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-rw-r--r--arch/arm/kernel/process.c11
-rw-r--r--arch/x86/kernel/process.c12
-rw-r--r--include/linux/clockchips.h12
-rw-r--r--init/main.c2
-rw-r--r--kernel/hrtimer.c6
-rw-r--r--kernel/time/tick-broadcast.c225
-rw-r--r--kernel/time/tick-common.c1
-rw-r--r--kernel/time/tick-internal.h3
-rw-r--r--kernel/time/tick-sched.c4
9 files changed, 214 insertions, 62 deletions
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 047d3e40e47..db4ffd09ee2 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -199,7 +199,16 @@ void cpu_idle(void)
#ifdef CONFIG_PL310_ERRATA_769419
wmb();
#endif
- if (hlt_counter) {
+ /*
+ * In poll mode we reenable interrupts and spin.
+ *
+ * Also if we detected in the wakeup from idle
+ * path that the tick broadcast device expired
+ * for us, we don't want to go deep idle as we
+ * know that the IPI is going to arrive right
+ * away
+ */
+ if (hlt_counter || tick_check_broadcast_expired()) {
local_irq_enable();
cpu_relax();
} else if (!need_resched()) {
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index 14ae10031ff..aa524da03bb 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -336,6 +336,18 @@ void cpu_idle(void)
local_touch_nmi();
local_irq_disable();
+ /*
+ * We detected in the wakeup path that the
+ * tick broadcast device expired for us, but
+ * we raced with the other CPU and came back
+ * here before it was able to fire the IPI.
+ * No point in going idle.
+ */
+ if (tick_check_broadcast_expired()) {
+ local_irq_enable();
+ continue;
+ }
+
enter_idle();
/* Don't trace irqs off for idle */
diff --git a/include/linux/clockchips.h b/include/linux/clockchips.h
index 66346521cb6..464e229e7d8 100644
--- a/include/linux/clockchips.h
+++ b/include/linux/clockchips.h
@@ -55,6 +55,11 @@ enum clock_event_nofitiers {
#define CLOCK_EVT_FEAT_C3STOP 0x000008
#define CLOCK_EVT_FEAT_DUMMY 0x000010
+/*
+ * Core shall set the interrupt affinity dynamically in broadcast mode
+ */
+#define CLOCK_EVT_FEAT_DYNIRQ 0x000020
+
/**
* struct clock_event_device - clock event device descriptor
* @event_handler: Assigned by the framework to be called by the low
@@ -170,6 +175,12 @@ extern void tick_broadcast(const struct cpumask *mask);
extern int tick_receive_broadcast(void);
#endif
+#if defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) && defined(CONFIG_TICK_ONESHOT)
+extern int tick_check_broadcast_expired(void);
+#else
+static inline int tick_check_broadcast_expired(void) { return 0; }
+#endif
+
#ifdef CONFIG_GENERIC_CLOCKEVENTS
extern void clockevents_notify(unsigned long reason, void *arg);
#else
@@ -182,6 +193,7 @@ static inline void clockevents_suspend(void) {}
static inline void clockevents_resume(void) {}
#define clockevents_notify(reason, arg) do { } while (0)
+static inline int tick_check_broadcast_expired(void) { return 0; }
#endif
diff --git a/init/main.c b/init/main.c
index 63534a141b4..b3e06142854 100644
--- a/init/main.c
+++ b/init/main.c
@@ -494,7 +494,6 @@ asmlinkage void __init start_kernel(void)
* Interrupts are still disabled. Do necessary setups, then
* enable them
*/
- tick_init();
boot_cpu_init();
page_address_init();
