[Xen-devel] [PATCH 04/12] xen/events: introduce test_and_set_mask

[David Vrabel <david.vrabel@xxxxxxxxxx>]

From: Wei Liu <wei.liu2@xxxxxxxxxx>

Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx>
Signed-off-by: David Vrabel <david.vrabel@xxxxxxxxxx>
---
 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 0d5c210..88d91d7 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
@@ -1488,7 +1494,7 @@ 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


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