[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 03/13] xen/events: introduce test_and_set_mask
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 | 11 ++++++++--- 1 files changed, 8 insertions(+), 3 deletions(-) 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 @@ 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); -- 1.7.2.5 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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