xen/events: introduce test_and_set_mask()
In preparation for adding event channel port ops, add
test_and_set_mask().
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 1e2c74b..359e983 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -352,6 +352,12 @@
return sync_test_bit(port, BM(&s->evtchn_pending[0]));
}
+static inline int test_and_set_mask(int port)
+{
+ struct shared_info *s = HYPERVISOR_shared_info;
+ return sync_test_and_set_bit(port, BM(&s->evtchn_mask[0]));
+}
+
/**
* notify_remote_via_irq - send event to remote end of event channel via irq
@@ -1493,7 +1499,6 @@
/* Rebind an evtchn so that it gets delivered to a specific cpu */
static int rebind_irq_to_cpu(unsigned irq, unsigned tcpu)
{
- struct shared_info *s = HYPERVISOR_shared_info;
struct evtchn_bind_vcpu bind_vcpu;
int evtchn = evtchn_from_irq(irq);
int masked;
@@ -1516,7 +1521,7 @@
* Mask the event while changing the VCPU binding to prevent
* it being delivered on an unexpected VCPU.
*/
- masked = sync_test_and_set_bit(evtchn, BM(s->evtchn_mask));
+ masked = test_and_set_mask(evtchn);
/*
* If this fails, it usually just indicates that we're dealing with a
@@ -1548,7 +1553,7 @@
if (!VALID_EVTCHN(evtchn))
return 0;
- masked = sync_test_and_set_bit(evtchn, BM(s->evtchn_mask));
+ masked = test_and_set_mask(evtchn);
sync_set_bit(evtchn, BM(s->evtchn_pending));
if (!masked)
unmask_evtchn(evtchn);