Signed-off-by: Thomas Gleixner Cc: Chris Metcalf --- arch/tile/kernel/process.c | 61 ++++----------------------------------------- arch/tile/kernel/smpboot.c | 2 - 2 files changed, 7 insertions(+), 56 deletions(-) Index: linux-2.6/arch/tile/kernel/process.c =================================================================== --- linux-2.6.orig/arch/tile/kernel/process.c +++ linux-2.6/arch/tile/kernel/process.c @@ -40,13 +40,11 @@ #include #include - /* * Use the (x86) "idle=poll" option to prefer low latency when leaving the * idle loop over low power while in the idle loop, e.g. if we have * one thread per core and we want to get threads out of futex waits fast. */ -static int no_idle_nap; static int __init idle_setup(char *str) { if (!str) @@ -54,64 +52,17 @@ static int __init idle_setup(char *str) if (!strcmp(str, "poll")) { pr_info("using polling idle threads.\n"); - no_idle_nap = 1; + cpu_idle_poll_ctrl(true); } else if (!strcmp(str, "halt")) - no_idle_nap = 0; - else - return -1; - - return 0; + return 0; + return -1; } early_param("idle", idle_setup); -/* - * The idle thread. There's no useful work to be - * done, so just try to conserve power and have a - * low exit latency (ie sit in a loop waiting for - * somebody to say that they'd like to reschedule) - */ -void cpu_idle(void) +void arch_cpu_idle(void) { - int cpu = smp_processor_id(); - - - current_thread_info()->status |= TS_POLLING; - - if (no_idle_nap) { - while (1) { - while (!need_resched()) - cpu_relax(); - schedule(); - } - } - - /* endless idle loop with no priority at all */ - while (1) { - tick_nohz_idle_enter(); - rcu_idle_enter(); - while (!need_resched()) { - if (cpu_is_offline(cpu)) - BUG(); /* no HOTPLUG_CPU */ - - local_irq_disable(); - __get_cpu_var(irq_stat).idle_timestamp = jiffies; - current_thread_info()->status &= ~TS_POLLING; - /* - * TS_POLLING-cleared state must be visible before we - * test NEED_RESCHED: - */ - smp_mb(); - - if (!need_resched()) - _cpu_idle(); - else - local_irq_enable(); - current_thread_info()->status |= TS_POLLING; - } - rcu_idle_exit(); - tick_nohz_idle_exit(); - schedule_preempt_disabled(); - } + __get_cpu_var(irq_stat).idle_timestamp = jiffies; + _cpu_idle(); } /* Index: linux-2.6/arch/tile/kernel/smpboot.c =================================================================== --- linux-2.6.orig/arch/tile/kernel/smpboot.c +++ linux-2.6/arch/tile/kernel/smpboot.c @@ -207,7 +207,7 @@ void __cpuinit online_secondary(void) /* Set up tile-timer clock-event device on this cpu */ setup_tile_timer(); - cpu_idle(); + cpu_startup_entry(CPUHP_ONLINE); } int __cpuinit __cpu_up(unsigned int cpu, struct task_struct *tidle) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/