diff --git a/drivers/acpi/acpi_ipmi.c b/drivers/acpi/acpi_ipmi.c
index 9d6c0fc120d77d31e152b38f087b648b22a6cad8..5132922bf8b8abee33576c1630d8a8e449bfd424 100644
--- a/drivers/acpi/acpi_ipmi.c
+++ b/drivers/acpi/acpi_ipmi.c
@@ -22,6 +22,8 @@ MODULE_LICENSE("GPL");
 /* the IPMI timeout is 5s */
 #define IPMI_TIMEOUT			(5000)
 #define ACPI_IPMI_MAX_MSG_LENGTH	64
+/* 2s should be suffient for SMI being selected */
+#define ACPI_IPMI_SMI_SELECTION_TIMEOUT	(2 * HZ)
 
 struct acpi_ipmi_device {
 	/* the device list attached to driver_data.ipmi_devices */
@@ -54,6 +56,7 @@ struct ipmi_driver_data {
 	 * to this selected global IPMI system interface.
 	 */
 	struct acpi_ipmi_device *selected_smi;
+	struct completion smi_selection_done;
 };
 
 struct acpi_ipmi_msg {
@@ -465,8 +468,10 @@ static void ipmi_register_bmc(int iface, struct device *dev)
 		if (temp->handle == handle)
 			goto err_lock;
 	}
-	if (!driver_data.selected_smi)
+	if (!driver_data.selected_smi) {
 		driver_data.selected_smi = ipmi_device;
+		complete(&driver_data.smi_selection_done);
+	}
 	list_add_tail(&ipmi_device->head, &driver_data.ipmi_devices);
 	mutex_unlock(&driver_data.ipmi_lock);
 
@@ -582,6 +587,20 @@ acpi_ipmi_space_handler(u32 function, acpi_physical_address address,
 	return status;
 }
 
+int acpi_wait_for_acpi_ipmi(void)
+{
+	long ret;
+
+	ret = wait_for_completion_interruptible_timeout(&driver_data.smi_selection_done,
+							ACPI_IPMI_SMI_SELECTION_TIMEOUT);
+
+	if (ret <= 0)
+		return -ETIMEDOUT;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(acpi_wait_for_acpi_ipmi);
+
 static int __init acpi_ipmi_init(void)
 {
 	int result;
@@ -590,6 +609,8 @@ static int __init acpi_ipmi_init(void)
 	if (acpi_disabled)
 		return 0;
 
+	init_completion(&driver_data.smi_selection_done);
+
 	status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT,
 						    ACPI_ADR_SPACE_IPMI,
 						    &acpi_ipmi_space_handler,
diff --git a/drivers/hwmon/acpi_power_meter.c b/drivers/hwmon/acpi_power_meter.c
index 740ac0a1b7265b268e0673b8623107617839a6a5..52f53e044e42726633109e7afd5925f66341972e 100644
--- a/drivers/hwmon/acpi_power_meter.c
+++ b/drivers/hwmon/acpi_power_meter.c
@@ -32,6 +32,7 @@ ACPI_MODULE_NAME(ACPI_POWER_METER_NAME);
 #define POWER_METER_CAN_NOTIFY	(1 << 3)
 #define POWER_METER_IS_BATTERY	(1 << 8)
 #define UNKNOWN_HYSTERESIS	0xFFFFFFFF
+#define UNKNOWN_POWER		0xFFFFFFFF
 
 #define METER_NOTIFY_CONFIG	0x80
 #define METER_NOTIFY_TRIP	0x81
@@ -84,27 +85,17 @@ struct acpi_power_meter_resource {
 	u64		power;
 	u64		cap;
 	u64		avg_interval;
+	bool		power_alarm;
 	int			sensors_valid;
 	unsigned long		sensors_last_updated;
-	struct sensor_device_attribute	sensors[NUM_SENSORS];
-	int			num_sensors;
+#define POWER_METER_TRIP_AVERAGE_MIN_IDX	0
+#define POWER_METER_TRIP_AVERAGE_MAX_IDX	1
 	s64			trip[2];
 	int			num_domain_devices;
 	struct acpi_device	**domain_devices;
 	struct kobject		*holders_dir;
 };
 
-struct sensor_template {
-	char *label;
-	ssize_t (*show)(struct device *dev,
-			struct device_attribute *devattr,
-			char *buf);
-	ssize_t (*set)(struct device *dev,
-		       struct device_attribute *devattr,
-		       const char *buf, size_t count);
-	int index;
-};
-
 /* Averaging interval */
 static int update_avg_interval(struct acpi_power_meter_resource *resource)
 {
@@ -122,61 +113,6 @@ static int update_avg_interval(struct acpi_power_meter_resource *resource)
 	return 0;
 }
 
-static ssize_t show_avg_interval(struct device *dev,
-				 struct device_attribute *devattr,
-				 char *buf)
-{
-	struct acpi_device *acpi_dev = to_acpi_device(dev);
-	struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
-
-	mutex_lock(&resource->lock);
-	update_avg_interval(resource);
-	mutex_unlock(&resource->lock);
-
-	return sprintf(buf, "%llu\n", resource->avg_interval);
-}
-
-static ssize_t set_avg_interval(struct device *dev,
-				struct device_attribute *devattr,
-				const char *buf, size_t count)
-{
-	struct acpi_device *acpi_dev = to_acpi_device(dev);
-	struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
-	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
-	struct acpi_object_list args = { 1, &arg0 };
-	int res;
-	unsigned long temp;
-	unsigned long long data;
-	acpi_status status;
-
-	res = kstrtoul(buf, 10, &temp);
-	if (res)
-		return res;
-
-	if (temp > resource->caps.max_avg_interval ||
-	    temp < resource->caps.min_avg_interval)
-		return -EINVAL;
-	arg0.integer.value = temp;
-
-	mutex_lock(&resource->lock);
-	status = acpi_evaluate_integer(resource->acpi_dev->handle, "_PAI",
-				       &args, &data);
-	if (!ACPI_FAILURE(status))
-		resource->avg_interval = temp;
-	mutex_unlock(&resource->lock);
-
-	if (ACPI_FAILURE(status)) {
-		ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PAI"));
-		return -EINVAL;
-	}
-
-	/* _PAI returns 0 on success, nonzero otherwise */
-	if (data)
-		return -EINVAL;
-
-	return count;
-}
-
 /* Cap functions */
 static int update_cap(struct acpi_power_meter_resource *resource)
 {
@@ -194,60 +130,6 @@ static int update_cap(struct acpi_power_meter_resource *resource)
 	return 0;
 }
 
-static ssize_t show_cap(struct device *dev,
-			struct device_attribute *devattr,
-			char *buf)
-{
-	struct acpi_device *acpi_dev = to_acpi_device(dev);
-	struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
-
-	mutex_lock(&resource->lock);
-	update_cap(resource);
-	mutex_unlock(&resource->lock);
-
-	return sprintf(buf, "%llu\n", resource->cap * 1000);
-}
-
-static ssize_t set_cap(struct device *dev, struct device_attribute *devattr,
-		       const char *buf, size_t count)
-{
-	struct acpi_device *acpi_dev = to_acpi_device(dev);
-	struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
-	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
-	struct acpi_object_list args = { 1, &arg0 };
-	int res;
-	unsigned long temp;
-	unsigned long long data;
-	acpi_status status;
-
-	res = kstrtoul(buf, 10, &temp);
-	if (res)
-		return res;
-
-	temp = DIV_ROUND_CLOSEST(temp, 1000);
-	if (temp > resource->caps.max_cap || temp < resource->caps.min_cap)
-		return -EINVAL;
-	arg0.integer.value = temp;
-
-	mutex_lock(&resource->lock);
-	status = acpi_evaluate_integer(resource->acpi_dev->handle, "_SHL",
-				       &args, &data);
-	if (!ACPI_FAILURE(status))
-		resource->cap = temp;
-	mutex_unlock(&resource->lock);
-
-	if (ACPI_FAILURE(status)) {
-		ACPI_EXCEPTION((AE_INFO, status, "Evaluating _SHL"));
-		return -EINVAL;
-	}
-
-	/* _SHL returns 0 on success, nonzero otherwise */
-	if (data)
-		return -EINVAL;
-
-	return count;
-}
-
 /* Power meter trip points */
 static int set_acpi_trip(struct acpi_power_meter_resource *resource)
 {
@@ -281,32 +163,6 @@ static int set_acpi_trip(struct acpi_power_meter_resource *resource)
 	return 0;
 }
 