printk(KERN_NOTICE "%s", linux_banner);
@@ -551,6 +550,7 @@ asmlinkage void __init start_kernel(void)
/* init some links before init_ISA_irqs() */
early_irq_init();
init_IRQ();
+ tick_init();
init_timers();
hrtimers_init();
softirq_init();
diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index 258720741d3..d6830d5ae73 100644
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -1022,7 +1022,8 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
* @timer: the timer to be added
* @tim: expiry time
* @delta_ns: "slack" range for the timer
- * @mode: expiry mode: absolute (HRTIMER_ABS) or relative (HRTIMER_REL)
+ * @mode: expiry mode: absolute (HRTIMER_MODE_ABS) or
+ * relative (HRTIMER_MODE_REL)
*
* Returns:
* 0 on success
@@ -1039,7 +1040,8 @@ EXPORT_SYMBOL_GPL(hrtimer_start_range_ns);
* hrtimer_start - (re)start an hrtimer on the current CPU
* @timer: the timer to be added
* @tim: expiry time
- * @mode: expiry mode: absolute (HRTIMER_ABS) or relative (HRTIMER_REL)
+ * @mode: expiry mode: absolute (HRTIMER_MODE_ABS) or
+ * relative (HRTIMER_MODE_REL)
*
* Returns:
* 0 on success
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index 2fb8cb88df8..d76d816afc5 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -28,9 +28,8 @@
*/
static struct tick_device tick_broadcast_device;
-/* FIXME: Use cpumask_var_t. */
-static DECLARE_BITMAP(tick_broadcast_mask, NR_CPUS);
-static DECLARE_BITMAP(tmpmask, NR_CPUS);
+static cpumask_var_t tick_broadcast_mask;
+static cpumask_var_t tmpmask;
static DEFINE_RAW_SPINLOCK(tick_broadcast_lock);
static int tick_broadcast_force;
@@ -50,7 +49,7 @@ struct tick_device *tick_get_broadcast_device(void)
struct cpumask *tick_get_broadcast_mask(void)
{
- return to_cpumask(tick_broadcast_mask);
+ return tick_broadcast_mask;
}
/*
@@ -74,7 +73,7 @@ int tick_check_broadcast_device(struct clock_event_device *dev)
clockevents_exchange_device(tick_broadcast_device.evtdev, dev);
tick_broadcast_device.evtdev = dev;
- if (!cpumask_empty(tick_get_broadcast_mask()))
+ if (!cpumask_empty(tick_broadcast_mask))
tick_broadcast_start_periodic(dev);
return 1;
}
@@ -123,7 +122,7 @@ int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu)
if (!tick_device_is_functional(dev)) {
dev->event_handler = tick_handle_periodic;
tick_device_setup_broadcast_func(dev);
- cpumask_set_cpu(cpu, tick_get_broadcast_mask());
+ cpumask_set_cpu(cpu, tick_broadcast_mask);
tick_broadcast_start_periodic(tick_broadcast_device.evtdev);
ret = 1;
} else {
@@ -134,7 +133,7 @@ int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu)
*/
if (!(dev->features & CLOCK_EVT_FEAT_C3STOP)) {
int cpu = smp_processor_id();
- cpumask_clear_cpu(cpu, tick_get_broadcast_mask());
+ cpumask_clear_cpu(cpu, tick_broadcast_mask);
tick_broadcast_clear_oneshot(cpu);
} else {
tick_device_setup_broadcast_func(dev);
@@ -198,9 +197,8 @@ static void tick_do_periodic_broadcast(void)
{
raw_spin_lock(&tick_broadcast_lock);
- cpumask_and(to_cpumask(tmpmask),
- cpu_online_mask, tick_get_broadcast_mask());
- tick_do_broadcast(to_cpumask(tmpmask));
+ cpumask_and(tmpmask, cpu_online_mask, tick_broadcast_mask);
+ tick_do_broadcast(tmpmask);
