xen/x86: Don't BUG on CPU0 offlining

CONFIG_BOOTPARAM_HOTPLUG_CPU0 allows to offline CPU0 but Xen HVM guests
BUG() in xen_teardown_timer(). Remove the BUG_ON(), this is probably a
leftover from ancient times when CPU0 hotplug was impossible, it works
just fine for HVM.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Acked-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>

diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index a1895a8e85c15753d4781c3ac72185b4c96a7d9d..1ecb05db363203ec004f0e3c6764ca5f448fbc78 100644 (file)
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -309,7 +309,6 @@ static irqreturn_t xen_timer_interrupt(int irq, void *dev_id)
 void xen_teardown_timer(int cpu)
 {
        struct clock_event_device *evt;
-       BUG_ON(cpu == 0);
        evt = &per_cpu(xen_clock_events, cpu).evt;
 
        if (evt->irq >= 0) {