-static ssize_t set_trip(struct device *dev, struct device_attribute *devattr,
-			const char *buf, size_t count)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct acpi_device *acpi_dev = to_acpi_device(dev);
-	struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
-	int res;
-	unsigned long temp;
-
-	res = kstrtoul(buf, 10, &temp);
-	if (res)
-		return res;
-
-	temp = DIV_ROUND_CLOSEST(temp, 1000);
-
-	mutex_lock(&resource->lock);
-	resource->trip[attr->index - 7] = temp;
-	res = set_acpi_trip(resource);
-	mutex_unlock(&resource->lock);
-
-	if (res)
-		return res;
-
-	return count;
-}
-
 /* Power meter */
 static int update_meter(struct acpi_power_meter_resource *resource)
 {
@@ -332,186 +188,6 @@ static int update_meter(struct acpi_power_meter_resource *resource)
 	return 0;
 }
 
-static ssize_t show_power(struct device *dev,
-			  struct device_attribute *devattr,
-			  char *buf)
-{
-	struct acpi_device *acpi_dev = to_acpi_device(dev);
-	struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
-
-	mutex_lock(&resource->lock);
-	update_meter(resource);
-	mutex_unlock(&resource->lock);
-
-	return sprintf(buf, "%llu\n", resource->power * 1000);
-}
-
-/* Miscellaneous */
-static ssize_t show_str(struct device *dev,
-			struct device_attribute *devattr,
-			char *buf)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct acpi_device *acpi_dev = to_acpi_device(dev);
-	struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
-	acpi_string val;
-
-	switch (attr->index) {
-	case 0:
-		val = resource->model_number;
-		break;
-	case 1:
-		val = resource->serial_number;
-		break;
-	case 2:
-		val = resource->oem_info;
-		break;
-	default:
-		WARN(1, "Implementation error: unexpected attribute index %d\n",
-		     attr->index);
-		val = "";
-		break;
-	}
-
-	return sprintf(buf, "%s\n", val);
-}
-
-static ssize_t show_val(struct device *dev,
-			struct device_attribute *devattr,
-			char *buf)
-{
-	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
-	struct acpi_device *acpi_dev = to_acpi_device(dev);
-	struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
-	u64 val = 0;
-
-	switch (attr->index) {
-	case 0:
-		val = resource->caps.min_avg_interval;
-		break;
-	case 1:
-		val = resource->caps.max_avg_interval;
-		break;
-	case 2:
-		val = resource->caps.min_cap * 1000;
-		break;
-	case 3:
-		val = resource->caps.max_cap * 1000;
-		break;
-	case 4:
-		if (resource->caps.hysteresis == UNKNOWN_HYSTERESIS)
-			return sprintf(buf, "unknown\n");
-
-		val = resource->caps.hysteresis * 1000;
-		break;
-	case 5:
-		if (resource->caps.flags & POWER_METER_IS_BATTERY)
-			val = 1;
-		else
-			val = 0;
-		break;
-	case 6:
-		if (resource->power > resource->cap)
-			val = 1;
-		else
-			val = 0;
-		break;
-	case 7:
-	case 8:
-		if (resource->trip[attr->index - 7] < 0)
-			return sprintf(buf, "unknown\n");
-
-		val = resource->trip[attr->index - 7] * 1000;
-		break;
-	default:
-		WARN(1, "Implementation error: unexpected attribute index %d\n",
-		     attr->index);
-		break;
-	}
-
-	return sprintf(buf, "%llu\n", val);
-}
-
-static ssize_t show_accuracy(struct device *dev,
-			     struct device_attribute *devattr,
-			     char *buf)
-{
-	struct acpi_device *acpi_dev = to_acpi_device(dev);
-	struct acpi_power_meter_resource *resource = acpi_dev->driver_data;
-	unsigned int acc = resource->caps.accuracy;
-
-	return sprintf(buf, "%u.%u%%\n", acc / 1000, acc % 1000);
-}
-
-static ssize_t show_name(struct device *dev,
-			 struct device_attribute *devattr,
-			 char *buf)
-{
-	return sprintf(buf, "%s\n", ACPI_POWER_METER_NAME);
-}
-
-#define RO_SENSOR_TEMPLATE(_label, _show, _index)	\
-	{						\
-		.label = _label,			\
-		.show  = _show,				\
-		.index = _index,			\
-	}
-
-#define RW_SENSOR_TEMPLATE(_label, _show, _set, _index)	\
-	{						\
-		.label = _label,			\
-		.show  = _show,				\
-		.set   = _set,				\
-		.index = _index,			\
-	}
-
-/* Sensor descriptions.  If you add a sensor, update NUM_SENSORS above! */
-static struct sensor_template meter_attrs[] = {
-	RO_SENSOR_TEMPLATE(POWER_AVERAGE_NAME, show_power, 0),
-	RO_SENSOR_TEMPLATE("power1_accuracy", show_accuracy, 0),
-	RO_SENSOR_TEMPLATE("power1_average_interval_min", show_val, 0),
-	RO_SENSOR_TEMPLATE("power1_average_interval_max", show_val, 1),
-	RO_SENSOR_TEMPLATE("power1_is_battery", show_val, 5),
-	RW_SENSOR_TEMPLATE(POWER_AVG_INTERVAL_NAME, show_avg_interval,
-		set_avg_interval, 0),
-	{},
-};
-
-static struct sensor_template misc_cap_attrs[] = {
-	RO_SENSOR_TEMPLATE("power1_cap_min", show_val, 2),
-	RO_SENSOR_TEMPLATE("power1_cap_max", show_val, 3),
-	RO_SENSOR_TEMPLATE("power1_cap_hyst", show_val, 4),
-	RO_SENSOR_TEMPLATE(POWER_ALARM_NAME, show_val, 6),
-	{},
-};
-
-static struct sensor_template ro_cap_attrs[] = {
-	RO_SENSOR_TEMPLATE(POWER_CAP_NAME, show_cap, 0),
-	{},
-};
-
-static struct sensor_template rw_cap_attrs[] = {
-	RW_SENSOR_TEMPLATE(POWER_CAP_NAME, show_cap, set_cap, 0),
-	{},
-};
-
-static struct sensor_template trip_attrs[] = {
-	RW_SENSOR_TEMPLATE("power1_average_min", show_val, set_trip, 7),
-	RW_SENSOR_TEMPLATE("power1_average_max", show_val, set_trip, 8),
-	{},
-};
-
-static struct sensor_template misc_attrs[] = {
-	RO_SENSOR_TEMPLATE("name", show_name, 0),
-	RO_SENSOR_TEMPLATE("power1_model_number", show_str, 0),
-	RO_SENSOR_TEMPLATE("power1_oem_info", show_str, 2),
-	RO_SENSOR_TEMPLATE("power1_serial_number", show_str, 1),
-	{},
-};
-
-#undef RO_SENSOR_TEMPLATE
-#undef RW_SENSOR_TEMPLATE
-
 /* Read power domain data */
 static void remove_domain_devices(struct acpi_power_meter_resource *resource)
 {
@@ -614,108 +290,434 @@ static int read_domain_devices(struct acpi_power_meter_resource *resource)
 	return res;
 }
 
-/* Registration and deregistration */
-static int register_attrs(struct acpi_power_meter_resource *resource,
-			  struct sensor_template *attrs)
+static int set_trip(struct acpi_power_meter_resource *resource, u16 trip_idx,
+		    unsigned long trip)
 {
-	struct device *dev = &resource->acpi_dev->dev;
-	struct sensor_device_attribute *sensors =
-		&resource->sensors[resource->num_sensors];
-	int res = 0;
+	unsigned long trip_bk;
+	int ret;
+
+	trip = DIV_ROUND_CLOSEST(trip, 1000);
+	trip_bk = resource->trip[trip_idx];
+
+	resource->trip[trip_idx] = trip;
+	ret = set_acpi_trip(resource);
+	if (ret) {
+		dev_err(&resource->acpi_dev->dev, "set %s failed.\n",
+			(trip_idx == POWER_METER_TRIP_AVERAGE_MIN_IDX) ?
+			 "power1_average_min" : "power1_average_max");
+		resource->trip[trip_idx] = trip_bk;
+	}
 
