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This function is only ever called from within the same source module and
really has no business being declared xen/iommu.h. This patch relocates
the function ahead of the first caller and makes it static.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>