smp_store_cpu_info(cpu);
set_dec(tb_ticks_per_jiffy);
preempt_disable();
- cpu_callin_map[cpu] = 1;
if (smp_ops->setup_cpu)
smp_ops->setup_cpu(cpu);
notify_cpu_starting(cpu);
set_cpu_online(cpu, true);
+ /*
+ * CPU must be marked active and online before we signal back to the
+ * master, because the scheduler needs to see the cpu_online and
+ * cpu_active bits set.
+ */
+ smp_wmb();
+ cpu_callin_map[cpu] = 1;
+
local_irq_enable();
cpu_startup_entry(CPUHP_ONLINE);