-	while (attrs->label) {
-		sensors->dev_attr.attr.name = attrs->label;
-		sensors->dev_attr.attr.mode = 0444;
-		sensors->dev_attr.show = attrs->show;
-		sensors->index = attrs->index;
+	return ret;
+}
 
-		if (attrs->set) {
-			sensors->dev_attr.attr.mode |= 0200;
-			sensors->dev_attr.store = attrs->set;
-		}
+static int set_cap(struct acpi_power_meter_resource *resource,
+		   unsigned long cap)
+{
+	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
+	struct acpi_object_list args = { 1, &arg0 };
+	unsigned long long data;
+	acpi_status status;
 
-		sysfs_attr_init(&sensors->dev_attr.attr);
-		res = device_create_file(dev, &sensors->dev_attr);
-		if (res) {
-			sensors->dev_attr.attr.name = NULL;
-			goto error;
-		}
-		sensors++;
-		resource->num_sensors++;
-		attrs++;
+	cap = DIV_ROUND_CLOSEST(cap, 1000);
+	if (cap > resource->caps.max_cap || cap < resource->caps.min_cap)
+		return -EINVAL;
+
+	arg0.integer.value = cap;
+	status = acpi_evaluate_integer(resource->acpi_dev->handle, "_SHL",
+				       &args, &data);
+	if (ACPI_FAILURE(status)) {
+		acpi_handle_warn(resource->acpi_dev->handle, "_SHL evaluation failed: %s",
+				acpi_format_exception(status));
+		return -EINVAL;
 	}
+	resource->cap = cap;
 
-error:
-	return res;
+	/* _SHL returns 0 on success, nonzero otherwise */
+	if (data)
+		return -EINVAL;
+
+	return 0;
 }
 
-static void remove_attrs(struct acpi_power_meter_resource *resource)
+static int set_avg_interval(struct acpi_power_meter_resource *resource,
+			    unsigned long val)
 {
-	int i;
+	union acpi_object arg0 = { ACPI_TYPE_INTEGER };
+	struct acpi_object_list args = { 1, &arg0 };
+	unsigned long long data;
+	acpi_status status;
 
-	for (i = 0; i < resource->num_sensors; i++) {
-		if (!resource->sensors[i].dev_attr.attr.name)
-			continue;
-		device_remove_file(&resource->acpi_dev->dev,
-				   &resource->sensors[i].dev_attr);
+	if (val > resource->caps.max_avg_interval ||
+	    val < resource->caps.min_avg_interval)
+		return -EINVAL;
+
+	arg0.integer.value = val;
+	status = acpi_evaluate_integer(resource->acpi_dev->handle, "_PAI",
+				       &args, &data);
+	if (ACPI_FAILURE(status)) {
+		acpi_handle_warn(resource->acpi_dev->handle, "_PAI evaluation failed: %s\n",
+				acpi_format_exception(status));
+		return -EINVAL;
 	}
+	resource->avg_interval = val;
 
-	remove_domain_devices(resource);
+	/* _PAI returns 0 on success, nonzero otherwise */
+	if (data)
+		return -EINVAL;
 
-	resource->num_sensors = 0;
+	return 0;
 }
 
-static int setup_attrs(struct acpi_power_meter_resource *resource)
+static int get_power_alarm_state(struct acpi_power_meter_resource *resource,
+				 long *val)
 {
-	int res = 0;
+	int ret;
+
+	ret = update_meter(resource);
+	if (ret)
+		return ret;
+
+	/* need to update cap if not to support the notification. */
+	if (!(resource->caps.flags & POWER_METER_CAN_NOTIFY)) {
+		ret = update_cap(resource);
+		if (ret)
+			return ret;
+		resource->power_alarm = resource->power > resource->cap;
+		*val = resource->power_alarm;
+	} else {
+		*val = resource->power_alarm || resource->power > resource->cap;
+		resource->power_alarm = resource->power > resource->cap;
+	}
 
-	res = read_domain_devices(resource);
-	if (res)
-		return res;
+	return 0;
+}
 
-	if (resource->caps.flags & POWER_METER_CAN_MEASURE) {
-		res = register_attrs(resource, meter_attrs);
-		if (res)
-			goto error;
-	}
+static umode_t power_meter_is_visible(const void *data,
+				      enum hwmon_sensor_types type,
+				      u32 attr, int channel)
+{
+	const struct acpi_power_meter_resource *res = data;
 
-	if (resource->caps.flags & POWER_METER_CAN_CAP) {
-		if (!can_cap_in_hardware()) {
-			dev_warn(&resource->acpi_dev->dev,
-				 "Ignoring unsafe software power cap!\n");
-			goto skip_unsafe_cap;
+	if (type != hwmon_power)
+		return 0;
+
+	switch (attr) {
+	case hwmon_power_average:
+	case hwmon_power_average_interval_min:
+	case hwmon_power_average_interval_max:
+		if (res->caps.flags & POWER_METER_CAN_MEASURE)
+			return 0444;
+		break;
+	case hwmon_power_average_interval:
+		if (res->caps.flags & POWER_METER_CAN_MEASURE)
+			return 0644;
+		break;
+	case hwmon_power_cap_min:
+	case hwmon_power_cap_max:
+	case hwmon_power_alarm:
+		if (res->caps.flags & POWER_METER_CAN_CAP && can_cap_in_hardware())
+			return 0444;
+		break;
+	case hwmon_power_cap:
+		if (res->caps.flags & POWER_METER_CAN_CAP && can_cap_in_hardware()) {
+			if (res->caps.configurable_cap)
+				return 0644;
+			else
+				return 0444;
 		}
+		break;
+	default:
+		break;
+	}
 
-		if (resource->caps.configurable_cap)
-			res = register_attrs(resource, rw_cap_attrs);
-		else
-			res = register_attrs(resource, ro_cap_attrs);
+	return 0;
+}
 
-		if (res)
-			goto error;
+static int power_meter_read(struct device *dev, enum hwmon_sensor_types type,
+			    u32 attr, int channel, long *val)
+{
+	struct acpi_power_meter_resource *res = dev_get_drvdata(dev);
+	int ret = 0;
 
-		res = register_attrs(resource, misc_cap_attrs);
-		if (res)
-			goto error;
+	if (type != hwmon_power)
+		return -EINVAL;
+
+	guard(mutex)(&res->lock);
+
+	switch (attr) {
+	case hwmon_power_average:
+		ret = update_meter(res);
+		if (ret)
+			return ret;
+		if (res->power == UNKNOWN_POWER)
+			return -ENODATA;
+		*val = res->power * 1000;
+		break;
+	case hwmon_power_average_interval_min:
+		*val = res->caps.min_avg_interval;
+		break;
+	case hwmon_power_average_interval_max:
+		*val = res->caps.max_avg_interval;
+		break;
+	case hwmon_power_average_interval:
+		ret = update_avg_interval(res);
+		if (ret)
+			return ret;
+		*val = (res)->avg_interval;
+		break;
+	case hwmon_power_cap_min:
+		*val = res->caps.min_cap * 1000;
+		break;
+	case hwmon_power_cap_max:
+		*val = res->caps.max_cap * 1000;
+		break;
+	case hwmon_power_alarm:
+		ret = get_power_alarm_state(res, val);
+		if (ret)
+			return ret;
+		break;
+	case hwmon_power_cap:
+		ret = update_cap(res);
+		if (ret)
+			return ret;
+		*val = res->cap * 1000;
+		break;
+	default:
+		break;
 	}
 
-skip_unsafe_cap:
-	if (resource->caps.flags & POWER_METER_CAN_TRIP) {
-		res = register_attrs(resource, trip_attrs);
-		if (res)
-			goto error;
+	return 0;
+}
+
+static int power_meter_write(struct device *dev, enum hwmon_sensor_types type,
+			     u32 attr, int channel, long val)
+{
+	struct acpi_power_meter_resource *res = dev_get_drvdata(dev);
+	int ret;
+
+	if (type != hwmon_power)
+		return -EINVAL;
+
+	guard(mutex)(&res->lock);
+	switch (attr) {
+	case hwmon_power_cap:
+		ret = set_cap(res, val);
+		break;
+	case hwmon_power_average_interval:
+		ret = set_avg_interval(res, val);
+		break;
+	default:
+		ret = -EOPNOTSUPP;
 	}
 
