Commits
Jeremy Fitzhardinge committed 1a1a17cddbf
xen/evtchn: remove spurious barrier evtchn_unbind_from_user() is called under a lock, so there's no need to worry about the ordering of unbind_from_irqhandler vs clearing the port per-user data. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>