[PATCH] improve idle cputime accounting
Distinguish the cputime of the idle process where idle is actually using
cpu cycles from the cputime where idle is sleeping on an enabled wait psw.
The former is accounted as system time, the later as idle time.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/drivers/s390/s390mach.c b/drivers/s390/s390mach.c
index 834e9ee..92b0417 100644
--- a/drivers/s390/s390mach.c
+++ b/drivers/s390/s390mach.c
@@ -18,6 +18,7 @@
#include <asm/etr.h>
#include <asm/lowcore.h>
#include <asm/cio.h>
+#include <asm/cpu.h>
#include "s390mach.h"
static struct semaphore m_sem;
@@ -369,6 +370,8 @@
lockdep_off();
+ s390_idle_check();
+
mci = (struct mci *) &S390_lowcore.mcck_interruption_code;
mcck = &__get_cpu_var(cpu_mcck);
umode = user_mode(regs);