GNTTABOP_map_grant_ref
ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref,
if (HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, batch, count))
gnttab_retry_eagain_gop(GNTTABOP_map_grant_ref, op,
ret = HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, map_ops, count);
gnttab_retry_eagain_gop(GNTTABOP_map_grant_ref,