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authorThomas Gleixner <tglx@linutronix.de>2014-08-29 14:00:16 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-09-01 13:48:59 +0200
commit9ce7a25849e80cfb264f4995f832b932c1987e1a (patch)
treec7f7301049b93dda90c16b1e8b09e29cdb0bc189 /include/linux/interrupt.h
parentb76f16748fa61801b1a1fd3ffb6f25ee228a35e0 (diff)
genirq: Simplify wakeup mechanism
Currently we suspend wakeup interrupts by lazy disabling them and check later whether the interrupt has fired, but that's not sufficient for suspend to idle as there is no way to check that once we transitioned into the CPU idle state. So we change the mechanism in the following way: 1) Leave the wakeup interrupts enabled across suspend 2) Add a check to irq_may_run() which is called at the beginning of each flow handler whether the interrupt is an armed wakeup source. This check is basically free as it just extends the existing check for IRQD_IRQ_INPROGRESS. So no new conditional in the hot path. If the IRQD_WAKEUP_ARMED flag is set, then the interrupt is disabled, marked as pending/suspended and the pm core is notified about the wakeup event. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> [ rjw: syscore.c and put irq_pm_check_wakeup() into pm.c ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux/interrupt.h')
-rw-r--r--include/linux/interrupt.h5
1 files changed, 0 insertions, 5 deletions
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 698ad053d064..69517a24bc50 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -193,11 +193,6 @@ extern void irq_wake_thread(unsigned int irq, void *dev_id);
/* The following three functions are for the core kernel use only. */
extern void suspend_device_irqs(void);
extern void resume_device_irqs(void);
-#ifdef CONFIG_PM_SLEEP
-extern int check_wakeup_irqs(void);
-#else
-static inline int check_wakeup_irqs(void) { return 0; }
-#endif
/**
* struct irq_affinity_notify - context for notification of IRQ affinity changes