[PATCH 5.10 275/462] clocksource: Replace deprecated CPU-hotplug functions.

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5.10-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>

[ Upstream commit 698429f9d0e54ce3964151adff886ee5fc59714b ]

The functions get_online_cpus() and put_online_cpus() have been
deprecated during the CPU hotplug rework. They map directly to
cpus_read_lock() and cpus_read_unlock().

Replace deprecated CPU-hotplug functions with the official version.
The behavior remains unchanged.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210803141621.780504-35-bigeasy@xxxxxxxxxxxxx
Stable-dep-of: 6bb05a33337b ("clocksource: Use migrate_disable() to avoid calling get_random_u32() in atomic context")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 kernel/time/clocksource.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 00cf99cb74496..e44fb1e12a281 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -335,12 +335,12 @@ static void clocksource_verify_percpu(struct clocksource *cs)
 		return;
 	cpumask_clear(&cpus_ahead);
 	cpumask_clear(&cpus_behind);
-	get_online_cpus();
+	cpus_read_lock();
 	preempt_disable();
 	clocksource_verify_choose_cpus();
 	if (cpumask_weight(&cpus_chosen) == 0) {
 		preempt_enable();
-		put_online_cpus();
+		cpus_read_unlock();
 		pr_warn("Not enough CPUs to check clocksource '%s'.\n", cs->name);
 		return;
 	}
@@ -366,7 +366,7 @@ static void clocksource_verify_percpu(struct clocksource *cs)
 			cs_nsec_min = cs_nsec;
 	}
 	preempt_enable();
-	put_online_cpus();
+	cpus_read_unlock();
 	if (!cpumask_empty(&cpus_ahead))
 		pr_warn("        CPUs %*pbl ahead of CPU %d for clocksource %s.\n",
 			cpumask_pr_args(&cpus_ahead), testcpu, cs->name);
-- 
2.39.5







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