-	res = register_attrs(resource, misc_attrs);
-	if (res)
-		goto error;
+	return ret;
+}
 
-	return res;
-error:
-	remove_attrs(resource);
-	return res;
+static const struct hwmon_channel_info * const power_meter_info[] = {
+	HWMON_CHANNEL_INFO(power, HWMON_P_AVERAGE |
+		HWMON_P_AVERAGE_INTERVAL | HWMON_P_AVERAGE_INTERVAL_MIN |
+		HWMON_P_AVERAGE_INTERVAL_MAX | HWMON_P_CAP | HWMON_P_CAP_MIN |
+		HWMON_P_CAP_MAX | HWMON_P_ALARM),
+	NULL
+};
+
+static const struct hwmon_ops power_meter_ops = {
+	.is_visible = power_meter_is_visible,
+	.read = power_meter_read,
+	.write = power_meter_write,
+};
+
+static const struct hwmon_chip_info power_meter_chip_info = {
+	.ops = &power_meter_ops,
+	.info = power_meter_info,
+};
+
+static ssize_t power1_average_max_store(struct device *dev,
+					struct device_attribute *attr,
+					const char *buf, size_t count)
+{
+	struct acpi_power_meter_resource *res = dev_get_drvdata(dev);
+	unsigned long trip;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &trip);
+	if (ret)
+		return ret;
+
+	mutex_lock(&res->lock);
+	ret = set_trip(res, POWER_METER_TRIP_AVERAGE_MAX_IDX, trip);
+	mutex_unlock(&res->lock);
+
+	return ret == 0 ? count : ret;
+}
+
+static ssize_t power1_average_min_store(struct device *dev,
+					struct device_attribute *attr,
+					const char *buf, size_t count)
+{
+	struct acpi_power_meter_resource *res = dev_get_drvdata(dev);
+	unsigned long trip;
+	int ret;
+
+	ret = kstrtoul(buf, 10, &trip);
+	if (ret)
+		return ret;
+
+	mutex_lock(&res->lock);
+	ret = set_trip(res, POWER_METER_TRIP_AVERAGE_MIN_IDX, trip);
+	mutex_unlock(&res->lock);
+
+	return ret == 0 ? count : ret;
+}
+
+static ssize_t power1_average_min_show(struct device *dev,
+				       struct device_attribute *attr, char *buf)
+{
+	struct acpi_power_meter_resource *res = dev_get_drvdata(dev);
+
+	if (res->trip[POWER_METER_TRIP_AVERAGE_MIN_IDX] < 0)
+		return sysfs_emit(buf, "unknown\n");
+
+	return sysfs_emit(buf, "%lld\n",
+			  res->trip[POWER_METER_TRIP_AVERAGE_MIN_IDX] * 1000);
+}
+
+static ssize_t power1_average_max_show(struct device *dev,
+				       struct device_attribute *attr, char *buf)
+{
+	struct acpi_power_meter_resource *res = dev_get_drvdata(dev);
+
+	if (res->trip[POWER_METER_TRIP_AVERAGE_MAX_IDX] < 0)
+		return sysfs_emit(buf, "unknown\n");
+
+	return sysfs_emit(buf, "%lld\n",
+			  res->trip[POWER_METER_TRIP_AVERAGE_MAX_IDX] * 1000);
+}
+
+static ssize_t power1_cap_hyst_show(struct device *dev,
+				    struct device_attribute *attr, char *buf)
+{
+	struct acpi_power_meter_resource *res = dev_get_drvdata(dev);
+
+	if (res->caps.hysteresis == UNKNOWN_HYSTERESIS)
+		return sysfs_emit(buf, "unknown\n");
+
+	return sysfs_emit(buf, "%llu\n", res->caps.hysteresis * 1000);
+}
+
+static ssize_t power1_accuracy_show(struct device *dev,
+				    struct device_attribute *attr,
+				    char *buf)
+{
+	struct acpi_power_meter_resource *res = dev_get_drvdata(dev);
+	unsigned int acc = res->caps.accuracy;
+
+	return sysfs_emit(buf, "%u.%u%%\n", acc / 1000, acc % 1000);
+}
+
+static ssize_t power1_is_battery_show(struct device *dev,
+				      struct device_attribute *attr,
+				      char *buf)
+{
+	struct acpi_power_meter_resource *res = dev_get_drvdata(dev);
+
+	return sysfs_emit(buf, "%u\n",
+			  res->caps.flags & POWER_METER_IS_BATTERY ? 1 : 0);
+}
+
+static ssize_t power1_model_number_show(struct device *dev,
+					struct device_attribute *attr,
+					char *buf)
+{
+	struct acpi_power_meter_resource *res = dev_get_drvdata(dev);
+
+	return sysfs_emit(buf, "%s\n", res->model_number);
+}
+
+static ssize_t power1_oem_info_show(struct device *dev,
+				    struct device_attribute *attr,
+				    char *buf)
+{
+	struct acpi_power_meter_resource *res = dev_get_drvdata(dev);
+
+	return sysfs_emit(buf, "%s\n", res->oem_info);
+}
+
+static ssize_t power1_serial_number_show(struct device *dev,
+					 struct device_attribute *attr,
+					 char *buf)
+{
+	struct acpi_power_meter_resource *res = dev_get_drvdata(dev);
+
+	return sysfs_emit(buf, "%s\n", res->serial_number);
+}
+
+/* depend on POWER_METER_CAN_TRIP */
+static DEVICE_ATTR_RW(power1_average_max);
+static DEVICE_ATTR_RW(power1_average_min);
+
+/* depend on POWER_METER_CAN_CAP */
+static DEVICE_ATTR_RO(power1_cap_hyst);
+
+/* depend on POWER_METER_CAN_MEASURE */
+static DEVICE_ATTR_RO(power1_accuracy);
+static DEVICE_ATTR_RO(power1_is_battery);
+
+static DEVICE_ATTR_RO(power1_model_number);
+static DEVICE_ATTR_RO(power1_oem_info);
+static DEVICE_ATTR_RO(power1_serial_number);
+
+static umode_t power_extra_is_visible(struct kobject *kobj,
+				      struct attribute *attr, int idx)
+{
+	struct device *dev = kobj_to_dev(kobj);
+	struct acpi_power_meter_resource *res = dev_get_drvdata(dev);
+
+	if (attr == &dev_attr_power1_is_battery.attr ||
+	    attr == &dev_attr_power1_accuracy.attr) {
+		if ((res->caps.flags & POWER_METER_CAN_MEASURE) == 0)
+			return 0;
+	}
+
+	if (attr == &dev_attr_power1_cap_hyst.attr) {
+		if ((res->caps.flags & POWER_METER_CAN_CAP) == 0) {
+			return 0;
+		} else if (!can_cap_in_hardware()) {
+			dev_warn(&res->acpi_dev->dev,
+				 "Ignoring unsafe software power cap!\n");
+			return 0;
+		}
+	}
+
+	if (attr == &dev_attr_power1_average_max.attr ||
+	    attr == &dev_attr_power1_average_min.attr) {
+		if ((res->caps.flags & POWER_METER_CAN_TRIP) == 0)
+			return 0;
+	}
+
+	return attr->mode;
 }
 
