1 files changed, 5 insertions, 0 deletions

diff --git a/kernel/cpu.c b/kernel/cpu.c
index f45657f1eb8e..3046a503242c 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -603,6 +603,11 @@ cpu_hotplug_pm_callback(struct notifier_block *nb,
 
 static int __init cpu_hotplug_pm_sync_init(void)
 {
+        /*
+         * cpu_hotplug_pm_callback has higher priority than x86
+         * bsp_pm_callback which depends on cpu_hotplug_pm_callback
+         * to disable cpu hotplug to avoid cpu hotplug race.
+         */
         pm_notifier(cpu_hotplug_pm_callback, 0);
         return 0;
 }