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authorAnna-Maria Behnsen2024-02-21 10:05:37 +0100
committerThomas Gleixner2024-02-22 17:52:31 +0100
commit9f6a3c602c235c3cccbe673fb7e1cca30ca4be0d (patch)
tree622ea80787ec5e450047f50da0ab86fd7a4a3fff /kernel/time
parentaf68cb3fc736e13e66fc8202ea94c3aff7299f39 (diff)
timers: Split next timer interrupt logic
Split the logic for getting next timer interrupt (no matter of recalculated or already stored in base->next_expiry) into a separate function named next_timer_interrupt(). Make it available to local call sites only. No functional change. Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Link: https://lore.kernel.org/r/20240221090548.36600-10-anna-maria@linutronix.de
Diffstat (limited to 'kernel/time')
-rw-r--r--kernel/time/timer.c32
1 files changed, 19 insertions, 13 deletions
diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 9c8443d4fe33..748f4b72fb6d 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1996,12 +1996,29 @@ static u64 cmp_next_hrtimer_event(u64 basem, u64 expires)
return DIV_ROUND_UP_ULL(nextevt, TICK_NSEC) * TICK_NSEC;
}
+static unsigned long next_timer_interrupt(struct timer_base *base,
+ unsigned long basej)
+{
+ if (base->next_expiry_recalc)
+ next_expiry_recalc(base);
+
+ /*
+ * Move next_expiry for the empty base into the future to prevent an
+ * unnecessary raise of the timer softirq when the next_expiry value
+ * will be reached even if there is no timer pending.
+ */
+ if (!base->timers_pending)
+ base->next_expiry = basej + NEXT_TIMER_MAX_DELTA;
+
+ return base->next_expiry;
+}
+
static inline u64 __get_next_timer_interrupt(unsigned long basej, u64 basem,
bool *idle)
{
struct timer_base *base = this_cpu_ptr(&timer_bases[BASE_STD]);
- unsigned long nextevt = basej + NEXT_TIMER_MAX_DELTA;
u64 expires = KTIME_MAX;
+ unsigned long nextevt;
/*
* Pretend that there is no timer pending if the cpu is offline.
@@ -2014,24 +2031,13 @@ static inline u64 __get_next_timer_interrupt(unsigned long basej, u64 basem,
}
raw_spin_lock(&base->lock);
- if (base->next_expiry_recalc)
- next_expiry_recalc(base);
+ nextevt = next_timer_interrupt(base, basej);
if (base->timers_pending) {
- nextevt = base->next_expiry;
-
/* If we missed a tick already, force 0 delta */
if (time_before(nextevt, basej))
nextevt = basej;
expires = basem + (u64)(nextevt - basej) * TICK_NSEC;
- } else {
- /*
- * Move next_expiry for the empty base into the future to
- * prevent a unnecessary raise of the timer softirq when the
- * next_expiry value will be reached even if there is no timer
- * pending.
- */
- base->next_expiry = nextevt;
}
/*