linux-kernel - [tip: timers/core] clocksource: Use cpumask_next_wrap() in clocksource

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Message-ID: <174992496575.406.1572877544071692301.tip-bot2@tip-bot2>
Date: Sat, 14 Jun 2025 18:16:05 -0000
From: "tip-bot2 for Yury Norov [NVIDIA]" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: "Yury Norov [NVIDIA]" <yury.norov@...il.com>,
 Thomas Gleixner <tglx@...utronix.de>, John Stultz <jstultz@...gle.com>,
 x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [tip: timers/core] clocksource: Use cpumask_next_wrap() in
 clocksource_watchdog()

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

Commit-ID:     bfa788dc2ddaea7d7930f63a5c7c8f3668a3f2c5
Gitweb:        https://git.kernel.org/tip/bfa788dc2ddaea7d7930f63a5c7c8f3668a3f2c5
Author:        Yury Norov [NVIDIA] <yury.norov@...il.com>
AuthorDate:    Sat, 14 Jun 2025 11:50:30 -04:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Sat, 14 Jun 2025 20:09:44 +02:00

clocksource: Use cpumask_next_wrap() in clocksource_watchdog()

cpumask_next_wrap() is more verbose and efficient comparing to
cpumask_next() followed by cpumask_first().

Signed-off-by: Yury Norov [NVIDIA] <yury.norov@...il.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Acked-by: John Stultz <jstultz@...gle.com>
Link: https://lore.kernel.org/all/20250614155031.340988-3-yury.norov@gmail.com

---
 kernel/time/clocksource.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index a2f2e9f..e400fe1 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -587,9 +587,7 @@ static void clocksource_watchdog(struct timer_list *unused)
 	 * Cycle through CPUs to check if the CPUs stay synchronized
 	 * to each other.
 	 */
-	next_cpu = cpumask_next(raw_smp_processor_id(), cpu_online_mask);
-	if (next_cpu >= nr_cpu_ids)
-		next_cpu = cpumask_first(cpu_online_mask);
+	next_cpu = cpumask_next_wrap(raw_smp_processor_id(), cpu_online_mask);
 
 	/*
 	 * Arm timer if not already pending: could race with concurrent