raw_spin_unlock(&tick_broadcast_lock);
}
@@ -263,13 +261,12 @@ static void tick_do_broadcast_on_off(unsigned long *reason)
if (!tick_device_is_functional(dev))
goto out;
- bc_stopped = cpumask_empty(tick_get_broadcast_mask());
+ bc_stopped = cpumask_empty(tick_broadcast_mask);
switch (*reason) {
case CLOCK_EVT_NOTIFY_BROADCAST_ON:
case CLOCK_EVT_NOTIFY_BROADCAST_FORCE:
- if (!cpumask_test_cpu(cpu, tick_get_broadcast_mask())) {
- cpumask_set_cpu(cpu, tick_get_broadcast_mask());
+ if (!cpumask_test_and_set_cpu(cpu, tick_broadcast_mask)) {
if (tick_broadcast_device.mode ==
TICKDEV_MODE_PERIODIC)
clockevents_shutdown(dev);
@@ -279,8 +276,7 @@ static void tick_do_broadcast_on_off(unsigned long *reason)
break;
case CLOCK_EVT_NOTIFY_BROADCAST_OFF:
if (!tick_broadcast_force &&
- cpumask_test_cpu(cpu, tick_get_broadcast_mask())) {
- cpumask_clear_cpu(cpu, tick_get_broadcast_mask());
+ cpumask_test_and_clear_cpu(cpu, tick_broadcast_mask)) {
if (tick_broadcast_device.mode ==
TICKDEV_MODE_PERIODIC)
tick_setup_periodic(dev, 0);
@@ -288,7 +284,7 @@ static void tick_do_broadcast_on_off(unsigned long *reason)
break;
}
- if (cpumask_empty(tick_get_broadcast_mask())) {
+ if (cpumask_empty(tick_broadcast_mask)) {
if (!bc_stopped)
clockevents_shutdown(bc);
} else if (bc_stopped) {
@@ -337,10 +333,10 @@ void tick_shutdown_broadcast(unsigned int *cpup)
raw_spin_lock_irqsave(&tick_broadcast_lock, flags);
bc = tick_broadcast_device.evtdev;
- cpumask_clear_cpu(cpu, tick_get_broadcast_mask());
+ cpumask_clear_cpu(cpu, tick_broadcast_mask);
if (tick_broadcast_device.mode == TICKDEV_MODE_PERIODIC) {
- if (bc && cpumask_empty(tick_get_broadcast_mask()))
+ if (bc && cpumask_empty(tick_broadcast_mask))
clockevents_shutdown(bc);
}
@@ -376,13 +372,13 @@ int tick_resume_broadcast(void)
switch (tick_broadcast_device.mode) {
case TICKDEV_MODE_PERIODIC:
- if (!cpumask_empty(tick_get_broadcast_mask()))
+ if (!cpumask_empty(tick_broadcast_mask))
tick_broadcast_start_periodic(bc);
broadcast = cpumask_test_cpu(smp_processor_id(),
- tick_get_broadcast_mask());
+ tick_broadcast_mask);
break;
case TICKDEV_MODE_ONESHOT:
- if (!cpumask_empty(tick_get_broadcast_mask()))
+ if (!cpumask_empty(tick_broadcast_mask))
broadcast = tick_resume_broadcast_oneshot(bc);
break;
}
@@ -395,25 +391,58 @@ int tick_resume_broadcast(void)
#ifdef CONFIG_TICK_ONESHOT
-/* FIXME: use cpumask_var_t. */
-static DECLARE_BITMAP(tick_broadcast_oneshot_mask, NR_CPUS);
+static cpumask_var_t tick_broadcast_oneshot_mask;
+static cpumask_var_t tick_broadcast_pending_mask;
+static cpumask_var_t tick_broadcast_force_mask;
/*
* Exposed for debugging: see timer_list.c
*/
struct cpumask *tick_get_broadcast_oneshot_mask(void)
{
- return to_cpumask(tick_broadcast_oneshot_mask);
+ return tick_broadcast_oneshot_mask;
}
-static int tick_broadcast_set_event(ktime_t expires, int force)
+/*
+ * Called before going idle with interrupts disabled. Checks whether a
+ * broadcast event from the other core is about to happen. We detected
+ * that in tick_broadcast_oneshot_control(). The callsite can use this
+ * to avoid a deep idle transition as we are about to get the
+ * broadcast IPI right away.