+static struct attribute *power_extra_attrs[] = {
+	&dev_attr_power1_average_max.attr,
+	&dev_attr_power1_average_min.attr,
+	&dev_attr_power1_cap_hyst.attr,
+	&dev_attr_power1_accuracy.attr,
+	&dev_attr_power1_is_battery.attr,
+	&dev_attr_power1_model_number.attr,
+	&dev_attr_power1_oem_info.attr,
+	&dev_attr_power1_serial_number.attr,
+	NULL
+};
+
+static const struct attribute_group power_extra_group = {
+	.attrs = power_extra_attrs,
+	.is_visible = power_extra_is_visible,
+};
+
+__ATTRIBUTE_GROUPS(power_extra);
+
 static void free_capabilities(struct acpi_power_meter_resource *resource)
 {
 	acpi_string *str;
@@ -821,18 +823,34 @@ static void acpi_power_meter_notify(struct acpi_device *device, u32 event)
 	switch (event) {
 	case METER_NOTIFY_CONFIG:
 		free_capabilities(resource);
+		remove_domain_devices(resource);
+		hwmon_device_unregister(resource->hwmon_dev);
 		res = read_capabilities(resource);
 		if (res)
-			break;
-
-		remove_attrs(resource);
-		setup_attrs(resource);
+			dev_err_once(&device->dev, "read capabilities failed.\n");
+		res = read_domain_devices(resource);
+		if (res && res != -ENODEV)
+			dev_err_once(&device->dev, "read domain devices failed.\n");
+		resource->hwmon_dev =
+			hwmon_device_register_with_info(&device->dev,
+							ACPI_POWER_METER_NAME,
+							resource,
+							&power_meter_chip_info,
+							power_extra_groups);
+		if (IS_ERR(resource->hwmon_dev))
+			dev_err_once(&device->dev, "register hwmon device failed.\n");
+		mutex_unlock(&resource->lock);
 		break;
 	case METER_NOTIFY_TRIP:
 		sysfs_notify(&device->dev.kobj, NULL, POWER_AVERAGE_NAME);
 		update_meter(resource);
 		break;
 	case METER_NOTIFY_CAP:
+		mutex_lock(&resource->lock);
+		res = update_cap(resource);
+		if (res)
+			dev_err_once(&device->dev, "update cap failed when capping value is changed.\n");
+		mutex_unlock(&resource->lock);
 		sysfs_notify(&device->dev.kobj, NULL, POWER_CAP_NAME);
 		update_cap(resource);
 		break;
@@ -841,6 +859,9 @@ static void acpi_power_meter_notify(struct acpi_device *device, u32 event)
 		update_avg_interval(resource);
 		break;
 	case METER_NOTIFY_CAPPING:
+		mutex_lock(&resource->lock);
+		resource->power_alarm = true;
+		mutex_unlock(&resource->lock);
 		sysfs_notify(&device->dev.kobj, NULL, POWER_ALARM_NAME);
 		dev_info(&device->dev, "Capping in progress.\n");
 		break;
@@ -875,17 +896,39 @@ static int acpi_power_meter_add(struct acpi_device *device)
 	device->driver_data = resource;
 
 	free_capabilities(resource);
+
+#if IS_REACHABLE(CONFIG_ACPI_IPMI)
+	/*
+	 * On Dell systems several methods of acpi_power_meter access
+	 * variables in IPMI region, so wait until IPMI space handler is
+	 * installed by acpi_ipmi and also wait until SMI is selected to make
+	 * the space handler fully functional.
+	 */
+	if (dmi_match(DMI_SYS_VENDOR, "Dell Inc.")) {
+		struct acpi_device *ipi_device = acpi_dev_get_first_match_dev("IPI0001", NULL, -1);
+
+		if (ipi_device && acpi_wait_for_acpi_ipmi())
+			dev_warn(&device->dev, "Waiting for ACPI IPMI timeout");
+		acpi_dev_put(ipi_device);
+	}
+#endif
+
 	res = read_capabilities(resource);
 	if (res)
 		goto exit_free;
 
 	resource->trip[0] = resource->trip[1] = -1;
 
-	res = setup_attrs(resource);
-	if (res)
+	/* _PMD method is optional. */
+	res = read_domain_devices(resource);
+	if (res && res != -ENODEV)
 		goto exit_free_capability;
 
-	resource->hwmon_dev = hwmon_device_register(&device->dev);
+	resource->hwmon_dev =
+		hwmon_device_register_with_info(&device->dev,
+						ACPI_POWER_METER_NAME, resource,
+						&power_meter_chip_info,
+						power_extra_groups);
 	if (IS_ERR(resource->hwmon_dev)) {
 		res = PTR_ERR(resource->hwmon_dev);
 		goto exit_remove;
@@ -895,7 +938,7 @@ static int acpi_power_meter_add(struct acpi_device *device)
 	goto exit;
 
 exit_remove:
-	remove_attrs(resource);
+	remove_domain_devices(resource);
 exit_free_capability:
 	free_capabilities(resource);
 exit_free:
@@ -915,7 +958,7 @@ static int acpi_power_meter_remove(struct acpi_device *device)
 	hwmon_device_unregister(resource->hwmon_dev);
 
 	free_capabilities(resource);
-	remove_attrs(resource);
+	remove_domain_devices(resource);
 
 	kfree(resource);
 	return 0;
diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c
index a2175394cd253f7c443f1d874404db6ca96b8fc2..8195b5b2a9a3d7882e262fc27642f2753ca93981 100644
--- a/drivers/hwmon/hwmon.c
+++ b/drivers/hwmon/hwmon.c
@@ -409,8 +409,8 @@ static const char * const hwmon_curr_attr_templates[] = {
 static const char * const hwmon_power_attr_templates[] = {
 	[hwmon_power_average] = "power%d_average",
 	[hwmon_power_average_interval] = "power%d_average_interval",
-	[hwmon_power_average_interval_max] = "power%d_interval_max",
-	[hwmon_power_average_interval_min] = "power%d_interval_min",
+	[hwmon_power_average_interval_max] = "power%d_average_interval_max",
+	[hwmon_power_average_interval_min] = "power%d_average_interval_min",
 	[hwmon_power_average_highest] = "power%d_average_highest",
 	[hwmon_power_average_lowest] = "power%d_average_lowest",
 	[hwmon_power_average_max] = "power%d_average_max",
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 1e5ae3b01eb2bcffe3e6908e1d7ddb081a260214..2a1e5cfbdb4029f214591068aaaea3e80b64fc86 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -684,11 +684,16 @@ static inline void acpi_dev_put(struct acpi_device *adev)
 	if (adev)
 		put_device(&adev->dev);
 }
+
+int acpi_wait_for_acpi_ipmi(void);
+
 #else	/* CONFIG_ACPI */
 
 static inline int register_acpi_bus_type(void *bus) { return 0; }
 static inline int unregister_acpi_bus_type(void *bus) { return 0; }
 
+static inline int acpi_wait_for_acpi_ipmi(void) { return 0; }
+
 #endif				/* CONFIG_ACPI */
 
