Merge osdl.org:/home/mochel/src/kernel/devel/linux-2.5-virgin

into osdl.org:/home/mochel/src/kernel/devel/linux-2.5-core

drivers/base/class.c

@@ -264,8 +264,6 @@ int class_device_add(struct class_device *class_dev)
 		return -EINVAL;
 
 	parent = class_get(class_dev->class);
-	if (class_dev->dev)
-		get_device(class_dev->dev);
 
 	pr_debug("CLASS: registering class device: ID = '%s'\n",
 		 class_dev->class_id);

drivers/base/sys.c

@@ -117,9 +117,16 @@ int sysdev_driver_register(struct sysdev_class * cls,
 			   struct sysdev_driver * drv)
 {
 	down_write(&system_subsys.rwsem);
-	if (cls && kset_get(&cls->kset))
+	if (cls && kset_get(&cls->kset)) {
 		list_add_tail(&drv->entry,&cls->drivers);
-	else
+
+		/* If devices of this class already exist, tell the driver */
+		if (drv->add) {
+			struct sys_device *dev;
+			list_for_each_entry(dev, &cls->kset.list, kobj.entry)
+				drv->add(dev);
+		}
+	} else
 		list_add_tail(&drv->entry,&global_drivers);
 	up_write(&system_subsys.rwsem);
 	return 0;
@@ -136,8 +143,14 @@ void sysdev_driver_unregister(struct sysdev_class * cls,
 {
 	down_write(&system_subsys.rwsem);
 	list_del_init(&drv->entry);
-	if (cls)
+	if (cls) {
+		if (drv->remove) {
+			struct sys_device *dev;
+			list_for_each_entry(dev, &cls->kset.list, kobj.entry)
+				drv->remove(dev);
+		}
 		kset_put(&cls->kset);
+	}
 	up_write(&system_subsys.rwsem);
 }
 
@@ -170,7 +183,7 @@ int sys_device_register(struct sys_device * sysdev)
 	if (!error) {
 		struct sysdev_driver * drv;
 
-		down_read(&system_subsys.rwsem);
+		down_write(&system_subsys.rwsem);
 		/* Generic notification is implicit, because it's that 
 		 * code that should have called us. 
 		 */
@@ -186,7 +199,7 @@ int sys_device_register(struct sys_device * sysdev)
 			if (drv->add)
 				drv->add(sysdev);
 		}
-		up_read(&system_subsys.rwsem);
+		up_write(&system_subsys.rwsem);
 	}
 	return error;
 }
@@ -195,7 +208,7 @@ void sys_device_unregister(struct sys_device * sysdev)
 {
 	struct sysdev_driver * drv;
 
-	down_read(&system_subsys.rwsem);
+	down_write(&system_subsys.rwsem);
 	list_for_each_entry(drv,&global_drivers,entry) {
 		if (drv->remove)
 			drv->remove(sysdev);
@@ -205,7 +218,10 @@ void sys_device_unregister(struct sys_device * sysdev)
 		if (drv->remove)
 			drv->remove(sysdev);
 	}
-	up_read(&system_subsys.rwsem);
+
+	list_del_init(&sysdev->entry);
+
+	up_write(&system_subsys.rwsem);
 
 	kobject_unregister(&sysdev->kobj);
 }

fs/sysfs/bin.c

@@ -22,7 +22,7 @@ fill_read(struct dentry *dentry, char *buffer, loff_t off, size_t count)
 }
 
 static ssize_t
-read(struct file * file, char * userbuf, size_t count, loff_t * off)
+read(struct file * file, char __user * userbuf, size_t count, loff_t * off)
 {
 	char *buffer = file->private_data;
 	struct dentry *dentry = file->f_dentry;
@@ -65,7 +65,7 @@ flush_write(struct dentry *dentry, char *buffer, loff_t offset, size_t count)
 	return attr->write(kobj, buffer, offset, count);
 }
 
-static ssize_t write(struct file * file, const char * userbuf,
+static ssize_t write(struct file * file, const char __user * userbuf,
 		     size_t count, loff_t * off)
 {
 	char *buffer = file->private_data;

fs/sysfs/file.c

@@ -109,7 +109,7 @@ static int fill_read_buffer(struct file * file, struct sysfs_buffer * buffer)
  *	the amount they specify each time.
  *	This may be called continuously until the buffer is empty.
  */
-static int flush_read_buffer(struct sysfs_buffer * buffer, char * buf, 
+static int flush_read_buffer(struct sysfs_buffer * buffer, char __user * buf,
 			     size_t count, loff_t * ppos)
 {
 	int error;
@@ -143,7 +143,7 @@ static int flush_read_buffer(struct sysfs_buffer * buffer, char * buf,
  */
 
 static ssize_t
-sysfs_read_file(struct file *file, char *buf, size_t count, loff_t *ppos)
+sysfs_read_file(struct file *file, char __user *buf, size_t count, loff_t *ppos)
 {
 	struct sysfs_buffer * buffer = file->private_data;
 	ssize_t retval = 0;
@@ -169,7 +169,7 @@ sysfs_read_file(struct file *file, char *buf, size_t count, loff_t *ppos)
  */
 
 static int 
-fill_write_buffer(struct sysfs_buffer * buffer, const char * buf, size_t count)
+fill_write_buffer(struct sysfs_buffer * buffer, const char __user * buf, size_t count)
 {
 	int error;
 
@@ -224,7 +224,7 @@ flush_write_buffer(struct file * file, struct sysfs_buffer * buffer, size_t coun
  */
 
 static ssize_t
-sysfs_write_file(struct file *file, const char *buf, size_t count, loff_t *ppos)
+sysfs_write_file(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
 {
 	struct sysfs_buffer * buffer = file->private_data;
 

include/linux/sysdev.h

@@ -72,6 +72,7 @@ struct sys_device {
 	u32		id;
 	struct sysdev_class	* cls;
 	struct kobject		kobj;
+	struct list_head	entry;
 };
 
 extern int sys_device_register(struct sys_device *);