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The commita8f8a590e0"libxc: Check xc_domain_maximum_gpfn for negative return values" introduced an regression in tools outside libxc (migrate v2) which wanted the unfiltered GPFN value. Said commit added a wrapper which added +1 if there were no errors. To make it work pre-commita8f8a59we add an xc_domain_nr_gpfns which will add +1 if there are no errors (and change all in-tree callers to use it). The xc_domain_maximum_gpfn will return the unfiltered GPFN value. Suggested-by: Ian Campbell <ian.campbell@citrix.com> Reported-by: Andrew Cooper <andrew.cooper3@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com>