Merge branch 'linux-next' of git://git.infradead.org/~dedekind/ubi-2.6

15 files changed, 1276 insertions, 357 deletions

diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index d7da109c24fd..6318f6b57360 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -27,13 +27,78 @@ config PREVENT_FIRMWARE_BUILD
           If unsure say Y here.
 
 config FW_LOADER
-        tristate "Userspace firmware loading support"
+        tristate "Userspace firmware loading support" if EMBEDDED
         depends on HOTPLUG
+        default y
         ---help---
           This option is provided for the case where no in-kernel-tree modules
           require userspace firmware loading support, but a module built outside
           the kernel tree does.
 
+config FIRMWARE_IN_KERNEL
+        bool "Include in-kernel firmware blobs in kernel binary"
+        depends on FW_LOADER
+        default y
+        help
+          The kernel source tree includes a number of firmware 'blobs'
+          which are used by various drivers. The recommended way to
+          use these is to run "make firmware_install" and to copy the
+          resulting binary files created in usr/lib/firmware directory
+          of the kernel tree to the /lib/firmware on your system so
+          that they can be loaded by userspace helpers on request.
+
+          Enabling this option will build each required firmware blob
+          into the kernel directly, where request_firmware() will find
+          them without having to call out to userspace. This may be
+          useful if your root file system requires a device which uses
+          such firmware, and do not wish to use an initrd.
+
+          This single option controls the inclusion of firmware for
+          every driver which usees request_firmare() and ships its
+          firmware in the kernel source tree, to avoid a proliferation
+          of 'Include firmware for xxx device' options.
+
+          Say 'N' and let firmware be loaded from userspace.
+
+config EXTRA_FIRMWARE
+        string "External firmware blobs to build into the kernel binary"
+        depends on FW_LOADER
+        help
+          This option allows firmware to be built into the kernel, for the
+          cases where the user either cannot or doesn't want to provide it from
+          userspace at runtime (for example, when the firmware in question is
+          required for accessing the boot device, and the user doesn't want to
+          use an initrd).
+
+          This option is a string, and takes the (space-separated) names of the
+          firmware files -- the same names which appear in MODULE_FIRMWARE()
+          and request_firmware() in the source. These files should exist under
+          the directory specified by the EXTRA_FIRMWARE_DIR option, which is
+          by default the firmware/ subdirectory of the kernel source tree.
+
+          So, for example, you might set CONFIG_EXTRA_FIRMWARE="usb8388.bin",
+          copy the usb8388.bin file into the firmware/ directory, and build the
+          kernel. Then any request_firmware("usb8388.bin") will be
+          satisfied internally without needing to call out to userspace.
+
+          WARNING: If you include additional firmware files into your binary
+          kernel image which are not available under the terms of the GPL,
+          then it may be a violation of the GPL to distribute the resulting
+          image -- since it combines both GPL and non-GPL work. You should
+          consult a lawyer of your own before distributing such an image.
+
+config EXTRA_FIRMWARE_DIR
+        string "Firmware blobs root directory"
+        depends on EXTRA_FIRMWARE != ""
+        default "firmware"
+        help
+          This option controls the directory in which the kernel build system
+          looks for the firmware files listed in the EXTRA_FIRMWARE option.
+          The default is the firmware/ directory in the kernel source tree,
+          but by changing this option you can point it elsewhere, such as
+          the /lib/firmware/ directory or another separate directory
+          containing firmware files.
+
 config DEBUG_DRIVER
         bool "Driver Core verbose debug messages"
         depends on DEBUG_KERNEL
diff --git a/drivers/base/base.h b/drivers/base/base.h
index 2c9ae43e2219..31dc0cd84afa 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -36,6 +36,33 @@ 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 list_head 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)
+
 /* initialisation functions */
 extern int devices_init(void);
 extern int buses_init(void);
diff --git a/drivers/base/class.c b/drivers/base/class.c
index e085af0ff94f..839d27cecb36 100644
--- a/drivers/base/class.c
+++ b/drivers/base/class.c
@@ -18,20 +18,20 @@
 #include <linux/err.h>
 #include <linux/slab.h>
 #include <linux/genhd.h>
+#include <linux/mutex.h>
 #include "base.h"
 
 #define to_class_attr(_attr) container_of(_attr, struct class_attribute, attr)
-#define to_class(obj) container_of(obj, struct class, subsys.kobj)
 
