Merge branch 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git...

* 'driver-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6:
  driver core: Document that device_rename() is only for networking
  sysfs: remove useless test from sysfs_merge_group
  driver-core: merge private parts of class and bus
  driver core: fix whitespace in class_attr_string

diff --git a/drivers/base/base.h b/drivers/base/base.h
index 2ca7f5b7b824696152e017da894d69fd894c52b5..19f49e41ce5de2ceb37adb1a278fa786ffa54391 100644 (file)
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -1,31 +1,46 @@
 
 /**
- * struct bus_type_private - structure to hold the private to the driver core portions of the bus_type structure.
+ * struct subsys_private - structure to hold the private to the driver core portions of the bus_type/class structure.
  *
- * @subsys - the struct kset that defines this bus.  This is the main kobject
- * @drivers_kset - the list of drivers associated with this bus
- * @devices_kset - the list of devices associated with this bus
+ * @subsys - the struct kset that defines this subsystem
+ * @devices_kset - the list of devices associated
+ *
+ * @drivers_kset - the list of drivers associated
  * @klist_devices - the klist to iterate over the @devices_kset
  * @klist_drivers - the klist to iterate over the @drivers_kset
  * @bus_notifier - the bus notifier list for anything that cares about things
- * on this bus.
+ *                 on this bus.
  * @bus - pointer back to the struct bus_type that this structure is associated
- * with.
+ *        with.
+ *
+ * @class_interfaces - list of class_interfaces associated
+ * @glue_dirs - "glue" directory to put in-between the parent device to
+ *              avoid namespace conflicts
+ * @class_mutex - mutex to protect the children, devices, and interfaces lists.
+ * @class - pointer back to the struct class that this structure is associated
+ *          with.
  *
  * This structure is the one that is the actual kobject allowing struct
- * bus_type to be statically allocated safely.  Nothing outside of the driver
- * core should ever touch these fields.
+ * bus_type/class to be statically allocated safely.  Nothing outside of the
+ * driver core should ever touch these fields.
  */
-struct bus_type_private {
+struct subsys_private {
        struct kset subsys;
-       struct kset *drivers_kset;
        struct kset *devices_kset;
+
+       struct kset *drivers_kset;
        struct klist klist_devices;
        struct klist klist_drivers;
        struct blocking_notifier_head bus_notifier;
        unsigned int drivers_autoprobe:1;
        struct bus_type *bus;
+
+       struct list_head class_interfaces;
+       struct kset glue_dirs;
+       struct mutex class_mutex;
+       struct class *class;
 };
+#define to_subsys_private(obj) container_of(obj, struct subsys_private, subsys.kobj)
 
 struct driver_private {
        struct kobject kobj;
@@ -36,33 +51,6 @@ struct driver_private {
 };
 #define to_driver(obj) container_of(obj, struct driver_private, kobj)
 
-
-/**
- * struct class_private - structure to hold the private to the driver core portions of the class structure.
- *
- * @class_subsys - the struct kset that defines this class.  This is the main kobject
- * @class_devices - list of devices associated with this class
- * @class_interfaces - list of class_interfaces associated with this class
- * @class_dirs - "glue" directory for virtual devices associated with this class
- * @class_mutex - mutex to protect the children, devices, and interfaces lists.
- * @class - pointer back to the struct class that this structure is associated
- * with.
- *
- * This structure is the one that is the actual kobject allowing struct
- * class to be statically allocated safely.  Nothing outside of the driver
- * core should ever touch these fields.
- */
-struct class_private {
-       struct kset class_subsys;
-       struct klist class_devices;
-       struct list_head class_interfaces;
-       struct kset class_dirs;
-       struct mutex class_mutex;
-       struct class *class;
-};
-#define to_class(obj)  \
-       container_of(obj, struct class_private, class_subsys.kobj)
-
 /**
  * struct device_private - structure to hold the private to the driver core portions of the device structure.
  *

diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 33c270a64db708d62f0c759110109acdb64751cc..e243bd49764b8c6df1d5bfcf873fc0d0652d52cb 100644 (file)
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -20,7 +20,6 @@
 #include "power/power.h"
 
 #define to_bus_attr(_attr) container_of(_attr, struct bus_attribute, attr)
-#define to_bus(obj) container_of(obj, struct bus_type_private, subsys.kobj)
 
 /*
  * sysfs bindings for drivers
@@ -96,11 +95,11 @@ static ssize_t bus_attr_show(struct kobject *kobj, struct attribute *attr,
                             char *buf)
 {
        struct bus_attribute *bus_attr = to_bus_attr(attr);
-       struct bus_type_private *bus_priv = to_bus(kobj);
+       struct subsys_private *subsys_priv = to_subsys_private(kobj);
        ssize_t ret = 0;
 
        if (bus_attr->show)
-               ret = bus_attr->show(bus_priv->bus, buf);
+               ret = bus_attr->show(subsys_priv->bus, buf);
        return ret;
 }
 