+ */
+int tick_check_broadcast_expired(void)
{
- struct clock_event_device *bc = tick_broadcast_device.evtdev;
+ return cpumask_test_cpu(smp_processor_id(), tick_broadcast_force_mask);
+}
+
+/*
+ * Set broadcast interrupt affinity
+ */
+static void tick_broadcast_set_affinity(struct clock_event_device *bc,
+ const struct cpumask *cpumask)
+{
+ if (!(bc->features & CLOCK_EVT_FEAT_DYNIRQ))
+ return;
+
+ if (cpumask_equal(bc->cpumask, cpumask))
+ return;
+
+ bc->cpumask = cpumask;
+ irq_set_affinity(bc->irq, bc->cpumask);
+}
+
+static int tick_broadcast_set_event(struct clock_event_device *bc, int cpu,
+ ktime_t expires, int force)
+{
+ int ret;
if (bc->mode != CLOCK_EVT_MODE_ONESHOT)
clockevents_set_mode(bc, CLOCK_EVT_MODE_ONESHOT);
- return clockevents_program_event(bc, expires, force);
+ ret = clockevents_program_event(bc, expires, force);
+ if (!ret)
+ tick_broadcast_set_affinity(bc, cpumask_of(cpu));
+ return ret;
}
int tick_resume_broadcast_oneshot(struct clock_event_device *bc)
@@ -428,7 +457,7 @@ int tick_resume_broadcast_oneshot(struct clock_event_device *bc)
*/
void tick_check_oneshot_broadcast(int cpu)
{
- if (cpumask_test_cpu(cpu, to_cpumask(tick_broadcast_oneshot_mask))) {
+ if (cpumask_test_cpu(cpu, tick_broadcast_oneshot_mask)) {
struct tick_device *td = &per_cpu(tick_cpu_device, cpu);
clockevents_set_mode(td->evtdev, CLOCK_EVT_MODE_ONESHOT);
@@ -442,27 +471,39 @@ static void tick_handle_oneshot_broadcast(struct clock_event_device *dev)
{
struct tick_device *td;
ktime_t now, next_event;
- int cpu;
+ int cpu, next_cpu = 0;
raw_spin_lock(&tick_broadcast_lock);
again:
dev->next_event.tv64 = KTIME_MAX;
next_event.tv64 = KTIME_MAX;
- cpumask_clear(to_cpumask(tmpmask));
+ cpumask_clear(tmpmask);
now = ktime_get();
/* Find all expired events */
- for_each_cpu(cpu, tick_get_broadcast_oneshot_mask()) {
+ for_each_cpu(cpu, tick_broadcast_oneshot_mask) {
td = &per_cpu(tick_cpu_device, cpu);
- if (td->evtdev->next_event.tv64 <= now.tv64)
- cpumask_set_cpu(cpu, to_cpumask(tmpmask));
- else if (td->evtdev->next_event.tv64 < next_event.tv64)
+ if (td->evtdev->next_event.tv64 <= now.tv64) {
+ cpumask_set_cpu(cpu, tmpmask);
+ /*
+ * Mark the remote cpu in the pending mask, so
+ * it can avoid reprogramming the cpu local
+ * timer in tick_broadcast_oneshot_control().
+ */
+ cpumask_set_cpu(cpu, tick_broadcast_pending_mask);
+ } else if (td->evtdev->next_event.tv64 < next_event.tv64) {
next_event.tv64 = td->evtdev->next_event.tv64;
+ next_cpu = cpu;
+ }
}
+ /* Take care of enforced broadcast requests */
+ cpumask_or(tmpmask, tmpmask, tick_broadcast_force_mask);
+ cpumask_clear(tick_broadcast_force_mask);
+
/*
* Wakeup the cpus which have an expired event.
*/
- tick_do_broadcast(to_cpumask(tmpmask));
+ tick_do_broadcast(tmpmask);
/*
* Two reasons for reprogram:
@@ -479,7 +520,7 @@ again:
* Rearm the broadcast device. If event expired,
* repeat the above
*/
- if (tick_broadcast_set_event(next_event, 0))
+ if (tick_broadcast_set_event(dev, next_cpu, next_event, 0))
goto again;
}
raw_spin_unlock(&tick_broadcast_lock);
@@ -494,6 +535,7 @@ void tick_broadcast_oneshot_control(unsigned long reason)
struct clock_event_device *bc, *dev;
struct tick_device *td;
unsigned long flags;
+ ktime_t now;
int cpu;
/*
@@ -518,21 +560,84 @@ void tick_broadcast_oneshot_control(unsigned long reason)
raw_spin_lock_irqsave(&tick_broadcast_lock, flags);
if (reason == CLOCK_EVT_NOTIFY_BROADCAST_ENTER) {
- if (!cpumask_test_cpu(cpu, tick_get_broadcast_oneshot_mask())) {
- cpumask_set_cpu(cpu, tick_get_broadcast_oneshot_mask());
+ WARN_ON_ONCE(cpumask_test_cpu(cpu, tick_broadcast_pending_mask));
+ if (!cpumask_test_and_set_cpu(cpu, tick_broadcast_oneshot_mask)) {
clockevents_set_mode(dev, CLOCK_EVT_MODE_SHUTDOWN);
- if (dev->next_event.tv64 < bc->next_event.tv64)
- tick_broadcast_set_event(dev->next_event, 1);
+ /*
+ * We only reprogram the broadcast timer if we
+ * did not mark ourself in the force mask and
+ * if the cpu local event is earlier than the
+ * broadcast event. If the current CPU is in
+ * the force mask, then we are going to be
+ * woken by the IPI right away.
