[Xen-devel] [PATCH1/6] cpuidle: fix wrapped ticks calculation for pm timer

["Wei, Gang" <gang.wei@xxxxxxxxx>]

cpuidle: fix wrapped ticks calculation for pm timer.

Signed-off-by: Wei Gang <gang.wei@xxxxxxxxx>

diff -r 26c2922da53c xen/arch/x86/acpi/cpu_idle.c
--- a/xen/arch/x86/acpi/cpu_idle.c      Thu May 27 09:39:47 2010 +0100
+++ b/xen/arch/x86/acpi/cpu_idle.c      Sun Jun 13 06:44:32 2010 +0800
@@ -137,9 +137,9 @@ 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)

Attachment: 1-cpuidle-fix-ticks_elapsed.patch
Description: 1-cpuidle-fix-ticks_elapsed.patch

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