xen_mc_extend_args
mcs = xen_mc_extend_args(__HYPERVISOR_mmu_update, sizeof(*u));
mcs = xen_mc_extend_args(__HYPERVISOR_mmuext_op, sizeof(*u));
struct multicall_space xen_mc_extend_args(unsigned long op, size_t arg_size);
TRACE_EVENT(xen_mc_extend_args,
TP_PROTO(unsigned long op, size_t args, enum xen_mc_extend_args res),
__field(enum xen_mc_extend_args, res)