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kvm_set_one_reg() returns a negative errno on failure, use that instead of errno. Also propagate it to callers so they can use it to check for failures and hopefully get rid of their local_err boilerplate. Signed-off-by: Greg Kurz <groug@kaod.org> Message-Id: <159707846665.1489912.14267225652103441921.stgit@bahia.lan> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>