cpu hotplug: Add the missed rcu init for new added CPU

Signed-off-by: Jiang, Yunhong <yunhong.jiang@intel.com>

diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c
index 5118da3d47ebd63bea64d8e4024de1ef03178444..7e9473f2671f14d11dcb4421c23bb74a99c090b6 100644 (file)
--- a/xen/arch/x86/smpboot.c
+++ b/xen/arch/x86/smpboot.c
@@ -1391,6 +1391,8 @@ int cpu_up(unsigned int cpu)
                goto out;
        }
 
+       rcu_online_cpu(cpu);
+
        err = __cpu_up(cpu);
        if (err < 0)
                goto out;