diff options
Diffstat (limited to 'drivers/xen')
| -rw-r--r-- | drivers/xen/events/events_2l.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/xen/events/events_2l.c b/drivers/xen/events/events_2l.c index 7dd46312c180..04d1b025b29d 100644 --- a/drivers/xen/events/events_2l.c +++ b/drivers/xen/events/events_2l.c @@ -90,6 +90,8 @@ static void evtchn_2l_unmask(unsigned port) BUG_ON(!irqs_disabled()); + smp_wmb(); /* All writes before unmask must be visible. */ + if (unlikely((cpu != cpu_from_evtchn(port)))) do_hypercall = 1; else { |