linux-kernel - [PATCH v8 15/25] timer: Split next timer interrupt logic

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Message-Id: <20231004123454.15691-16-anna-maria@linutronix.de>
Date:   Wed,  4 Oct 2023 14:34:44 +0200
From:   Anna-Maria Behnsen <anna-maria@...utronix.de>
To:     linux-kernel@...r.kernel.org
Cc:     Peter Zijlstra <peterz@...radead.org>,
        John Stultz <jstultz@...gle.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Eric Dumazet <edumazet@...gle.com>,
        "Rafael J . Wysocki" <rafael.j.wysocki@...el.com>,
        Arjan van de Ven <arjan@...radead.org>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Frederic Weisbecker <frederic@...nel.org>,
        Rik van Riel <riel@...riel.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Sebastian Siewior <bigeasy@...utronix.de>,
        Giovanni Gherdovich <ggherdovich@...e.cz>,
        Lukasz Luba <lukasz.luba@....com>,
        "Gautham R . Shenoy" <gautham.shenoy@....com>,
        Srinivas Pandruvada <srinivas.pandruvada@...el.com>,
        K Prateek Nayak <kprateek.nayak@....com>,
        Anna-Maria Behnsen <anna-maria@...utronix.de>
Subject: [PATCH v8 15/25] timer: Split next timer interrupt logic

Logic for getting next timer interrupt (no matter of recalculated or
already stored in base->next_expiry) is split into a separate function
"next_timer_interrupt()" to make it available for new call sites.

No functional change.

Signed-off-by: Anna-Maria Behnsen <anna-maria@...utronix.de>
Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
Reviewed-by: Frederic Weisbecker <frederic@...nel.org>
---
 kernel/time/timer.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 1aafa0edc74c..7468a805d302 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1951,14 +1951,20 @@ 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)
+{
+	if (base->next_expiry_recalc)
+		next_expiry_recalc(base);
+
+	return base->next_expiry;
+}
+
 static inline unsigned long __get_next_timer_interrupt(unsigned long basej,
 						       struct timer_base *base)
 {
 	unsigned long nextevt;
 
-	if (base->next_expiry_recalc)
-		next_expiry_recalc(base);
-	nextevt = base->next_expiry;
+	nextevt = next_timer_interrupt(base);
 
 	if (base->timers_pending) {
 		/* If we missed a tick already, force 0 delta */
-- 
2.39.2