cpu_up
int (*cpu_up)(struct mips_cdmm_device *);
BUILD_PERDEV_HELPER(cpu_up) /* int mips_cdmm_cpu_up_helper(...) */
.cpu_up = mips_ejtag_fdc_tty_cpu_up,
return cpu_up(dev->id, CPUHP_ONLINE);
ret = cpu_up(sleep_cpu, CPUHP_ONLINE);
if (cpu_up(cpu, target) && can_rollback_cpu(st)) {
ret = cpu_up(dev->id, target);