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author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-28 16:14:17 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-28 16:14:17 -0700 |
commit | e4f2e5eaac8f5f903ca4a8cc944d26e68745d6bb (patch) | |
tree | 1a8d89561fa5b231202d5287acc2683eccadee7f /drivers/acpi | |
parent | 9a90e09854a3c7cc603ab8fc9163f77bb1f66cfa (diff) | |
parent | 2671717265ae6e720a9ba5f13fbec3a718983b65 (diff) | |
download | linux-e4f2e5eaac8f5f903ca4a8cc944d26e68745d6bb.tar.bz2 |
Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6
* 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6:
intel_idle: native hardware cpuidle driver for latest Intel processors
ACPI: acpi_idle: touch TS_POLLING only in the non-MWAIT case
acpi_pad: uses MONITOR/MWAIT, so it doesn't need to clear TS_POLLING
sched: clarify commment for TS_POLLING
ACPI: allow a native cpuidle driver to displace ACPI
cpuidle: make cpuidle_curr_driver static
cpuidle: add cpuidle_unregister_driver() error check
cpuidle: fail to register if !CONFIG_CPU_IDLE
Diffstat (limited to 'drivers/acpi')
-rw-r--r-- | drivers/acpi/acpi_pad.c | 9 | ||||
-rw-r--r-- | drivers/acpi/processor_driver.c | 15 | ||||
-rw-r--r-- | drivers/acpi/processor_idle.c | 28 |
3 files changed, 26 insertions, 26 deletions
diff --git a/drivers/acpi/acpi_pad.c b/drivers/acpi/acpi_pad.c index f169e516a1af..d269a8f3329c 100644 --- a/drivers/acpi/acpi_pad.c +++ b/drivers/acpi/acpi_pad.c @@ -172,13 +172,6 @@ static int power_saving_thread(void *data) do_sleep = 0; - current_thread_info()->status &= ~TS_POLLING; - /* - * TS_POLLING-cleared state must be visible before we test - * NEED_RESCHED: - */ - smp_mb(); - expire_time = jiffies + HZ * (100 - idle_pct) / 100; while (!need_resched()) { @@ -209,8 +202,6 @@ static int power_saving_thread(void *data) } } - current_thread_info()->status |= TS_POLLING; - /* * current sched_rt has threshold for rt task running time. * When a rt task uses 95% CPU time, the rt thread will be diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c index 5675d9747e87..b1034a9ada4e 100644 --- a/drivers/acpi/processor_driver.c +++ b/drivers/acpi/processor_driver.c @@ -616,7 +616,8 @@ static int __cpuinit acpi_processor_add(struct acpi_device *device) acpi_processor_get_limit_info(pr); - acpi_processor_power_init(pr, device); + if (cpuidle_get_driver() == &acpi_idle_driver) + acpi_processor_power_init(pr, device); pr->cdev = thermal_cooling_device_register("Processor", device, &processor_cooling_ops); @@ -920,9 +921,14 @@ static int __init acpi_processor_init(void) if (!acpi_processor_dir) return -ENOMEM; #endif - result = cpuidle_register_driver(&acpi_idle_driver); - if (result < 0) - goto out_proc; + + if (!cpuidle_register_driver(&acpi_idle_driver)) { + printk(KERN_DEBUG "ACPI: %s registered with cpuidle\n", + acpi_idle_driver.name); + } else { + printk(KERN_DEBUG "ACPI: acpi_idle yielding to %s", + cpuidle_get_driver()->name); + } result = acpi_bus_register_driver(&acpi_processor_driver); if (result < 0) @@ -941,7 +947,6 @@ static int __init acpi_processor_init(void) out_cpuidle: cpuidle_unregister_driver(&acpi_idle_driver); -out_proc: #ifdef CONFIG_ACPI_PROCFS remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); #endif diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c index 13c6cb703f1d..2e8c27d48f2b 100644 --- a/drivers/acpi/processor_idle.c +++ b/drivers/acpi/processor_idle.c @@ -872,6 +872,7 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev, return(acpi_idle_enter_c1(dev, state)); local_irq_disable(); + if (cx->entry_method != ACPI_CSTATE_FFH) { current_thread_info()->status &= ~TS_POLLING; /* @@ -879,12 +880,12 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev, * NEED_RESCHED: */ smp_mb(); - } - if (unlikely(need_resched())) { - current_thread_info()->status |= TS_POLLING; - local_irq_enable(); - return 0; + if (unlikely(need_resched())) { + current_thread_info()->status |= TS_POLLING; + local_irq_enable(); + return 0; + } } /* @@ -911,7 +912,8 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev, sched_clock_idle_wakeup_event(idle_time_ns); local_irq_enable(); - current_thread_info()->status |= TS_POLLING; + if (cx->entry_method != ACPI_CSTATE_FFH) + current_thread_info()->status |= TS_POLLING; cx->usage++; @@ -962,6 +964,7 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev, } local_irq_disable(); + if (cx->entry_method != ACPI_CSTATE_FFH) { current_thread_info()->status &= ~TS_POLLING; /* @@ -969,12 +972,12 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev, * NEED_RESCHED: */ smp_mb(); - } - if (unlikely(need_resched())) { - current_thread_info()->status |= TS_POLLING; - local_irq_enable(); - return 0; + if (unlikely(need_resched())) { + current_thread_info()->status |= TS_POLLING; + local_irq_enable(); + return 0; + } } acpi_unlazy_tlb(smp_processor_id()); @@ -1028,7 +1031,8 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev, sched_clock_idle_wakeup_event(idle_time_ns); local_irq_enable(); - current_thread_info()->status |= TS_POLLING; + if (cx->entry_method != ACPI_CSTATE_FFH) + current_thread_info()->status |= TS_POLLING; cx->usage++; |