1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 2396b4492f70..4f0f22b020ea 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -586,6 +586,22 @@ static void set_affinity_irq(unsigned irq, cpumask_t dest)
         rebind_irq_to_cpu(irq, tcpu);
 }
 
+int resend_irq_on_evtchn(unsigned int irq)
+{
+        int masked, evtchn = evtchn_from_irq(irq);
+        struct shared_info *s = HYPERVISOR_shared_info;
+
+        if (!VALID_EVTCHN(evtchn))
+                return 1;
+
+        masked = sync_test_and_set_bit(evtchn, s->evtchn_mask);
+        sync_set_bit(evtchn, s->evtchn_pending);
+        if (!masked)
+                unmask_evtchn(evtchn);
+
+        return 1;
+}
+
 static void enable_dynirq(unsigned int irq)
 {
         int evtchn = evtchn_from_irq(irq);