[PATCH] improve precision of idle time detection.

Increase the precision of the idle time calculation that is exported
to user space via /sys/devices/system/cpu/cpu<x>/idle_time_us

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/arch/s390/include/asm/cpu.h b/arch/s390/include/asm/cpu.h
index e5a6a9ba3adf..89456df43c4a 100644
--- a/arch/s390/include/asm/cpu.h
+++ b/arch/s390/include/asm/cpu.h
@@ -14,7 +14,6 @@
 
 struct s390_idle_data {
         spinlock_t lock;
-        unsigned int in_idle;
         unsigned long long idle_count;
         unsigned long long idle_enter;
         unsigned long long idle_time;
@@ -26,7 +25,7 @@ void s390_idle_leave(void);
 
 static inline void s390_idle_check(void)
 {
-        if ((&__get_cpu_var(s390_idle))->in_idle)
+        if ((&__get_cpu_var(s390_idle))->idle_enter != 0ULL)
                 s390_idle_leave();
 }