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| author | Wei Liu <wei.liu2@citrix.com> | 2013-03-07 16:50:27 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2014-01-06 16:07:35 +0100 |
| commit | 3f70fa828249e3f37883be98f5b4d08e947f55b0 (patch) | |
| tree | 2e4d738d40aea11c302b40a31e121a23c9f6bbcc /drivers/xen | |
| parent | xen/events: remove unnecessary init_evtchn_cpu_bindings() (diff) | |
| download | linux-3f70fa828249e3f37883be98f5b4d08e947f55b0.tar.xz linux-3f70fa828249e3f37883be98f5b4d08e947f55b0.zip | |
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>
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | 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 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); |