 #endif /*__ACPI_BUS_H__*/
diff --git a/include/linux/cleanup.h b/include/linux/cleanup.h
new file mode 100644
index 0000000000000000000000000000000000000000..64b8600eb8c0e4a2ea8a0b89aa659c32c45266a9
--- /dev/null
+++ b/include/linux/cleanup.h
@@ -0,0 +1,249 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_GUARDS_H
+#define __LINUX_GUARDS_H
+
+#include <linux/compiler.h>
+
+/*
+ * DEFINE_FREE(name, type, free):
+ *	simple helper macro that defines the required wrapper for a __free()
+ *	based cleanup function. @free is an expression using '_T' to access
+ *	the variable.
+ *
+ * __free(name):
+ *	variable attribute to add a scoped based cleanup to the variable.
+ *
+ * no_free_ptr(var):
+ *	like a non-atomic xchg(var, NULL), such that the cleanup function will
+ *	be inhibited -- provided it sanely deals with a NULL value.
+ *
+ * return_ptr(p):
+ *	returns p while inhibiting the __free().
+ *
+ * Ex.
+ *
+ * DEFINE_FREE(kfree, void *, if (_T) kfree(_T))
+ *
+ *	struct obj *p __free(kfree) = kmalloc(...);
+ *	if (!p)
+ *		return NULL;
+ *
+ *	if (!init_obj(p))
+ *		return NULL;
+ *
+ *	return_ptr(p);
+ */
+
+#define DEFINE_FREE(_name, _type, _free) \
+	static inline void __free_##_name(void *p) { _type _T = *(_type *)p; _free; }
+
+#define __free(_name)	__cleanup(__free_##_name)
+
+#define no_free_ptr(p) \
+	({ __auto_type __ptr = (p); (p) = NULL; __ptr; })
+
+#define return_ptr(p)	return no_free_ptr(p)
+
+
+/*
+ * DEFINE_CLASS(name, type, exit, init, init_args...):
+ *	helper to define the destructor and constructor for a type.
+ *	@exit is an expression using '_T' -- similar to FREE above.
+ *	@init is an expression in @init_args resulting in @type
+ *
+ * EXTEND_CLASS(name, ext, init, init_args...):
+ *	extends class @name to @name@ext with the new constructor
+ *
+ * CLASS(name, var)(args...):
+ *	declare the variable @var as an instance of the named class
+ *
+ * Ex.
+ *
+ * DEFINE_CLASS(fdget, struct fd, fdput(_T), fdget(fd), int fd)
+ *
+ *	CLASS(fdget, f)(fd);
+ *	if (!f.file)
+ *		return -EBADF;
+ *
+ *	// use 'f' without concern
+ */
+
+#define DEFINE_CLASS(_name, _type, _exit, _init, _init_args...)		\
+typedef _type class_##_name##_t;					\
+static inline void class_##_name##_destructor(_type *p)			\
+{ _type _T = *p; _exit; }						\
+static inline _type class_##_name##_constructor(_init_args)		\
+{ _type t = _init; return t; }
+
+#define EXTEND_CLASS(_name, ext, _init, _init_args...)			\
+typedef class_##_name##_t class_##_name##ext##_t;			\
+static inline void class_##_name##ext##_destructor(class_##_name##_t *p)\
+{ class_##_name##_destructor(p); }					\
+static inline class_##_name##_t class_##_name##ext##_constructor(_init_args) \
+{ class_##_name##_t t = _init; return t; }
+
+#define CLASS(_name, var)						\
+	class_##_name##_t var __cleanup(class_##_name##_destructor) =	\
+		class_##_name##_constructor
+
+
+/*
+ * DEFINE_GUARD(name, type, lock, unlock):
+ *	trivial wrapper around DEFINE_CLASS() above specifically
+ *	for locks.
+ *
+ * DEFINE_GUARD_COND(name, ext, condlock)
+ *	wrapper around EXTEND_CLASS above to add conditional lock
+ *	variants to a base class, eg. mutex_trylock() or
+ *	mutex_lock_interruptible().
+ *
+ * guard(name):
+ *	an anonymous instance of the (guard) class, not recommended for
+ *	conditional locks.
+ *
+ * scoped_guard (name, args...) { }:
+ *	similar to CLASS(name, scope)(args), except the variable (with the
+ *	explicit name 'scope') is declard in a for-loop such that its scope is
+ *	bound to the next (compound) statement.
+ *
+ *	for conditional locks the loop body is skipped when the lock is not
+ *	acquired.
+ *
+ * scoped_cond_guard (name, fail, args...) { }:
+ *      similar to scoped_guard(), except it does fail when the lock
+ *      acquire fails.
+ *
+ *      Only for conditional locks.
+ */
+
+#define __DEFINE_CLASS_IS_CONDITIONAL(_name, _is_cond)	\
+static __maybe_unused const bool class_##_name##_is_conditional = _is_cond
+
+#define DEFINE_GUARD(_name, _type, _lock, _unlock) \
+	__DEFINE_CLASS_IS_CONDITIONAL(_name, false); \
+	DEFINE_CLASS(_name, _type, if (_T) { _unlock; }, ({ _lock; _T; }), _type _T); \
+	static inline void * class_##_name##_lock_ptr(class_##_name##_t *_T) \
+	{ return (void *)(__force unsigned long)*_T; }
+
+#define DEFINE_GUARD_COND(_name, _ext, _condlock) \
+	__DEFINE_CLASS_IS_CONDITIONAL(_name##_ext, true); \
+	EXTEND_CLASS(_name, _ext, \
+		     ({ void *_t = _T; if (_T && !(_condlock)) _t = NULL; _t; }), \
+		     class_##_name##_t _T) \
+	static inline void * class_##_name##_ext##_lock_ptr(class_##_name##_t *_T) \
+	{ return class_##_name##_lock_ptr(_T); }
+
+#define guard(_name) \
+	CLASS(_name, __UNIQUE_ID(guard))
+
+#define __guard_ptr(_name) class_##_name##_lock_ptr
+#define __is_cond_ptr(_name) class_##_name##_is_conditional
+
+/*
+ * Helper macro for scoped_guard().
+ *
+ * Note that the "!__is_cond_ptr(_name)" part of the condition ensures that
+ * compiler would be sure that for the unconditional locks the body of the
+ * loop (caller-provided code glued to the else clause) could not be skipped.
+ * It is needed because the other part - "__guard_ptr(_name)(&scope)" - is too
+ * hard to deduce (even if could be proven true for unconditional locks).
+ */
+#define __scoped_guard(_name, _label, args...)				\
+	for (CLASS(_name, scope)(args);					\
+	     __guard_ptr(_name)(&scope) || !__is_cond_ptr(_name);	\
+	     ({ goto _label; }))					\
+		if (0) {						\
+_label:									\
+			break;						\
+		} else
+
+#define scoped_guard(_name, args...)	\
+	__scoped_guard(_name, __UNIQUE_ID(label), args)
+
+#define __scoped_cond_guard(_name, _fail, _label, args...)		\
+	for (CLASS(_name, scope)(args); true; ({ goto _label; }))	\
+		if (!__guard_ptr(_name)(&scope)) {			\
+			BUILD_BUG_ON(!__is_cond_ptr(_name));		\
+			_fail;						\
+_label:									\
+			break;						\
+		} else
+
+#define scoped_cond_guard(_name, _fail, args...)	\
+	__scoped_cond_guard(_name, _fail, __UNIQUE_ID(label), args)
+/*
+ * Additional helper macros for generating lock guards with types, either for
+ * locks that don't have a native type (eg. RCU, preempt) or those that need a
+ * 'fat' pointer (eg. spin_lock_irqsave).
+ *
+ * DEFINE_LOCK_GUARD_0(name, lock, unlock, ...)
+ * DEFINE_LOCK_GUARD_1(name, type, lock, unlock, ...)
+ * DEFINE_LOCK_GUARD_1_COND(name, ext, condlock)
+ *
+ * will result in the following type:
+ *
+ *   typedef struct {
+ *	type *lock;		// 'type := void' for the _0 variant
+ *	__VA_ARGS__;
+ *   } class_##name##_t;
+ *
+ * As above, both _lock and _unlock are statements, except this time '_T' will
+ * be a pointer to the above struct.
+ */
+
+#define __DEFINE_UNLOCK_GUARD(_name, _type, _unlock, ...)		\
+typedef struct {							\
+	_type *lock;							\
+	__VA_ARGS__;							\
+} class_##_name##_t;							\
+									\
+static inline void class_##_name##_destructor(class_##_name##_t *_T)	\
+{									\
+	if (_T->lock) { _unlock; }					\
+}									\
+									\
+static inline void *class_##_name##_lock_ptr(class_##_name##_t *_T)	\
+{									\
+	return (void *)(__force unsigned long)_T->lock;			\
+}
+
+
+#define __DEFINE_LOCK_GUARD_1(_name, _type, _lock)			\
+static inline class_##_name##_t class_##_name##_constructor(_type *l)	\
+{									\
+	class_##_name##_t _t = { .lock = l }, *_T = &_t;		\
+	_lock;								\
+	return _t;							\
+}
+
+#define __DEFINE_LOCK_GUARD_0(_name, _lock)				\
+static inline class_##_name##_t class_##_name##_constructor(void)	\
+{									\
+	class_##_name##_t _t = { .lock = (void*)1 },			\
+			 *_T __maybe_unused = &_t;			\
+	_lock;								\
+	return _t;							\
+}
+
+#define DEFINE_LOCK_GUARD_1(_name, _type, _lock, _unlock, ...)		\
+__DEFINE_CLASS_IS_CONDITIONAL(_name, false);				\
+__DEFINE_UNLOCK_GUARD(_name, _type, _unlock, __VA_ARGS__)		\
+__DEFINE_LOCK_GUARD_1(_name, _type, _lock)
+
+#define DEFINE_LOCK_GUARD_0(_name, _lock, _unlock, ...)			\
+__DEFINE_CLASS_IS_CONDITIONAL(_name, false);				\
+__DEFINE_UNLOCK_GUARD(_name, void, _unlock, __VA_ARGS__)		\
+__DEFINE_LOCK_GUARD_0(_name, _lock)
+
+#define DEFINE_LOCK_GUARD_1_COND(_name, _ext, _condlock)		\
+	__DEFINE_CLASS_IS_CONDITIONAL(_name##_ext, true);		\
+	EXTEND_CLASS(_name, _ext,					\
+		     ({ class_##_name##_t _t = { .lock = l }, *_T = &_t;\
+		        if (_T->lock && !(_condlock)) _T->lock = NULL;	\
+			_t; }),						\
+		     typeof_member(class_##_name##_t, lock) l)		\
+	static inline void * class_##_name##_ext##_lock_ptr(class_##_name##_t *_T) \
+	{ return class_##_name##_lock_ptr(_T); }
+
+
+#endif /* __LINUX_GUARDS_H */
diff --git a/include/linux/compiler-clang.h b/include/linux/compiler-clang.h
index 0e06df20928c46d55b3fd96f1830ab6828c89285..79b68ed5aa57dc8be3569ed99b33e0aaf639c9f0 100644
--- a/include/linux/compiler-clang.h
+++ b/include/linux/compiler-clang.h
@@ -6,6 +6,14 @@
 /* Compiler specific definitions for Clang compiler */
 
