From 3f70fa828249e3f37883be98f5b4d08e947f55b0 Mon Sep 17 00:00:00 2001
From: Wei Liu <wei.liu2@citrix.com>
Date: Thu, 7 Mar 2013 15:50:27 +0000
Subject: [PATCH] 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>
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