[PATCH] Driver core: change device_attribute callbacks

This patch adds the device_attribute paramerter to the
device_attribute store and show sysfs callback functions, and passes a
reference to the attribute when the callbacks are called.
Signed-off-by: NYani Ioannou <yani.ioannou@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/base/core.c

@@ -39,7 +39,7 @@ dev_attr_show(struct kobject * kobj, struct attribute * attr, char * buf)
 	ssize_t ret = -EIO;
 
 	if (dev_attr->show)
-		ret = dev_attr->show(dev, buf);
+		ret = dev_attr->show(dev, dev_attr, buf);
 	return ret;
 }
 
@@ -52,7 +52,7 @@ dev_attr_store(struct kobject * kobj, struct attribute * attr,
 	ssize_t ret = -EIO;
 
 	if (dev_attr->store)
-		ret = dev_attr->store(dev, buf, count);
+		ret = dev_attr->store(dev, dev_attr, buf, count);
 	return ret;
 }
 

include/linux/device.h

@@ -335,8 +335,10 @@ extern void driver_attach(struct device_driver * drv);
 
 struct device_attribute {
 	struct attribute	attr;
-	ssize_t (*show)(struct device * dev, char * buf);
-	ssize_t (*store)(struct device * dev, const char * buf, size_t count);
+	ssize_t (*show)(struct device *dev, struct device_attribute *attr,
+			char *buf);
+	ssize_t (*store)(struct device *dev, struct device_attribute *attr,
+			 const char *buf, size_t count);
 };
 
 #define DEVICE_ATTR(_name,_mode,_show,_store) \