--- b/kernel/cpu.c
+++ a/kernel/cpu.c
@@ -2201,8 +2201,6 @@
  */
 void __init boot_cpu_hotplug_init(void)
 {
-#ifdef CONFIG_SMP
 	this_cpu_write(cpuhp_state.booted_once, true);
-#endif
 	this_cpu_write(cpuhp_state.state, CPUHP_ONLINE);
 }