Merge branch 'linux-next' of git://git.infradead.org/~dedekind/ubi-2.6

[linux-2.6] / arch / s390 / kernel / process.c

diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c
index 7920861109d2aa074de0ca9ae96f2c99d3c44b24..9839767d0842e5d065524181db75aa075c154798 100644 (file)
--- a/arch/s390/kernel/process.c
+++ b/arch/s390/kernel/process.c
@@ -75,46 +75,19 @@ unsigned long thread_saved_pc(struct task_struct *tsk)
        return sf->gprs[8];
 }
 
-/*
- * Need to know about CPUs going idle?
- */
-static ATOMIC_NOTIFIER_HEAD(idle_chain);
 DEFINE_PER_CPU(struct s390_idle_data, s390_idle);
 
-int register_idle_notifier(struct notifier_block *nb)
-{
-       return atomic_notifier_chain_register(&idle_chain, nb);
-}
-EXPORT_SYMBOL(register_idle_notifier);
-
-int unregister_idle_notifier(struct notifier_block *nb)
-{
-       return atomic_notifier_chain_unregister(&idle_chain, nb);
-}
-EXPORT_SYMBOL(unregister_idle_notifier);
-
 static int s390_idle_enter(void)
 {
        struct s390_idle_data *idle;
-       int nr_calls = 0;
-       void *hcpu;
-       int rc;
 
-       hcpu = (void *)(long)smp_processor_id();
-       rc = __atomic_notifier_call_chain(&idle_chain, S390_CPU_IDLE, hcpu, -1,
-                                         &nr_calls);
-       if (rc == NOTIFY_BAD) {
-               nr_calls--;
-               __atomic_notifier_call_chain(&idle_chain, S390_CPU_NOT_IDLE,
-                                            hcpu, nr_calls, NULL);
-               return rc;
-       }
        idle = &__get_cpu_var(s390_idle);
        spin_lock(&idle->lock);
        idle->idle_count++;
        idle->in_idle = 1;
        idle->idle_enter = get_clock();
        spin_unlock(&idle->lock);
+       vtime_stop_cpu_timer();
        return NOTIFY_OK;
 }
 
@@ -122,13 +95,12 @@ void s390_idle_leave(void)
 {
        struct s390_idle_data *idle;
 
+       vtime_start_cpu_timer();
        idle = &__get_cpu_var(s390_idle);
        spin_lock(&idle->lock);
        idle->idle_time += get_clock() - idle->idle_enter;
        idle->in_idle = 0;
        spin_unlock(&idle->lock);
-       atomic_notifier_call_chain(&idle_chain, S390_CPU_NOT_IDLE,
-                                  (void *)(long) smp_processor_id());
 }
 
 extern void s390_handle_mcck(void);
@@ -170,7 +142,7 @@ static void default_idle(void)
 void cpu_idle(void)
 {
        for (;;) {
-               tick_nohz_stop_sched_tick();
+               tick_nohz_stop_sched_tick(1);
                while (!need_resched())
                        default_idle();
                tick_nohz_restart_sched_tick();