summaryrefslogtreecommitdiffstats
path: root/kernel/time/hrtimer.c
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/time/hrtimer.c')
-rw-r--r--kernel/time/hrtimer.c25
1 files changed, 13 insertions, 12 deletions
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index edb0f821dc..70625dff62 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -38,6 +38,7 @@
#include <linux/sched/deadline.h>
#include <linux/sched/nohz.h>
#include <linux/sched/debug.h>
+#include <linux/sched/isolation.h>
#include <linux/timer.h>
#include <linux/freezer.h>
#include <linux/compat.h>
@@ -746,7 +747,7 @@ static void hrtimer_switch_to_hres(void)
base->hres_active = 1;
hrtimer_resolution = HIGH_RES_NSEC;
- tick_setup_sched_timer();
+ tick_setup_sched_timer(true);
/* "Retrigger" the interrupt to get things going */
retrigger_next_event(NULL);
}
@@ -1021,21 +1022,23 @@ void unlock_hrtimer_base(const struct hrtimer *timer, unsigned long *flags)
}
/**
- * hrtimer_forward - forward the timer expiry
+ * hrtimer_forward() - forward the timer expiry
* @timer: hrtimer to forward
* @now: forward past this time
* @interval: the interval to forward
*
* Forward the timer expiry so it will expire in the future.
- * Returns the number of overruns.
*
- * Can be safely called from the callback function of @timer. If
- * called from other contexts @timer must neither be enqueued nor
- * running the callback and the caller needs to take care of
- * serialization.
+ * .. note::
+ * This only updates the timer expiry value and does not requeue the timer.
*
- * Note: This only updates the timer expiry value and does not requeue
- * the timer.
+ * There is also a variant of the function hrtimer_forward_now().
+ *
+ * Context: Can be safely called from the callback function of @timer. If called
+ * from other contexts @timer must neither be enqueued nor running the
+ * callback and the caller needs to take care of serialization.
+ *
+ * Return: The number of overruns are returned.
*/
u64 hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval)
{
@@ -2223,10 +2226,8 @@ static void migrate_hrtimer_list(struct hrtimer_clock_base *old_base,
int hrtimers_cpu_dying(unsigned int dying_cpu)
{
+ int i, ncpu = cpumask_any_and(cpu_active_mask, housekeeping_cpumask(HK_TYPE_TIMER));
struct hrtimer_cpu_base *old_base, *new_base;
- int i, ncpu = cpumask_first(cpu_active_mask);
-
- tick_cancel_sched_timer(dying_cpu);
old_base = this_cpu_ptr(&hrtimer_bases);
new_base = &per_cpu(hrtimer_bases, ncpu);