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-rw-r--r--arch/x86/xen/smp.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 501d4e0..02900e8 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -75,8 +75,14 @@ static void __cpuinit cpu_bringup(void)
xen_setup_cpu_clockevents();
+ notify_cpu_starting(cpu);
+
+ ipi_call_lock();
set_cpu_online(cpu, true);
- percpu_write(cpu_state, CPU_ONLINE);
+ ipi_call_unlock();
+
+ this_cpu_write(cpu_state, CPU_ONLINE);
+
wmb();
/* We can take interrupts now: we're officially "up". */
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