@@ -108,11 +107,11 @@ static ssize_t bus_attr_store(struct kobject *kobj, struct attribute *attr,
                              const char *buf, size_t count)
 {
        struct bus_attribute *bus_attr = to_bus_attr(attr);
-       struct bus_type_private *bus_priv = to_bus(kobj);
+       struct subsys_private *subsys_priv = to_subsys_private(kobj);
        ssize_t ret = 0;
 
        if (bus_attr->store)
-               ret = bus_attr->store(bus_priv->bus, buf, count);
+               ret = bus_attr->store(subsys_priv->bus, buf, count);
        return ret;
 }
 
@@ -858,9 +857,9 @@ static BUS_ATTR(uevent, S_IWUSR, NULL, bus_uevent_store);
 int bus_register(struct bus_type *bus)
 {
        int retval;
-       struct bus_type_private *priv;
+       struct subsys_private *priv;
 
-       priv = kzalloc(sizeof(struct bus_type_private), GFP_KERNEL);
+       priv = kzalloc(sizeof(struct subsys_private), GFP_KERNEL);
        if (!priv)
                return -ENOMEM;
 

diff --git a/drivers/base/class.c b/drivers/base/class.c
index 9c63a5687d694345bc80676238ffda81d7087256..4f1df2e8fd744b837552e5cea24c14499086cb88 100644 (file)
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -27,7 +27,7 @@ static ssize_t class_attr_show(struct kobject *kobj, struct attribute *attr,
                               char *buf)
 {
        struct class_attribute *class_attr = to_class_attr(attr);
-       struct class_private *cp = to_class(kobj);
+       struct subsys_private *cp = to_subsys_private(kobj);
        ssize_t ret = -EIO;
 
        if (class_attr->show)
@@ -39,7 +39,7 @@ static ssize_t class_attr_store(struct kobject *kobj, struct attribute *attr,
                                const char *buf, size_t count)
 {
        struct class_attribute *class_attr = to_class_attr(attr);
-       struct class_private *cp = to_class(kobj);
+       struct subsys_private *cp = to_subsys_private(kobj);
        ssize_t ret = -EIO;
 
        if (class_attr->store)
@@ -49,7 +49,7 @@ static ssize_t class_attr_store(struct kobject *kobj, struct attribute *attr,
 
 static void class_release(struct kobject *kobj)
 {
-       struct class_private *cp = to_class(kobj);
+       struct subsys_private *cp = to_subsys_private(kobj);
        struct class *class = cp->class;
 
        pr_debug("class '%s': release.\n", class->name);
@@ -65,7 +65,7 @@ static void class_release(struct kobject *kobj)
 
 static const struct kobj_ns_type_operations *class_child_ns_type(struct kobject *kobj)
 {
-       struct class_private *cp = to_class(kobj);
+       struct subsys_private *cp = to_subsys_private(kobj);
        struct class *class = cp->class;
 
        return class->ns_type;
@@ -82,7 +82,7 @@ static struct kobj_type class_ktype = {
        .child_ns_type  = class_child_ns_type,
 };
 
-/* Hotplug events for classes go to the class class_subsys */
+/* Hotplug events for classes go to the class subsys */
 static struct kset *class_kset;
 
 
@@ -90,7 +90,7 @@ int class_create_file(struct class *cls, const struct class_attribute *attr)
 {
        int error;
        if (cls)
-               error = sysfs_create_file(&cls->p->class_subsys.kobj,
+               error = sysfs_create_file(&cls->p->subsys.kobj,
                                          &attr->attr);
        else
                error = -EINVAL;
@@ -100,20 +100,20 @@ int class_create_file(struct class *cls, const struct class_attribute *attr)
 void class_remove_file(struct class *cls, const struct class_attribute *attr)
 {
        if (cls)
-               sysfs_remove_file(&cls->p->class_subsys.kobj, &attr->attr);
+               sysfs_remove_file(&cls->p->subsys.kobj, &attr->attr);
 }
 
 static struct class *class_get(struct class *cls)
 {
        if (cls)
-               kset_get(&cls->p->class_subsys);
+               kset_get(&cls->p->subsys);
        return cls;
 }
 
 static void class_put(struct class *cls)
 {
        if (cls)
-               kset_put(&cls->p->class_subsys);
+               kset_put(&cls->p->subsys);
 }
 
 static int add_class_attrs(struct class *cls)
@@ -162,7 +162,7 @@ static void klist_class_dev_put(struct klist_node *n)
 
 int __class_register(struct class *cls, struct lock_class_key *key)
 {
-       struct class_private *cp;
+       struct subsys_private *cp;
        int error;
 