+ */
+ if (!cpumask_test_cpu(cpu, tick_broadcast_force_mask) &&
+ dev->next_event.tv64 < bc->next_event.tv64)
+ tick_broadcast_set_event(bc, cpu, dev->next_event, 1);
}
} else {
- if (cpumask_test_cpu(cpu, tick_get_broadcast_oneshot_mask())) {
- cpumask_clear_cpu(cpu,
- tick_get_broadcast_oneshot_mask());
+ if (cpumask_test_and_clear_cpu(cpu, tick_broadcast_oneshot_mask)) {
clockevents_set_mode(dev, CLOCK_EVT_MODE_ONESHOT);
- if (dev->next_event.tv64 != KTIME_MAX)
- tick_program_event(dev->next_event, 1);
+ if (dev->next_event.tv64 == KTIME_MAX)
+ goto out;
+ /*
+ * The cpu which was handling the broadcast
+ * timer marked this cpu in the broadcast
+ * pending mask and fired the broadcast
+ * IPI. So we are going to handle the expired
+ * event anyway via the broadcast IPI
+ * handler. No need to reprogram the timer
+ * with an already expired event.
+ */
+ if (cpumask_test_and_clear_cpu(cpu,
+ tick_broadcast_pending_mask))
+ goto out;
+
+ /*
+ * If the pending bit is not set, then we are
+ * either the CPU handling the broadcast
+ * interrupt or we got woken by something else.
+ *
+ * We are not longer in the broadcast mask, so
+ * if the cpu local expiry time is already
+ * reached, we would reprogram the cpu local
+ * timer with an already expired event.
+ *
+ * This can lead to a ping-pong when we return
+ * to idle and therefor rearm the broadcast
+ * timer before the cpu local timer was able
+ * to fire. This happens because the forced
+ * reprogramming makes sure that the event
+ * will happen in the future and depending on
+ * the min_delta setting this might be far
+ * enough out that the ping-pong starts.
+ *
+ * If the cpu local next_event has expired
+ * then we know that the broadcast timer
+ * next_event has expired as well and
+ * broadcast is about to be handled. So we
+ * avoid reprogramming and enforce that the
+ * broadcast handler, which did not run yet,
+ * will invoke the cpu local handler.
+ *
+ * We cannot call the handler directly from
+ * here, because we might be in a NOHZ phase
+ * and we did not go through the irq_enter()
+ * nohz fixups.
+ */
+ now = ktime_get();
+ if (dev->next_event.tv64 <= now.tv64) {
+ cpumask_set_cpu(cpu, tick_broadcast_force_mask);
+ goto out;
+ }
+ /*
+ * We got woken by something else. Reprogram
+ * the cpu local timer device.
+ */
+ tick_program_event(dev->next_event, 1);
}
}
+out:
raw_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
}
@@ -543,7 +648,7 @@ void tick_broadcast_oneshot_control(unsigned long reason)
*/
static void tick_broadcast_clear_oneshot(int cpu)
{
- cpumask_clear_cpu(cpu, tick_get_broadcast_oneshot_mask());
+ cpumask_clear_cpu(cpu, tick_broadcast_oneshot_mask);
}
static void tick_broadcast_init_next_event(struct cpumask *mask,
@@ -581,17 +686,16 @@ void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
* oneshot_mask bits for those and program the
* broadcast device to fire.
