smpboot: Replace deprecated CPU-hotplug functions.

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/20210803141621.780504-34-bigeasy@linutronix.de

diff --git a/kernel/smpboot.c b/kernel/smpboot.c
index cf6acab..f6bc0bc 100644 (file)
--- a/kernel/smpboot.c
+++ b/kernel/smpboot.c
@@ -291,7 +291,7 @@ int smpboot_register_percpu_thread(struct smp_hotplug_thread *plug_thread)
        unsigned int cpu;
        int ret = 0;
 
-       get_online_cpus();
+       cpus_read_lock();
        mutex_lock(&smpboot_threads_lock);
        for_each_online_cpu(cpu) {
                ret = __smpboot_create_thread(plug_thread, cpu);
@@ -304,7 +304,7 @@ int smpboot_register_percpu_thread(struct smp_hotplug_thread *plug_thread)
        list_add(&plug_thread->list, &hotplug_threads);
 out:
        mutex_unlock(&smpboot_threads_lock);
-       put_online_cpus();
+       cpus_read_unlock();
        return ret;
 }
 EXPORT_SYMBOL_GPL(smpboot_register_percpu_thread);
@@ -317,12 +317,12 @@ EXPORT_SYMBOL_GPL(smpboot_register_percpu_thread);
  */
 void smpboot_unregister_percpu_thread(struct smp_hotplug_thread *plug_thread)
 {
-       get_online_cpus();
+       cpus_read_lock();
        mutex_lock(&smpboot_threads_lock);
        list_del(&plug_thread->list);
        smpboot_destroy_threads(plug_thread);
        mutex_unlock(&smpboot_threads_lock);
-       put_online_cpus();
+       cpus_read_unlock();
 }
 EXPORT_SYMBOL_GPL(smpboot_unregister_percpu_thread);