xen: restore runstate_info even if !have_vcpu_info_placement

Even if have_vcpu_info_placement is not set, we still need to set up
the runstate area on each resumed vcpu.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: Stable Kernel <stable@kernel.org>

arch/x86/xen/enlighten.c

@@ -138,7 +138,6 @@ static void xen_vcpu_setup(int cpu)
  */
 void xen_vcpu_restore(void)
 {
-	if (have_vcpu_info_placement) {
 	int cpu;
 
 	for_each_online_cpu(cpu) {
@@ -150,15 +149,13 @@ void xen_vcpu_restore(void)
 
 		xen_setup_runstate_info(cpu);
 
+		if (have_vcpu_info_placement)
 			xen_vcpu_setup(cpu);
 
 		if (other_cpu &&
 		    HYPERVISOR_vcpu_op(VCPUOP_up, cpu, NULL))
 			BUG();
 	}
-
-		BUG_ON(!have_vcpu_info_placement);
-	}
 }
 
 static void __init xen_banner(void)