nfsd: common grace period control

[~andy/linux] / include / linux / device.h

diff --git a/include/linux/device.h b/include/linux/device.h
index b0556082179bf165128102f5bbbe1fc6e89a23df..4d8372d135df8df6d4f648b009faaa5d4d315538 100644 (file)
--- 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>
@@ -24,12 +25,7 @@
 #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;
@@ -205,8 +201,18 @@ struct class {
 
 extern struct kobject *sysfs_dev_block_kobj;
 extern struct kobject *sysfs_dev_char_kobj;
-extern int __must_check class_register(struct class *class);
+extern int __must_check __class_register(struct class *class,
+                                        struct lock_class_key *key);
 extern void class_unregister(struct class *class);
+
+/* 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));
@@ -239,9 +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
@@ -342,6 +358,7 @@ struct device {
 
        struct kobject kobj;
        char    bus_id[BUS_ID_SIZE];    /* position on parent bus */
+       const char              *init_name; /* initial name of the device */
        struct device_type      *type;
        unsigned                uevent_suppress:1;
 
@@ -390,7 +407,7 @@ struct device {
 /* Get the wakeup routines, which depend on struct device */
 #include <linux/pm_wakeup.h>
 
-static inline const char *dev_name(struct device *dev)
+static inline const char *dev_name(const struct device *dev)
 {
        /* will be changed into kobject_name(&dev->kobj) in the near future */
        return dev->bus_id;
@@ -502,7 +519,7 @@ extern void device_shutdown(void);
 extern void sysdev_shutdown(void);
 
 /* debugging and troubleshooting/diagnostic helpers. */
-extern const char *dev_driver_string(struct device *dev);
+extern const char *dev_driver_string(const struct device *dev);
 #define dev_printk(level, dev, format, arg...) \
        printk(level "%s %s: " format , dev_driver_string(dev) , \
               dev_name(dev) , ## arg)