[tip: timers/core] tick/sched: Combine WARN_ON_ONCE and print_once

From: tip-bot2 for Anna-Maria Behnsen
Date: Wed Jul 03 2024 - 15:36:51 EST


The following commit has been merged into the timers/core branch of tip:

Commit-ID: 59dbee7d4d59425658b1d86238732c575216b718
Gitweb: https://git.kernel.org/tip/59dbee7d4d59425658b1d86238732c575216b718
Author: Anna-Maria Behnsen <anna-maria@xxxxxxxxxxxxx>
AuthorDate: Mon, 10 Jun 2024 12:35:52 +02:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Wed, 03 Jul 2024 21:32:55 +02:00

tick/sched: Combine WARN_ON_ONCE and print_once

When the WARN_ON_ONCE() triggers, the printk() of the additional
information related to the warning will not happen in print level
"warn". When reading dmesg with a restriction to level "warn", the
information published by the printk_once() will not show up there.

Transform WARN_ON_ONCE() and printk_once() into a WARN_ONCE().

Signed-off-by: Anna-Maria Behnsen <anna-maria@xxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Frederic Weisbecker <frederic@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240610103552.25252-1-anna-maria@xxxxxxxxxxxxx

---
kernel/time/tick-sched.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c
index 43a6370..753a184 100644
--- a/kernel/time/tick-sched.c
+++ b/kernel/time/tick-sched.c
@@ -1026,10 +1026,10 @@ static void tick_nohz_stop_tick(struct tick_sched *ts, int cpu)
if (expires == KTIME_MAX || ts->next_tick == hrtimer_get_expires(&ts->sched_timer))
return;

- WARN_ON_ONCE(1);
- printk_once("basemono: %llu ts->next_tick: %llu dev->next_event: %llu timer->active: %d timer->expires: %llu\n",
- basemono, ts->next_tick, dev->next_event,
- hrtimer_active(&ts->sched_timer), hrtimer_get_expires(&ts->sched_timer));
+ WARN_ONCE(1, "basemono: %llu ts->next_tick: %llu dev->next_event: %llu "
+ "timer->active: %d timer->expires: %llu\n", basemono, ts->next_tick,
+ dev->next_event, hrtimer_active(&ts->sched_timer),
+ hrtimer_get_expires(&ts->sched_timer));
}

/*