Add virt_ barriers to list of barriers to check for
presence of a comment.
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
Acked-by: NJulian Calaby <julian.calaby@gmail.com>
Acked-by: NJoe Perches <joe@perches.com>
Acked-by: NPeter Zijlstra (Intel) <peterz@infradead.org>