linux-kernel - [PATCH v9 14/32] timers: Split out get next timer interrupt

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Message-Id: <20231201092654.34614-15-anna-maria@linutronix.de>
Date:   Fri,  1 Dec 2023 10:26:36 +0100
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 v9 14/32] timers: Split out get next timer interrupt

Split out get_next_timer_interrupt() to be able to extend it and make it
reusable for other call sites.

No functional change.

Signed-off-by: Anna-Maria Behnsen <anna-maria@...utronix.de>
---
v9: Move whole get_next_timer_interrupt() into a separate function instead
    of splitting the bits and pieces.
---
 kernel/time/timer.c | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/kernel/time/timer.c b/kernel/time/timer.c
index 9d377ebb7395..c9f7f86e95fd 100644
--- a/kernel/time/timer.c
+++ b/kernel/time/timer.c
@@ -1911,15 +1911,7 @@ static u64 cmp_next_hrtimer_event(u64 basem, u64 expires)
 	return DIV_ROUND_UP_ULL(nextevt, TICK_NSEC) * TICK_NSEC;
 }
 
-/**
- * get_next_timer_interrupt - return the time (clock mono) of the next timer
- * @basej:	base time jiffies
- * @basem:	base time clock monotonic
- *
- * Returns the tick aligned clock monotonic time of the next pending
- * timer or KTIME_MAX if no timer is pending.
- */
-u64 get_next_timer_interrupt(unsigned long basej, u64 basem)
+static inline u64 __get_next_timer_interrupt(unsigned long basej, u64 basem)
 {
 	struct timer_base *base = this_cpu_ptr(&timer_bases[BASE_STD]);
 	unsigned long nextevt = basej + NEXT_TIMER_MAX_DELTA;
@@ -1975,6 +1967,19 @@ u64 get_next_timer_interrupt(unsigned long basej, u64 basem)
 	return cmp_next_hrtimer_event(basem, expires);
 }
 
+/**
+ * get_next_timer_interrupt() - return the time (clock mono) of the next timer
+ * @basej:	base time jiffies
+ * @basem:	base time clock monotonic
+ *
+ * Returns the tick aligned clock monotonic time of the next pending
+ * timer or KTIME_MAX if no timer is pending.
+ */
+u64 get_next_timer_interrupt(unsigned long basej, u64 basem)
+{
+	return __get_next_timer_interrupt(basej, basem);
+}
+
 /**
  * timer_clear_idle - Clear the idle state of the timer base
  *
-- 
2.39.2