/arch/x86_64/kernel/pmtimer.c
index feb5f108dd26..8b2655ae4e61 100644
--- a/arch/x86_64/kernel/pmtimer.c
+++ b/arch/x86_64/kernel/pmtimer.c
@@ -80,6 +80,11 @@ int pmtimer_mark_offset(void)
         return lost - 1;
 }
 
+void pmtimer_resume(void)
+{
+        last_pmtmr_tick = inl(pmtmr_ioport);
+}
+
 unsigned int do_gettimeoffset_pm(void)
 {
         u32 now, offset, delta = 0;