 #define uninitialized_var(x) x = *(&(x))
+/*
+ * Clang prior to 17 is being silly and considers many __cleanup() variables
+ * as unused (because they are, their sole purpose is to go out of scope).
+ *
+ * https://reviews.llvm.org/D152180
+ */
+#undef __cleanup
+#define __cleanup(func) __maybe_unused __attribute__((__cleanup__(func)))
 
 /* same as gcc, this was present in clang-2.6 so we can assume it works
  * with any version that can compile the kernel
diff --git a/include/linux/compiler_attributes.h b/include/linux/compiler_attributes.h
index 080ca3230b51d6fbb9282d0576d4f7a98269be4b..32837f9ec489cb7e0ec9e74744859acfa4d4d33a 100644
--- a/include/linux/compiler_attributes.h
+++ b/include/linux/compiler_attributes.h
@@ -95,6 +95,12 @@
  */
 #define __cold                          __attribute__((__cold__))
 
+/*
+ *   gcc: https://gcc.gnu.org/onlinedocs/gcc/Common-Variable-Attributes.html#index-cleanup-variable-attribute
+ * clang: https://clang.llvm.org/docs/AttributeReference.html#cleanup
+ */
+#define __cleanup(func)			__attribute__((__cleanup__(func)))
+
 /*
  * Note the long name.
  *
diff --git a/include/linux/device.h b/include/linux/device.h
index 2cf9e89aeb3b660944ff972148c39678cd4b2683..e60f500ede3ecb18a5e195a8e14d865d5cbb55bb 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -26,6 +26,7 @@
 #include <linux/uidgid.h>
 #include <linux/gfp.h>
 #include <linux/overflow.h>
+#include <linux/cleanup.h>
 #include <asm/device.h>
 #include <linux/kabi.h>
 
@@ -1522,6 +1523,9 @@ extern void device_unregister(struct device *dev);
 extern void device_initialize(struct device *dev);
 extern int __must_check device_add(struct device *dev);
 extern void device_del(struct device *dev);
+
+DEFINE_FREE(device_del, struct device *, if (_T) device_del(_T))
+
 extern bool device_is_hidden(struct device *dev);
 extern int device_hide(struct device *dev);
 extern int device_unhide(struct device *dev);
@@ -1656,6 +1660,9 @@ extern int (*platform_notify_remove)(struct device *dev);
  */
 extern struct device *get_device(struct device *dev);
 extern void put_device(struct device *dev);
+
+DEFINE_FREE(put_device, struct device *, if (_T) put_device(_T))
+
 extern bool kill_device(struct device *dev);
 
 #ifdef CONFIG_DEVTMPFS
diff --git a/include/linux/file.h b/include/linux/file.h
index 3fcddff56bc4bb30b7ac46da444be05a771964bf..7d94be8bd4cc9e8c8b9218738d9967517b0d1205 100644
--- a/include/linux/file.h
+++ b/include/linux/file.h
@@ -9,6 +9,7 @@
 #include <linux/compiler.h>
 #include <linux/types.h>
 #include <linux/posix_types.h>
+#include <linux/cleanup.h>
 
 struct file;
 
@@ -79,6 +80,8 @@ static inline void fdput_pos(struct fd f)
 	fdput(f);
 }
 
+DEFINE_CLASS(fd, struct fd, fdput(_T), fdget(fd), int fd)
+
 extern int f_dupfd(unsigned int from, struct file *file, unsigned flags);
 extern int replace_fd(unsigned fd, struct file *file, unsigned flags);
 extern void set_close_on_exec(unsigned int fd, int flag);
@@ -86,6 +89,9 @@ extern bool get_close_on_exec(unsigned int fd);
 extern int get_unused_fd_flags(unsigned flags);
 extern void put_unused_fd(unsigned int fd);
 
+DEFINE_CLASS(get_unused_fd, int, if (_T >= 0) put_unused_fd(_T),
+	     get_unused_fd_flags(flags), unsigned flags)
+
 extern void fd_install(unsigned int fd, struct file *file);
 
 extern void flush_delayed_fput(void);
diff --git a/include/linux/irqflags.h b/include/linux/irqflags.h
index 21619c92c3770ca0cfc1f3381bee2fe8f065da88..cba728fad8aedbede6932d590d85a006acd53089 100644
--- a/include/linux/irqflags.h
+++ b/include/linux/irqflags.h
@@ -13,6 +13,7 @@
 #define _LINUX_TRACE_IRQFLAGS_H
 
 #include <linux/typecheck.h>
+#include <linux/cleanup.h>
 #include <asm/irqflags.h>
 
 /* Currently trace_softirqs_on/off is used only by lockdep */
@@ -168,4 +169,10 @@ do {						\
 
 #define irqs_disabled_flags(flags) raw_irqs_disabled_flags(flags)
 
+DEFINE_LOCK_GUARD_0(irq, local_irq_disable(), local_irq_enable())
+DEFINE_LOCK_GUARD_0(irqsave,
+		    local_irq_save(_T->flags),
+		    local_irq_restore(_T->flags),
+		    unsigned long flags)
+
 #endif
diff --git a/include/linux/mutex.h b/include/linux/mutex.h
index 479bc96c3e63aa10ceabd484bdd850576d65733b..9118777f74b63110fd14fb874a9186a3b8ab8cd3 100644
--- a/include/linux/mutex.h
+++ b/include/linux/mutex.h
@@ -19,6 +19,7 @@
 #include <asm/processor.h>
 #include <linux/osq_lock.h>
 #include <linux/debug_locks.h>
+#include <linux/cleanup.h>
 
 struct ww_acquire_ctx;
 
@@ -210,4 +211,8 @@ enum mutex_trylock_recursive_enum {
 extern /* __deprecated */ __must_check enum mutex_trylock_recursive_enum
 mutex_trylock_recursive(struct mutex *lock);
 
+DEFINE_GUARD(mutex, struct mutex *, mutex_lock(_T), mutex_unlock(_T))
+DEFINE_GUARD_COND(mutex, _try, mutex_trylock(_T))
+DEFINE_GUARD_COND(mutex, _intr, mutex_lock_interruptible(_T) == 0)
+
 #endif /* __LINUX_MUTEX_H */
diff --git a/include/linux/percpu.h b/include/linux/percpu.h
index 5e76af742c807afd3630e630156ab7962c26acdb..c9a84532bb7932c3ff9b7123c274b812578f7940 100644
--- a/include/linux/percpu.h
+++ b/include/linux/percpu.h
@@ -9,6 +9,7 @@
 #include <linux/printk.h>
 #include <linux/pfn.h>
 #include <linux/init.h>
+#include <linux/cleanup.h>
 
 #include <asm/percpu.h>
 
@@ -134,6 +135,9 @@ extern void __init setup_per_cpu_areas(void);
 extern void __percpu *__alloc_percpu_gfp(size_t size, size_t align, gfp_t gfp);
 extern void __percpu *__alloc_percpu(size_t size, size_t align);
 extern void free_percpu(void __percpu *__pdata);
+
+DEFINE_FREE(free_percpu, void __percpu *, free_percpu(_T))
+
 extern phys_addr_t per_cpu_ptr_to_phys(void *addr);
 