        pr_debug("device class '%s': registering\n", cls->name);
@@ -170,11 +170,11 @@ int __class_register(struct class *cls, struct lock_class_key *key)
        cp = kzalloc(sizeof(*cp), GFP_KERNEL);
        if (!cp)
                return -ENOMEM;
-       klist_init(&cp->class_devices, klist_class_dev_get, klist_class_dev_put);
+       klist_init(&cp->klist_devices, klist_class_dev_get, klist_class_dev_put);
        INIT_LIST_HEAD(&cp->class_interfaces);
-       kset_init(&cp->class_dirs);
+       kset_init(&cp->glue_dirs);
        __mutex_init(&cp->class_mutex, "struct class mutex", key);
-       error = kobject_set_name(&cp->class_subsys.kobj, "%s", cls->name);
+       error = kobject_set_name(&cp->subsys.kobj, "%s", cls->name);
        if (error) {
                kfree(cp);
                return error;
@@ -187,15 +187,15 @@ int __class_register(struct class *cls, struct lock_class_key *key)
 #if defined(CONFIG_BLOCK)
        /* let the block class directory show up in the root of sysfs */
        if (!sysfs_deprecated || cls != &block_class)
-               cp->class_subsys.kobj.kset = class_kset;
+               cp->subsys.kobj.kset = class_kset;
 #else
-       cp->class_subsys.kobj.kset = class_kset;
+       cp->subsys.kobj.kset = class_kset;
 #endif
-       cp->class_subsys.kobj.ktype = &class_ktype;
+       cp->subsys.kobj.ktype = &class_ktype;
        cp->class = cls;
        cls->p = cp;
 
-       error = kset_register(&cp->class_subsys);
+       error = kset_register(&cp->subsys);
        if (error) {
                kfree(cp);
                return error;
@@ -210,7 +210,7 @@ void class_unregister(struct class *cls)
 {
        pr_debug("device class '%s': unregistering\n", cls->name);
        remove_class_attrs(cls);
-       kset_unregister(&cls->p->class_subsys);
+       kset_unregister(&cls->p->subsys);
 }
 
 static void class_create_release(struct class *cls)
@@ -295,7 +295,7 @@ void class_dev_iter_init(struct class_dev_iter *iter, struct class *class,
 
        if (start)
                start_knode = &start->knode_class;
-       klist_iter_init_node(&class->p->class_devices, &iter->ki, start_knode);
+       klist_iter_init_node(&class->p->klist_devices, &iter->ki, start_knode);
        iter->type = type;
 }
 EXPORT_SYMBOL_GPL(class_dev_iter_init);
@@ -482,8 +482,8 @@ void class_interface_unregister(struct class_interface *class_intf)
        class_put(parent);
 }
 
-ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr,
-                               char *buf)
+ssize_t show_class_attr_string(struct class *class,
+                              struct class_attribute *attr, char *buf)
 {
        struct class_attribute_string *cs;
        cs = container_of(attr, struct class_attribute_string, attr);

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 7613592615896d40715831fe2ae436ecf1db1cdd..080e9ca11017f721d4033dabd33329dcc1d17a9e 100644 (file)
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -647,7 +647,7 @@ class_dir_create_and_add(struct class *class, struct kobject *parent_kobj)
        dir->class = class;
        kobject_init(&dir->kobj, &class_dir_ktype);
 
-       dir->kobj.kset = &class->p->class_dirs;
+       dir->kobj.kset = &class->p->glue_dirs;
 
        retval = kobject_add(&dir->kobj, parent_kobj, "%s", class->name);
        if (retval < 0) {
@@ -672,7 +672,7 @@ static struct kobject *get_device_parent(struct device *dev,
                if (sysfs_deprecated && dev->class == &block_class) {
                        if (parent && parent->class == &block_class)
                                return &parent->kobj;
-                       return &block_class.p->class_subsys.kobj;
+                       return &block_class.p->subsys.kobj;
                }
 #endif
 
@@ -691,13 +691,13 @@ static struct kobject *get_device_parent(struct device *dev,
                mutex_lock(&gdp_mutex);
 
                /* find our class-directory at the parent and reference it */
-               spin_lock(&dev->class->p->class_dirs.list_lock);
-               list_for_each_entry(k, &dev->class->p->class_dirs.list, entry)
+               spin_lock(&dev->class->p->glue_dirs.list_lock);
+               list_for_each_entry(k, &dev->class->p->glue_dirs.list, entry)
                        if (k->parent == parent_kobj) {
                                kobj = kobject_get(k);
                                break;
                        }
-               spin_unlock(&dev->class->p->class_dirs.list_lock);
+               spin_unlock(&dev->class->p->glue_dirs.list_lock);
                if (kobj) {
                        mutex_unlock(&gdp_mutex);
                        return kobj;
@@ -719,7 +719,7 @@ static void cleanup_glue_dir(struct device *dev, struct kobject *glue_dir)
 {
        /* see if we live in a "glue" directory */
        if (!glue_dir || !dev->class ||
-           glue_dir->kset != &dev->class->p->class_dirs)
+           glue_dir->kset != &dev->class->p->glue_dirs)
                return;
 
