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xen/evtchn: remove spurious barrier

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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>
This commit is contained in:
Jeremy Fitzhardinge 2009-09-18 17:13:41 -07:00
parent 0edce91dcd
commit 1a1a17cddb
1 changed files with 0 additions and 3 deletions
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drivers/xen/evtchn.c
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@ -279,9 +279,6 @@ static void evtchn_unbind_from_user(struct per_user_data *u, int port)
unbind_from_irqhandler(irq, (void *)(unsigned long)port);
/* make sure we unbind the irq handler before clearing the port */
barrier();
set_port_user(port, NULL);
}