net: atm: use DEVICE_ATTR_RO macro

Use DEVICE_ATTR_RO helper instead of plain DEVICE_ATTR,
which makes the code a bit shorter and easier to read.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/atm/atm_sysfs.c

@@ -11,23 +11,23 @@
 
 #define to_atm_dev(cldev) container_of(cldev, struct atm_dev, class_dev)
 
-static ssize_t show_type(struct device *cdev,
+static ssize_t type_show(struct device *cdev,
 			 struct device_attribute *attr, char *buf)
 {
 	struct atm_dev *adev = to_atm_dev(cdev);
 
 	return scnprintf(buf, PAGE_SIZE, "%s\n", adev->type);
 }
 
-static ssize_t show_address(struct device *cdev,
+static ssize_t address_show(struct device *cdev,
 			    struct device_attribute *attr, char *buf)
 {
 	struct atm_dev *adev = to_atm_dev(cdev);
 
 	return scnprintf(buf, PAGE_SIZE, "%pM\n", adev->esi);
 }
 
-static ssize_t show_atmaddress(struct device *cdev,
+static ssize_t atmaddress_show(struct device *cdev,
 			       struct device_attribute *attr, char *buf)
 {
 	unsigned long flags;
@@ -50,15 +50,15 @@ static ssize_t show_atmaddress(struct device *cdev,
 	return count;
 }
 
-static ssize_t show_atmindex(struct device *cdev,
+static ssize_t atmindex_show(struct device *cdev,
 			     struct device_attribute *attr, char *buf)
 {
 	struct atm_dev *adev = to_atm_dev(cdev);
 
 	return scnprintf(buf, PAGE_SIZE, "%d\n", adev->number);
 }
 
-static ssize_t show_carrier(struct device *cdev,
+static ssize_t carrier_show(struct device *cdev,
 			    struct device_attribute *attr, char *buf)
 {
 	struct atm_dev *adev = to_atm_dev(cdev);
@@ -67,7 +67,7 @@ static ssize_t show_carrier(struct device *cdev,
 			 adev->signal == ATM_PHY_SIG_LOST ? 0 : 1);
 }
 
-static ssize_t show_link_rate(struct device *cdev,
+static ssize_t link_rate_show(struct device *cdev,
 			      struct device_attribute *attr, char *buf)
 {
 	struct atm_dev *adev = to_atm_dev(cdev);
@@ -90,12 +90,12 @@ static ssize_t show_link_rate(struct device *cdev,
 	return scnprintf(buf, PAGE_SIZE, "%d\n", link_rate);
 }
 
-static DEVICE_ATTR(address, 0444, show_address, NULL);
-static DEVICE_ATTR(atmaddress, 0444, show_atmaddress, NULL);
-static DEVICE_ATTR(atmindex, 0444, show_atmindex, NULL);
-static DEVICE_ATTR(carrier, 0444, show_carrier, NULL);
-static DEVICE_ATTR(type, 0444, show_type, NULL);
-static DEVICE_ATTR(link_rate, 0444, show_link_rate, NULL);
+static DEVICE_ATTR_RO(address);
+static DEVICE_ATTR_RO(atmaddress);
+static DEVICE_ATTR_RO(atmindex);
+static DEVICE_ATTR_RO(carrier);
+static DEVICE_ATTR_RO(type);
+static DEVICE_ATTR_RO(link_rate);
 
 static struct device_attribute *atm_attrs[] = {
 	&dev_attr_atmaddress,