diff options
Diffstat (limited to 'arch/ia64/kernel/process.c')
-rw-r--r-- | arch/ia64/kernel/process.c | 83 |
1 files changed, 17 insertions, 66 deletions
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c index e34f565..a26fc64 100644 --- a/arch/ia64/kernel/process.c +++ b/arch/ia64/kernel/process.c @@ -209,41 +209,13 @@ do_notify_resume_user(sigset_t *unused, struct sigscratch *scr, long in_syscall) local_irq_disable(); /* force interrupt disable */ } -static int pal_halt = 1; -static int can_do_pal_halt = 1; - static int __init nohalt_setup(char * str) { - pal_halt = can_do_pal_halt = 0; + cpu_idle_poll_ctrl(true); return 1; } __setup("nohalt", nohalt_setup); -void -update_pal_halt_status(int status) -{ - can_do_pal_halt = pal_halt && status; -} - -/* - * We use this if we don't have any better idle routine.. - */ -void -default_idle (void) -{ - local_irq_enable(); - while (!need_resched()) { - if (can_do_pal_halt) { - local_irq_disable(); - if (!need_resched()) { - safe_halt(); - } - local_irq_enable(); - } else - cpu_relax(); - } -} - #ifdef CONFIG_HOTPLUG_CPU /* We don't actually take CPU down, just spin without interrupts. */ static inline void play_dead(void) @@ -270,50 +242,29 @@ static inline void play_dead(void) } #endif /* CONFIG_HOTPLUG_CPU */ -void __attribute__((noreturn)) -cpu_idle (void) +void arch_cpu_idle_dead(void) +{ + play_dead(); +} + +void arch_cpu_idle(void) { void (*mark_idle)(int) = ia64_mark_idle; - int cpu = smp_processor_id(); - - /* endless idle loop with no priority at all */ - while (1) { - rcu_idle_enter(); - if (can_do_pal_halt) { - current_thread_info()->status &= ~TS_POLLING; - /* - * TS_POLLING-cleared state must be visible before we - * test NEED_RESCHED: - */ - smp_mb(); - } else { - current_thread_info()->status |= TS_POLLING; - } - if (!need_resched()) { - void (*idle)(void); #ifdef CONFIG_SMP - min_xtp(); + min_xtp(); #endif - rmb(); - if (mark_idle) - (*mark_idle)(1); - - if (!idle) - idle = default_idle; - (*idle)(); - if (mark_idle) - (*mark_idle)(0); + rmb(); + if (mark_idle) + (*mark_idle)(1); + + safe_halt(); + + if (mark_idle) + (*mark_idle)(0); #ifdef CONFIG_SMP - normal_xtp(); + normal_xtp(); #endif - } - rcu_idle_exit(); - schedule_preempt_disabled(); - check_pgt_cache(); - if (cpu_is_offline(cpu)) - play_dead(); - } } void |