[Xen-changelog] [xen-unstable] cpuidle: fix wrapped ticks calculation for pm timer.

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1276761018 -3600
# Node ID 7a00c0bd4fc131fb4de5df9f3fdc4e48a29dd5f9
# Parent  dab8676e97ce7a95c0777e58eee4b1b03bfc5322
cpuidle: fix wrapped ticks calculation for pm timer.

Signed-off-by: Wei Gang <gang.wei@xxxxxxxxx>
---
 xen/arch/x86/acpi/cpu_idle.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff -r dab8676e97ce -r 7a00c0bd4fc1 xen/arch/x86/acpi/cpu_idle.c
--- a/xen/arch/x86/acpi/cpu_idle.c      Thu Jun 17 08:02:27 2010 +0100
+++ b/xen/arch/x86/acpi/cpu_idle.c      Thu Jun 17 08:50:18 2010 +0100
@@ -138,9 +138,9 @@ static inline u32 ticks_elapsed(u32 t1, 
     if ( t2 >= t1 )
         return (t2 - t1);
     else if ( !(acpi_gbl_FADT.flags & ACPI_FADT_32BIT_TIMER) )
-        return (((0x00FFFFFF - t1) + t2) & 0x00FFFFFF);
+        return (((0x00FFFFFF - t1) + t2 + 1) & 0x00FFFFFF);
     else
-        return ((0xFFFFFFFF - t1) + t2);
+        return ((0xFFFFFFFF - t1) + t2 +1);
 }
 
 static void acpi_safe_halt(void)

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