The following commit has been merged into the timers/core branch of tip:
Commit-ID: 8c3b5e6ec0fee18bc2ce38d1dfe913413205f908
Gitweb: https://git.kernel.org/tip/8c3b5e6ec0fee18bc2ce38d1dfe913413205f908
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Tue, 13 Jul 2021 15:39:48 +02:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Tue, 10 Aug 2021 17:57:22 +02:00
hrtimer: Ensure timerfd notification for HIGHRES=n
If high resolution timers are disabled the timerfd notification about a
clock was set event is not happening for all cases which use
clock_was_set_delayed() because that's a NOP for HIGHRES=n, which is wrong.
Make clock_was_set_delayed() unconditially available to fix that.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210713135158.196661266@xxxxxxxxxxxxx
---
include/linux/hrtimer.h | 5 -----
kernel/time/hrtimer.c | 32 ++++++++++++++++----------------
kernel/time/tick-internal.h | 3 +++
3 files changed, 19 insertions(+), 21 deletions(-)
diff --git a/include/linux/hrtimer.h b/include/linux/hrtimer.h
index bb5e7b0..77295af 100644
--- a/include/linux/hrtimer.h
+++ b/include/linux/hrtimer.h
@@ -318,16 +318,12 @@ struct clock_event_device;
extern void hrtimer_interrupt(struct clock_event_device *dev);
-extern void clock_was_set_delayed(void);
-
extern unsigned int hrtimer_resolution;
#else
#define hrtimer_resolution (unsigned int)LOW_RES_NSEC
-static inline void clock_was_set_delayed(void) { }
-
#endif
static inline ktime_t
@@ -351,7 +347,6 @@ hrtimer_expires_remaining_adjusted(const struct hrtimer *timer)
timer->base->get_time());
}
-extern void clock_was_set(void);
#ifdef CONFIG_TIMERFD
extern void timerfd_clock_was_set(void);
#else
diff --git a/kernel/time/hrtimer.c b/kernel/time/hrtimer.c
index 5f7c465..7ebf642 100644
--- a/kernel/time/hrtimer.c
+++ b/kernel/time/hrtimer.c
@@ -777,22 +777,6 @@ static void hrtimer_switch_to_hres(void)
retrigger_next_event(NULL);
}
-static void clock_was_set_work(struct work_struct *work)
-{
- clock_was_set();
-}
-
-static DECLARE_WORK(hrtimer_work, clock_was_set_work);
-
-/*
- * Called from timekeeping and resume code to reprogram the hrtimer
- * interrupt device on all cpus.
- */
-void clock_was_set_delayed(void)
-{
- schedule_work(&hrtimer_work);
-}
-
#else
static inline int hrtimer_is_hres_enabled(void) { return 0; }
@@ -877,6 +861,22 @@ void clock_was_set(void)
timerfd_clock_was_set();
}
+static void clock_was_set_work(struct work_struct *work)
+{
+ clock_was_set();
+}
+
+static DECLARE_WORK(hrtimer_work, clock_was_set_work);
+
+/*
+ * Called from timekeeping and resume code to reprogram the hrtimer
+ * interrupt device on all cpus and to notify timerfd.
+ */
+void clock_was_set_delayed(void)
+{
+ schedule_work(&hrtimer_work);
+}
+
/*
* During resume we might have to reprogram the high resolution timer
* interrupt on all online CPUs. However, all other CPUs will be
diff --git a/kernel/time/tick-internal.h b/kernel/time/tick-internal.h
index 6a742a2..cd610fa 100644
--- a/kernel/time/tick-internal.h
+++ b/kernel/time/tick-internal.h
@@ -165,3 +165,6 @@ DECLARE_PER_CPU(struct hrtimer_cpu_base, hrtimer_bases);
extern u64 get_next_timer_interrupt(unsigned long basej, u64 basem);
void timer_clear_idle(void);
+
+void clock_was_set(void);
+void clock_was_set_delayed(void);
|