tl_smt_mask
powerpc_topology[i++] = SDTL_INIT(tl_smt_mask, powerpc_smt_flags, SMT);
SDTL_INIT(tl_smt_mask, cpu_smt_flags, SMT),
SDTL_INIT(tl_smt_mask, cpu_smt_flags, SMT),
extern const struct cpumask *tl_smt_mask(struct sched_domain_topology_level *tl, int cpu);
SDTL_INIT(tl_smt_mask, cpu_smt_flags, SMT),