From 1a1a17cddbfb1f81222b3f18ee8530c41fbc3b82 Mon Sep 17 00:00:00 2001
From: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Date: Fri, 18 Sep 2009 17:13:41 -0700
Subject: [PATCH] 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>
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