linux-kernel - [PATCH 2/2] clocksource: Use cpumask_next_wrap() in clocksource

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Message-ID: <20250614155031.340988-3-yury.norov@gmail.com>
Date: Sat, 14 Jun 2025 11:50:30 -0400
From: Yury Norov <yury.norov@...il.com>
To: Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org,
	John Stultz <jstultz@...gle.com>,
	Stephen Boyd <sboyd@...nel.org>
Cc: "Yury Norov [NVIDIA]" <yury.norov@...il.com>
Subject: [PATCH 2/2] clocksource: Use cpumask_next_wrap() in clocksource_watchdog()

From: "Yury Norov [NVIDIA]" <yury.norov@...il.com>

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

Acked-by: John Stultz <jstultz@...gle.com>
Signed-off-by: Yury Norov [NVIDIA] <yury.norov@...il.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 a2f2e9f4d37b..e400fe150f9d 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
-- 
2.43.0