The first_index/last_index parameters in zap_details are actually only used in
unmap_mapping_range_tree(). At the meantime, this function is only called by
unmap_mapping_pages() once. Instead of passing these two variables through the
whole stack of page zapping code, remove them from zap_details and let them
simply be parameters of unmap_mapping_range_tree(), which is inlined.
Reviewed-by: Alistair Popple <apopple@xxxxxxxxxx>
Signed-off-by: Peter Xu <peterx@xxxxxxxxxx>
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