1 files changed, 36 insertions, 22 deletions

diff --git a/include/linux/device.h b/include/linux/device.h
index f71a78d123ae..d24a47f80f9c 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -16,6 +16,7 @@
 #include <linux/kobject.h>
 #include <linux/klist.h>
 #include <linux/list.h>
+#include <linux/lockdep.h>
 #include <linux/compiler.h>
 #include <linux/types.h>
 #include <linux/module.h>
@@ -24,17 +25,13 @@
 #include <asm/atomic.h>
 #include <asm/device.h>
 
-#define DEVICE_NAME_SIZE        50
-/* DEVICE_NAME_HALF is really less than half to accommodate slop */
-#define DEVICE_NAME_HALF        __stringify(20)
-#define DEVICE_ID_SIZE          32
-#define BUS_ID_SIZE             KOBJ_NAME_LEN
-
+#define BUS_ID_SIZE             20
 
 struct device;
 struct device_driver;
 struct driver_private;
 struct class;
+struct class_private;
 struct bus_type;
 struct bus_type_private;
 
@@ -186,13 +183,9 @@ struct class {
         const char              *name;
         struct module           *owner;
 
-        struct kset             subsys;
-        struct list_head        devices;
-        struct list_head        interfaces;
-        struct kset             class_dirs;
-        struct semaphore        sem; /* locks children, devices, interfaces */
         struct class_attribute          *class_attrs;
         struct device_attribute         *dev_attrs;
+        struct kobject                  *dev_kobj;
 
         int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env);
 
@@ -203,13 +196,28 @@ struct class {
         int (*resume)(struct device *dev);
 
         struct pm_ops *pm;
+        struct class_private *p;
 };
 
-extern int __must_check class_register(struct class *class);
+extern struct kobject *sysfs_dev_block_kobj;
+extern struct kobject *sysfs_dev_char_kobj;
+extern int __must_check __class_register(struct class *class,
+                                         struct lock_class_key *key);
 extern void class_unregister(struct class *class);
-extern int class_for_each_device(struct class *class, void *data,
+
+/* This is a #define to keep the compiler from merging different
+ * instances of the __key variable */
+#define class_register(class)                   \
+({                                              \
+        static struct lock_class_key __key;     \
+        __class_register(class, &__key);        \
+})
+
+extern int class_for_each_device(struct class *class, struct device *start,
+                                 void *data,
                                  int (*fn)(struct device *dev, void *data));
-extern struct device *class_find_device(struct class *class, void *data,
+extern struct device *class_find_device(struct class *class,
+                                        struct device *start, void *data,
                                         int (*match)(struct device *, void *));
 
 struct class_attribute {
@@ -237,9 +245,19 @@ struct class_interface {
 extern int __must_check class_interface_register(struct class_interface *);
 extern void class_interface_unregister(struct class_interface *);
 
-extern struct class *class_create(struct module *owner, const char *name);
+extern struct class * __must_check __class_create(struct module *owner,
+                                                  const char *name,
+                                                  struct lock_class_key *key);
 extern void class_destroy(struct class *cls);
 
+/* This is a #define to keep the compiler from merging different
+ * instances of the __key variable */
+#define class_create(owner, name)               \
+({                                              \
+        static struct lock_class_key __key;     \
+        __class_create(owner, name, &__key);    \
+})
+
 /*
  * The type of device, "struct device" is embedded in. A class
  * or bus can contain devices of different types
@@ -468,14 +486,10 @@ extern struct device *device_create_vargs(struct class *cls,
                                           const char *fmt,
                                           va_list vargs);
 extern struct device *device_create(struct class *cls, struct device *parent,
-                                    dev_t devt, const char *fmt, ...)
-                                    __attribute__((format(printf, 4, 5)));
-extern struct device *device_create_drvdata(struct class *cls,
-                                            struct device *parent,
-                                            dev_t devt,
-                                            void *drvdata,
-                                            const char *fmt, ...)
+                                    dev_t devt, void *drvdata,
+                                    const char *fmt, ...)
                                     __attribute__((format(printf, 5, 6)));
+#define device_create_drvdata   device_create
 extern void device_destroy(struct class *cls, dev_t devt);
 
 /*