[PATCH 03/12] xen/events: introduce test_and_set_mask

[David Vrabel <david.vrabel@citrix.com>]

From: Wei Liu <wei.liu2@citrix.com>

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
---
 drivers/xen/events.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index af61813..057a033 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -351,6 +351,12 @@ static inline int test_evtchn(int port)
 	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
@@ -1519,7 +1525,7 @@ static int retrigger_evtchn(int evtchn)
 	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);
-- 
1.7.2.5