clocksource: Replace deprecated CPU-hotplug functions.

[ 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@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210803141621.780504-35-bigeasy@linutronix.de
Stable-dep-of: 6bb05a33337b ("clocksource: Use migrate_disable() to avoid calling get_random_u32() in atomic context")
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 00cf99cb7449644204104d2cd596ee32078c4edd..e44fb1e12a2816ac0b535c14c2a2b6514813636b 100644 (file)
--- 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);