 #define alloc_percpu_gfp(type, gfp)					\
diff --git a/include/linux/rcupdate.h b/include/linux/rcupdate.h
index c75b38ba4a7282377bc838da35e4179d63fd0747..9d4b601a349a3c33de97077728ba770d92e87cc4 100644
--- a/include/linux/rcupdate.h
+++ b/include/linux/rcupdate.h
@@ -27,6 +27,7 @@
 #include <linux/preempt.h>
 #include <linux/bottom_half.h>
 #include <linux/lockdep.h>
+#include <linux/cleanup.h>
 #include <asm/processor.h>
 #include <linux/cpumask.h>
 
@@ -914,4 +915,6 @@ rcu_head_after_call_rcu(struct rcu_head *rhp, rcu_callback_t f)
 	return false;
 }
 
+DEFINE_LOCK_GUARD_0(rcu, rcu_read_lock(), rcu_read_unlock())
+
 #endif /* __LINUX_RCUPDATE_H */
diff --git a/include/linux/rwsem.h b/include/linux/rwsem.h
index 8a3606372abc812532b07672ae16590d84b6b4c3..c8ebdaa050e4ab0365e8eb9458570ed345d41e1a 100644
--- a/include/linux/rwsem.h
+++ b/include/linux/rwsem.h
@@ -16,6 +16,8 @@
 #include <linux/spinlock.h>
 #include <linux/atomic.h>
 #include <linux/err.h>
+#include <linux/cleanup.h>
+
 #ifdef CONFIG_RWSEM_SPIN_ON_OWNER
 #include <linux/osq_lock.h>
 #endif
@@ -154,6 +156,13 @@ extern void up_read(struct rw_semaphore *sem);
  */
 extern void up_write(struct rw_semaphore *sem);
 
+DEFINE_GUARD(rwsem_read, struct rw_semaphore *, down_read(_T), up_read(_T))
+DEFINE_GUARD_COND(rwsem_read, _try, down_read_trylock(_T))
+DEFINE_GUARD_COND(rwsem_read, _intr, down_read_interruptible(_T) == 0)
+
+DEFINE_GUARD(rwsem_write, struct rw_semaphore *, down_write(_T), up_write(_T))
+DEFINE_GUARD_COND(rwsem_write, _try, down_write_trylock(_T))
+
 /*
  * downgrade write lock to read lock
  */
diff --git a/include/linux/sched/task.h b/include/linux/sched/task.h
index 6f33a07858cf6a92dfedc45f05f8437bf0d99b5e..9bf463a2fc131a8c20add0fe2e9280d61e6a3d47 100644
--- a/include/linux/sched/task.h
+++ b/include/linux/sched/task.h
@@ -120,6 +120,8 @@ static inline void put_task_struct(struct task_struct *t)
 		__put_task_struct(t);
 }
 
+DEFINE_FREE(put_task, struct task_struct *, if (_T) put_task_struct(_T))
+
 void put_task_struct_rcu_user(struct task_struct *task);
 
 #ifdef CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT
diff --git a/include/linux/slab.h b/include/linux/slab.h
index c07828ddfcad786d235ea6a1aadf29f46fc71d2c..961a04c177e3b4bb6672b2ac2583cc4201099e5e 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -17,6 +17,7 @@
 #include <linux/types.h>
 #include <linux/workqueue.h>
 #include <linux/percpu-refcount.h>
+#include <linux/cleanup.h>
 
 
 /*
@@ -186,6 +187,9 @@ void * __must_check krealloc(const void *, size_t, gfp_t);
 void kfree(const void *);
 void kzfree(const void *);
 size_t __ksize(const void *);
+
+DEFINE_FREE(kfree, void *, if (_T) kfree(_T))
+
 size_t ksize(const void *);
 
 #ifdef CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR
diff --git a/include/linux/spinlock.h b/include/linux/spinlock.h
index 031ce8617df8fff0eb06caf65df251297b5c6862..03fe7c5b6051de5d0e2b16079e873382cbea80a6 100644
--- a/include/linux/spinlock.h
+++ b/include/linux/spinlock.h
@@ -56,6 +56,7 @@
 #include <linux/kernel.h>
 #include <linux/stringify.h>
 #include <linux/bottom_half.h>
+#include <linux/cleanup.h>
 #include <asm/barrier.h>
 #include <asm/mmiowb.h>
 
@@ -477,4 +478,49 @@ int __alloc_bucket_spinlocks(spinlock_t **locks, unsigned int *lock_mask,
 
 void free_bucket_spinlocks(spinlock_t *locks);
 
+DEFINE_LOCK_GUARD_1(raw_spinlock, raw_spinlock_t,
+		    raw_spin_lock(_T->lock),
+		    raw_spin_unlock(_T->lock))
+
+DEFINE_LOCK_GUARD_1_COND(raw_spinlock, _try, raw_spin_trylock(_T->lock))
+
+DEFINE_LOCK_GUARD_1(raw_spinlock_nested, raw_spinlock_t,
+		    raw_spin_lock_nested(_T->lock, SINGLE_DEPTH_NESTING),
+		    raw_spin_unlock(_T->lock))
+
+DEFINE_LOCK_GUARD_1(raw_spinlock_irq, raw_spinlock_t,
+		    raw_spin_lock_irq(_T->lock),
+		    raw_spin_unlock_irq(_T->lock))
+
+DEFINE_LOCK_GUARD_1_COND(raw_spinlock_irq, _try, raw_spin_trylock_irq(_T->lock))
+
+DEFINE_LOCK_GUARD_1(raw_spinlock_irqsave, raw_spinlock_t,
+		    raw_spin_lock_irqsave(_T->lock, _T->flags),
+		    raw_spin_unlock_irqrestore(_T->lock, _T->flags),
+		    unsigned long flags)
+
+DEFINE_LOCK_GUARD_1_COND(raw_spinlock_irqsave, _try,
+			 raw_spin_trylock_irqsave(_T->lock, _T->flags))
+
+DEFINE_LOCK_GUARD_1(spinlock, spinlock_t,
+		    spin_lock(_T->lock),
+		    spin_unlock(_T->lock))
+
+DEFINE_LOCK_GUARD_1_COND(spinlock, _try, spin_trylock(_T->lock))
+
+DEFINE_LOCK_GUARD_1(spinlock_irq, spinlock_t,
+		    spin_lock_irq(_T->lock),
+		    spin_unlock_irq(_T->lock))
+
+DEFINE_LOCK_GUARD_1_COND(spinlock_irq, _try,
+			 spin_trylock_irq(_T->lock))
+
+DEFINE_LOCK_GUARD_1(spinlock_irqsave, spinlock_t,
+		    spin_lock_irqsave(_T->lock, _T->flags),
+		    spin_unlock_irqrestore(_T->lock, _T->flags),
+		    unsigned long flags)
+
+DEFINE_LOCK_GUARD_1_COND(spinlock_irqsave, _try,
+			 spin_trylock_irqsave(_T->lock, _T->flags))
+
 #endif /* __LINUX_SPINLOCK_H */
diff --git a/include/linux/srcu.h b/include/linux/srcu.h
index e432cc92c73de7d1ae73aa5b69486e8311547d82..4e1ee9df0aa24e0367a6a237c763e7dc7d49d84e 100644
--- a/include/linux/srcu.h
+++ b/include/linux/srcu.h
@@ -202,4 +202,9 @@ static inline void smp_mb__after_srcu_read_unlock(void)
 	/* __srcu_read_unlock has smp_mb() internally so nothing to do here. */
 }
 
+DEFINE_LOCK_GUARD_1(srcu, struct srcu_struct,
+		    _T->idx = srcu_read_lock(_T->lock),
+		    srcu_read_unlock(_T->lock, _T->idx),
+		    int idx)
+
 #endif
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index d722338bcf148de451341addf84193ed549124bf..e10404f423019d7b6a14d0f86d38a057a06b5c0c 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4307,7 +4307,7 @@ sub process {
 				if|for|while|switch|return|case|
 				volatile|__volatile__|
 				__attribute__|format|__extension__|
-				asm|__asm__)$/x)
+				asm|__asm__|scoped_guard)$/x)
 			{
 			# cpp #define statements have non-optional spaces, ie
 			# if there is a space between the name and the open