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

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

2 files changed, 30 insertions, 21 deletions

diff --git a/include/linux/device.h b/include/linux/device.h
index 80a63939f924..3dd9a4081298 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -48,14 +48,22 @@ enum {
 	RESUME_ENABLE,
 };
 
+enum device_state {
+	DEVICE_UNINITIALIZED	= 0,
+	DEVICE_INITIALIZED	= 1,
+	DEVICE_REGISTERED	= 2,
+	DEVICE_GONE		= 3,
+};
+
 struct device;
 struct device_driver;
 struct device_class;
 
 struct bus_type {
 	char			* name;
-	rwlock_t		lock;
+	struct rw_semaphore	rwsem;
 	atomic_t		refcount;
+	u32			present;
 
 	struct list_head	node;
 	struct list_head	devices;
@@ -73,14 +81,9 @@ struct bus_type {
 
 
 extern int bus_register(struct bus_type * bus);
+extern void bus_unregister(struct bus_type * bus);
 
-static inline struct bus_type * get_bus(struct bus_type * bus)
-{
-	BUG_ON(!atomic_read(&bus->refcount));
-	atomic_inc(&bus->refcount);
-	return bus;
-}
-
+extern struct bus_type * get_bus(struct bus_type * bus);
 extern void put_bus(struct bus_type * bus);
 
 extern int bus_for_each_dev(struct bus_type * bus, void * data, 
@@ -114,6 +117,7 @@ struct device_driver {
 
 	rwlock_t		lock;
 	atomic_t		refcount;
+	u32			present;
 
 	struct list_head	bus_list;
 	struct list_head	class_list;
@@ -123,7 +127,7 @@ struct device_driver {
 
 	int	(*probe)	(struct device * dev);
 	int 	(*remove)	(struct device * dev);
-
+	void	(*shutdown)	(struct device * dev);
 	int	(*suspend)	(struct device * dev, u32 state, u32 level);
 	int	(*resume)	(struct device * dev, u32 level);
 
@@ -131,16 +135,10 @@ struct device_driver {
 };
 
 
-
 extern int driver_register(struct device_driver * drv);
+extern void driver_unregister(struct device_driver * drv);
 
-static inline struct device_driver * get_driver(struct device_driver * drv)
-{
-	BUG_ON(!atomic_read(&drv->refcount));
-	atomic_inc(&drv->refcount);
-	return drv;
-}
-
+extern struct device_driver * get_driver(struct device_driver * drv);
 extern void put_driver(struct device_driver * drv);
 extern void remove_driver(struct device_driver * drv);
 
@@ -172,6 +170,11 @@ extern void driver_remove_file(struct device_driver *, struct driver_attribute *
  */
 struct device_class {
 	char			* name;
+	struct rw_semaphore	rwsem;
+
+	atomic_t		refcount;
+	u32			present;
+
 	u32			devnum;
 
 	struct list_head	node;
@@ -189,6 +192,9 @@ struct device_class {
 extern int devclass_register(struct device_class *);
 extern void devclass_unregister(struct device_class *);
 
+extern struct device_class * get_devclass(struct device_class *);
+extern void put_devclass(struct device_class *);
+
 
 struct devclass_attribute {
 	struct attribute	attr;
@@ -289,8 +295,8 @@ struct device {
 	void		*platform_data;	/* Platform specific data (e.g. ACPI,
 					   BIOS data relevant to device) */
 
-	u32		present;
-	u32		current_state;  /* Current operating state. In
+	enum device_state state;
+	u32		power_state;  /* Current operating state. In
 					   ACPI-speak, this is D0-D3, D0
 					   being fully functional, and D3
 					   being off. */
@@ -362,6 +368,11 @@ extern int (*platform_notify)(struct device * dev);
 
 extern int (*platform_notify_remove)(struct device * dev);
 
+static inline int device_present(struct device * dev)
+{
+	return (dev && (dev->state == DEVICE_INITIALIZED || dev->state == DEVICE_REGISTERED));
+}
+
 /* device and bus locking helpers.
  *
  * FIXME: Is there anything else we need to do?
diff --git a/include/linux/driverfs_fs.h b/include/linux/driverfs_fs.h
index d859f8c2e041..b4270e947a1e 100644
--- a/include/linux/driverfs_fs.h
+++ b/include/linux/driverfs_fs.h
@@ -65,6 +65,4 @@ driverfs_create_symlink(struct driver_dir_entry * parent,
 extern void
 driverfs_remove_file(struct driver_dir_entry *, const char * name);
 
-extern int init_driverfs_fs(void);
-
 #endif /* _DDFS_H_ */