diff options
Diffstat (limited to 'arch/s390/kernel/process.c')
| -rw-r--r-- | arch/s390/kernel/process.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index 3201ae4..60055ce 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -23,14 +23,13 @@ #include <linux/kprobes.h> #include <linux/random.h> #include <linux/module.h> -#include <asm/system.h> #include <asm/io.h> #include <asm/processor.h> #include <asm/irq.h> #include <asm/timer.h> #include <asm/nmi.h> -#include <asm/compat.h> #include <asm/smp.h> +#include <asm/switch_to.h> #include "entry.h" asmlinkage void ret_from_fork(void) asm ("ret_from_fork"); @@ -76,16 +75,10 @@ static void default_idle(void) if (test_thread_flag(TIF_MCCK_PENDING)) { local_mcck_enable(); local_irq_enable(); - s390_handle_mcck(); return; } - trace_hardirqs_on(); - /* Don't trace preempt off for idle. */ - stop_critical_timings(); - /* Stop virtual timer and halt the cpu. */ + /* Halt the cpu and keep track of cpu time accounting. */ vtime_stop_cpu(); - /* Reenable preemption tracer. */ - start_critical_timings(); } void cpu_idle(void) @@ -93,13 +86,13 @@ void cpu_idle(void) for (;;) { tick_nohz_idle_enter(); rcu_idle_enter(); - while (!need_resched()) + while (!need_resched() && !test_thread_flag(TIF_MCCK_PENDING)) default_idle(); rcu_idle_exit(); tick_nohz_idle_exit(); - preempt_enable_no_resched(); - schedule(); - preempt_disable(); + if (test_thread_flag(TIF_MCCK_PENDING)) + s390_handle_mcck(); + schedule_preempt_disabled(); } } |