*/
- cpumask_copy(to_cpumask(tmpmask), tick_get_broadcast_mask());
- cpumask_clear_cpu(cpu, to_cpumask(tmpmask));
- cpumask_or(tick_get_broadcast_oneshot_mask(),
- tick_get_broadcast_oneshot_mask(),
- to_cpumask(tmpmask));
+ cpumask_copy(tmpmask, tick_broadcast_mask);
+ cpumask_clear_cpu(cpu, tmpmask);
+ cpumask_or(tick_broadcast_oneshot_mask,
+ tick_broadcast_oneshot_mask, tmpmask);
- if (was_periodic && !cpumask_empty(to_cpumask(tmpmask))) {
+ if (was_periodic && !cpumask_empty(tmpmask)) {
clockevents_set_mode(bc, CLOCK_EVT_MODE_ONESHOT);
- tick_broadcast_init_next_event(to_cpumask(tmpmask),
+ tick_broadcast_init_next_event(tmpmask,
tick_next_period);
- tick_broadcast_set_event(tick_next_period, 1);
+ tick_broadcast_set_event(bc, cpu, tick_next_period, 1);
} else
bc->next_event.tv64 = KTIME_MAX;
} else {
@@ -639,7 +743,7 @@ void tick_shutdown_broadcast_oneshot(unsigned int *cpup)
* Clear the broadcast mask flag for the dead cpu, but do not
* stop the broadcast device!
*/
- cpumask_clear_cpu(cpu, tick_get_broadcast_oneshot_mask());
+ cpumask_clear_cpu(cpu, tick_broadcast_oneshot_mask);
raw_spin_unlock_irqrestore(&tick_broadcast_lock, flags);
}
@@ -663,3 +767,14 @@ bool tick_broadcast_oneshot_available(void)
}
#endif
+
+void __init tick_broadcast_init(void)
+{
+ alloc_cpumask_var(&tick_broadcast_mask, GFP_NOWAIT);
+ alloc_cpumask_var(&tmpmask, GFP_NOWAIT);
+#ifdef CONFIG_TICK_ONESHOT
+ alloc_cpumask_var(&tick_broadcast_oneshot_mask, GFP_NOWAIT);
+ alloc_cpumask_var(&tick_broadcast_pending_mask, GFP_NOWAIT);
+ alloc_cpumask_var(&tick_broadcast_force_mask, GFP_NOWAIT);
+#endif
+}
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index b1600a6973f..74413e396ac 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -416,4 +416,5 @@ static struct notifier_block tick_notifier = {
void __init tick_init(void)
{
clockevents_register_notifier(&tick_notifier);
+ tick_broadcast_init();
}
diff --git a/kernel/time/tick-internal.h b/kernel/time/tick-internal.h
index f5c9207967c..f0299eae460 100644
--- a/kernel/time/tick-internal.h
+++ b/kernel/time/tick-internal.h
@@ -96,7 +96,7 @@ extern void tick_broadcast_on_off(unsigned long reason, int *oncpu);
extern void tick_shutdown_broadcast(unsigned int *cpup);
extern void tick_suspend_broadcast(void);
extern int tick_resume_broadcast(void);
-
+extern void tick_broadcast_init(void);
extern void
tick_set_periodic_handler(struct clock_event_device *dev, int broadcast);
@@ -121,6 +121,7 @@ static inline void tick_broadcast_on_off(unsigned long reason, int *oncpu) { }
static inline void tick_shutdown_broadcast(unsigned int *cpup) { }
static inline void tick_suspend_broadcast(void) { }
static inline int tick_resume_broadcast(void) { return 0; }
+static inline void tick_broadcast_init(void) { }
/*
* Set the periodic handler in non broadcast mode
diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index a19a39952c1..225f8bf1909 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -482,8 +482,8 @@ static bool can_stop_idle_tick(int cpu, struct tick_sched *ts)
if (ratelimit < 10 &&
(local_softirq_pending() & SOFTIRQ_STOP_IDLE_MASK)) {
- printk(KERN_ERR "NOHZ: local_softirq_pending %02x\n",
- (unsigned int) local_softirq_pending());
+ pr_warn("NOHZ: local_softirq_pending %02x\n",
+ (unsigned int) local_softirq_pending());
ratelimit++;
}
return false;
generated by cgit v1.2.3-70-g09d2 (git 2.51.2) at 2025-11-04 13:21:48 +0000