linux-master/kernel/cpu.c

177 	int ret, cnt;
194 		ret = cb(cpu);
195 		trace_cpuhp_exit(cpu, st->state, state, ret);
196 		return ret;
204 		ret = cbm(cpu, node);
205 		trace_cpuhp_exit(cpu, st->state, state, ret);
206 		return ret;
216 		ret = cbm(cpu, node);
217 		trace_cpuhp_exit(cpu, st->state, state, ret);
218 		if (ret) {
223 			return ret;
234 		return ret;
241 		ret = cbm(cpu, node);
242 		trace_cpuhp_exit(cpu, st->state, state, ret);
246 		WARN_ON_ONCE(ret);
248 	return ret;
438 	int ret = 0;
445 		ret = -EIO;
450 	return ret;
770 	int ret;
774 	if ((ret = st->result)) {
779 	return ret;
818 	int ret;
827 	ret = cpuhp_bp_sync_alive(cpu);
828 	if (ret)
831 	ret = bringup_wait_for_ap_online(cpu);
832 	if (ret)
844 	return ret;
851 	int ret;
867 	ret = __cpu_up(cpu, idle);
868 	if (ret)
871 	ret = cpuhp_bp_sync_alive(cpu);
872 	if (ret)
875 	ret = bringup_wait_for_ap_online(cpu);
876 	if (ret)
888 	return ret;
950 	int ret = 0;
964 			ret = -1;
966 			ret = err;
971 	return ret;
1008 	int ret = 0;
1010 	ret = cpuhp_invoke_callback_range(true, cpu, st, target);
1011 	if (ret) {
1013 			 ret, cpu, cpuhp_get_step(st->state)->name,
1021 	return ret;
1119 	int ret;
1150 	if ((ret = st->result) && st->last) {
1162 	return ret;
1169 	int ret;
1178 	ret = cpuhp_kick_ap(cpu, st, st->target);
1179 	trace_cpuhp_exit(cpu, st->state, prev_state, ret);
1181 	return ret;
1416 	int ret = 0;
1418 	ret = cpuhp_invoke_callback_range(false, cpu, st, target);
1419 	if (ret) {
1421 			 ret, cpu, cpuhp_get_step(st->state)->name,
1431 	return ret;
1439 	int prev_state, ret = 0;
1458 		ret = cpuhp_kick_ap_work(cpu);
1463 		if (ret)
1479 	ret = cpuhp_down_callbacks(cpu, st, target);
1480 	if (ret && st->state < prev_state) {
1498 	return ret;
1566 	int ret;
1569 	ret = device_offline(get_cpu_device(cpu));
1572 	return ret;
1673 	int ret = 0;
1678 		ret = -EINVAL;
1693 			ret = PTR_ERR(idle);
1712 		ret = cpuhp_kick_ap_work(cpu);
1717 		if (ret)
1727 	ret = cpuhp_up_callbacks(cpu, st, target);
1732 	return ret;
1783 	int ret;
1786 	ret = device_online(get_cpu_device(cpu));
1789 	return ret;
1805 	int ret;
1809 		ret = cpu_up(sleep_cpu, CPUHP_ONLINE);
1810 		if (ret) {
1812 			return ret;
2335 	int ret = 0;
2348 		ret = cpuhp_reserve_state(state);
2349 		if (ret < 0)
2350 			return ret;
2351 		state = ret;
2362 	return ret;
2378 	int ret;
2392 		ret = cpuhp_invoke_ap_callback(cpu, state, bringup, node);
2394 		ret = cpuhp_invoke_callback(cpu, state, bringup, node, NULL);
2396 	ret = cpuhp_invoke_callback(cpu, state, bringup, node, NULL);
2398 	BUG_ON(ret && !bringup);
2399 	return ret;
2432 	int ret;
2456 		ret = cpuhp_issue_call(cpu, state, true, node);
2457 		if (ret) {
2464 	ret = 0;
2468 	return ret;
2474 	int ret;
2477 	ret = __cpuhp_state_add_instance_cpuslocked(state, node, invoke);
2479 	return ret;
2507 	int cpu, ret = 0;
2517 	ret = cpuhp_store_callbacks(state, name, startup, teardown,
2521 	if (ret > 0 && dynstate) {
2522 		state = ret;
2523 		ret = 0;
2526 	if (ret || !invoke || !startup)
2540 		ret = cpuhp_issue_call(cpu, state, true, NULL);
2541 		if (ret) {
2554 	if (!ret && dynstate)
2556 	return ret;
2566 	int ret;
2569 	ret = __cpuhp_setup_state_cpuslocked(state, name, invoke, startup,
2572 	return ret;
2691 	int cpu, ret = 0;
2703 		ret = cpu_down_maps_locked(cpu, CPUHP_OFFLINE);
2704 		if (ret)
2721 	if (!ret)
2724 	return ret;
2729 	int cpu, ret = 0;
2739 		ret = _cpu_up(cpu, 0, CPUHP_ONLINE);
2740 		if (ret)
2746 	return ret;
2765 	int target, ret;
2767 	ret = kstrtoint(buf, 10, &target);
2768 	if (ret)
2769 		return ret;
2779 	ret = lock_device_hotplug_sysfs();
2780 	if (ret)
2781 		return ret;
2785 	ret = !sp->name || sp->cant_stop ? -EINVAL : 0;
2787 	if (ret)
2791 		ret = cpu_up(dev->id, target);
2793 		ret = cpu_down(dev->id, target);
2798 	return ret ? ret : count;
2815 	int fail, ret;
2817 	ret = kstrtoint(buf, 10, &fail);
2818 	if (ret)
2819 		return ret;
2850 		ret = -EINVAL;
2852 	if (ret)
2853 		return ret;
2928 	int ctrlval, ret, num_threads, orig_threads;
2957 	ret = lock_device_hotplug_sysfs();
2958 	if (ret)
2959 		return ret;
2967 		ret = cpuhp_smt_enable();
2969 		ret = cpuhp_smt_disable(ctrlval);
2972 	return ret ? ret : count;
3040 	int ret = -ENODEV;
3044 		ret = sysfs_create_group(&dev_root->kobj, &cpuhp_smt_attr_group);
3047 	return ret;
3053 	int cpu, ret;
3055 	ret = cpu_smt_sysfs_init();
3056 	if (ret)
3057 		return ret;
3061 		ret = sysfs_create_group(&dev_root->kobj, &cpuhp_cpu_root_attr_group);
3063 		if (ret)
3064 			return ret;
3072 		ret = sysfs_create_group(&dev->kobj, &cpuhp_cpu_attr_group);
3073 		if (ret)
3074 			return ret;