From 3f70fa828249e3f37883be98f5b4d08e947f55b0 Mon Sep 17 00:00:00 2001 From: Wei Liu Date: Thu, 7 Mar 2013 15:50:27 +0000 Subject: [PATCH] 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 Signed-off-by: David Vrabel Reviewed-by: Konrad Rzeszutek Wilk Reviewed-by: Boris Ostrovsky --- drivers/xen/events.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/drivers/xen/events.c b/drivers/xen/events.c index 1e2c74bcd0c8..359e983d97e4 100644 --- a/drivers/xen/events.c +++ b/drivers/xen/events.c @@ -352,6 +352,12 @@ 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 @@ -1493,7 +1499,6 @@ void rebind_evtchn_irq(int evtchn, int irq) /* 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 @@ static int rebind_irq_to_cpu(unsigned irq, unsigned tcpu) * 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 @@ 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); -- 2.11.0