cpu_bootable
int (*cpu_bootable)(unsigned int nr);
(smp_ops->cpu_bootable && !smp_ops->cpu_bootable(cpu)))
.cpu_bootable = smp_generic_cpu_bootable,
.cpu_bootable = pnv_cpu_bootable,
.cpu_bootable = smp_generic_cpu_bootable,
if (!cpu_bootable(cpu)) {
if (!cpu_bootable(cpu))