        kobject_put(glue_dir);
@@ -746,7 +746,7 @@ static int device_add_class_symlinks(struct device *dev)
                return 0;
 
        error = sysfs_create_link(&dev->kobj,
-                                 &dev->class->p->class_subsys.kobj,
+                                 &dev->class->p->subsys.kobj,
                                  "subsystem");
        if (error)
                goto out;
@@ -765,7 +765,7 @@ static int device_add_class_symlinks(struct device *dev)
 #endif
 
        /* link in the class directory pointing to the device */
-       error = sysfs_create_link(&dev->class->p->class_subsys.kobj,
+       error = sysfs_create_link(&dev->class->p->subsys.kobj,
                                  &dev->kobj, dev_name(dev));
        if (error)
                goto out_device;
@@ -793,7 +793,7 @@ static void device_remove_class_symlinks(struct device *dev)
        if (sysfs_deprecated && dev->class == &block_class)
                return;
 #endif
-       sysfs_delete_link(&dev->class->p->class_subsys.kobj, &dev->kobj, dev_name(dev));
+       sysfs_delete_link(&dev->class->p->subsys.kobj, &dev->kobj, dev_name(dev));
 }
 
 /**
@@ -984,7 +984,7 @@ int device_add(struct device *dev)
                mutex_lock(&dev->class->p->class_mutex);
                /* tie the class to the device */
                klist_add_tail(&dev->knode_class,
-                              &dev->class->p->class_devices);
+                              &dev->class->p->klist_devices);
 
                /* notify any interfaces that the device is here */
                list_for_each_entry(class_intf,
@@ -1550,6 +1550,8 @@ EXPORT_SYMBOL_GPL(device_destroy);
  * exclusion between two different calls of device_rename
  * on the same device to ensure that new_name is valid and
  * won't conflict with other devices.
+ *
+ * "Never use this function, bad things will happen" - gregkh
  */
 int device_rename(struct device *dev, const char *new_name)
 {
@@ -1572,7 +1574,7 @@ int device_rename(struct device *dev, const char *new_name)
        }
 
        if (dev->class) {
-               error = sysfs_rename_link(&dev->class->p->class_subsys.kobj,
+               error = sysfs_rename_link(&dev->class->p->subsys.kobj,
                        &dev->kobj, old_device_name, new_name);
                if (error)
                        goto out;

diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index 442f34ff1af80178ee63e9a7d8ae2abe3df6154e..c8769dc222d88a2a908b36eec4a98a959b1f63d5 100644 (file)
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -165,10 +165,7 @@ int sysfs_merge_group(struct kobject *kobj,
        struct attribute *const *attr;
        int i;
 
-       if (grp)
-               dir_sd = sysfs_get_dirent(kobj->sd, NULL, grp->name);
-       else
-               dir_sd = sysfs_get(kobj->sd);
+       dir_sd = sysfs_get_dirent(kobj->sd, NULL, grp->name);
        if (!dir_sd)
                return -ENOENT;
 
@@ -195,10 +192,7 @@ void sysfs_unmerge_group(struct kobject *kobj,
        struct sysfs_dirent *dir_sd;
        struct attribute *const *attr;
 
-       if (grp)
-               dir_sd = sysfs_get_dirent(kobj->sd, NULL, grp->name);
-       else
-               dir_sd = sysfs_get(kobj->sd);
+       dir_sd = sysfs_get_dirent(kobj->sd, NULL, grp->name);
        if (dir_sd) {
                for (attr = grp->attrs; *attr; ++attr)
                        sysfs_hash_and_remove(dir_sd, NULL, (*attr)->name);

diff --git a/include/linux/device.h b/include/linux/device.h
index d96af9701d60b7104066ef4cbf1487aeff10daf5..1bf5cf0b45131015a857b0194a6b79f226e6dadd 100644 (file)
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -30,9 +30,8 @@ struct device_private;
 struct device_driver;
 struct driver_private;
 struct class;
-struct class_private;
+struct subsys_private;
 struct bus_type;
-struct bus_type_private;
 struct device_node;
 
 struct bus_attribute {
@@ -65,7 +64,7 @@ struct bus_type {
 
        const struct dev_pm_ops *pm;
 
-       struct bus_type_private *p;
+       struct subsys_private *p;
 };
 
 extern int __must_check bus_register(struct bus_type *bus);
@@ -214,7 +213,7 @@ struct class {
 
        const struct dev_pm_ops *pm;
 
-       struct class_private *p;
+       struct subsys_private *p;
 };
 
 struct class_dev_iter {