 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 *dc = to_class(kobj);
+        struct class_private *cp = to_class(kobj);
         ssize_t ret = -EIO;
 
         if (class_attr->show)
-                ret = class_attr->show(dc, buf);
+                ret = class_attr->show(cp->class, buf);
         return ret;
 }
 
@@ -39,17 +39,18 @@ 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 *dc = to_class(kobj);
+        struct class_private *cp = to_class(kobj);
         ssize_t ret = -EIO;
 
         if (class_attr->store)
-                ret = class_attr->store(dc, buf, count);
+                ret = class_attr->store(cp->class, buf, count);
         return ret;
 }
 
 static void class_release(struct kobject *kobj)
 {
-        struct class *class = to_class(kobj);
+        struct class_private *cp = to_class(kobj);
+        struct class *class = cp->class;
 
         pr_debug("class '%s': release.\n", class->name);
 
@@ -70,7 +71,7 @@ static struct kobj_type class_ktype = {
         .release        = class_release,
 };
 
-/* Hotplug events for classes go to the class_obj subsys */
+/* Hotplug events for classes go to the class class_subsys */
 static struct kset *class_kset;
 
 
@@ -78,7 +79,8 @@ int class_create_file(struct class *cls, const struct class_attribute *attr)
 {
         int error;
         if (cls)
-                error = sysfs_create_file(&cls->subsys.kobj, &attr->attr);
+                error = sysfs_create_file(&cls->p->class_subsys.kobj,
+                                          &attr->attr);
         else
                 error = -EINVAL;
         return error;
@@ -87,21 +89,20 @@ 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->subsys.kobj, &attr->attr);
+                sysfs_remove_file(&cls->p->class_subsys.kobj, &attr->attr);
 }
 
 static struct class *class_get(struct class *cls)
 {
         if (cls)
-                return container_of(kset_get(&cls->subsys),
-                                    struct class, subsys);
-        return NULL;
+                kset_get(&cls->p->class_subsys);
+        return cls;
 }
 
 static void class_put(struct class *cls)
 {
         if (cls)
-                kset_put(&cls->subsys);
+                kset_put(&cls->p->class_subsys);
 }
 
 static int add_class_attrs(struct class *cls)
@@ -134,42 +135,57 @@ static void remove_class_attrs(struct class *cls)
         }
 }
 
-int class_register(struct class *cls)
+int __class_register(struct class *cls, struct lock_class_key *key)
 {
+        struct class_private *cp;
         int error;
 
         pr_debug("device class '%s': registering\n", cls->name);
 
-        INIT_LIST_HEAD(&cls->devices);
-        INIT_LIST_HEAD(&cls->interfaces);
-        kset_init(&cls->class_dirs);
-        init_MUTEX(&cls->sem);
-        error = kobject_set_name(&cls->subsys.kobj, "%s", cls->name);
-        if (error)
+        cp = kzalloc(sizeof(*cp), GFP_KERNEL);
+        if (!cp)
+                return -ENOMEM;
+        INIT_LIST_HEAD(&cp->class_devices);
+        INIT_LIST_HEAD(&cp->class_interfaces);
+        kset_init(&cp->class_dirs);
+        __mutex_init(&cp->class_mutex, "struct class mutex", key);
+        error = kobject_set_name(&cp->class_subsys.kobj, "%s", cls->name);
+        if (error) {
+                kfree(cp);
                 return error;
+        }
+
+        /* set the default /sys/dev directory for devices of this class */
+        if (!cls->dev_kobj)
+                cls->dev_kobj = sysfs_dev_char_kobj;
 
 #if defined(CONFIG_SYSFS_DEPRECATED) && defined(CONFIG_BLOCK)
         /* let the block class directory show up in the root of sysfs */
         if (cls != &block_class)
-                cls->subsys.kobj.kset = class_kset;
+                cp->class_subsys.kobj.kset = class_kset;
 #else
-        cls->subsys.kobj.kset = class_kset;
+        cp->class_subsys.kobj.kset = class_kset;
 #endif
-        cls->subsys.kobj.ktype = &class_ktype;
+        cp->class_subsys.kobj.ktype = &class_ktype;
+        cp->class = cls;
+        cls->p = cp;
 
-        error = kset_register(&cls->subsys);
-        if (!error) {
-                error = add_class_attrs(class_get(cls));
-                class_put(cls);
+        error = kset_register(&cp->class_subsys);
+        if (error) {
+                kfree(cp);
+                return error;
         }
+        error = add_class_attrs(class_get(cls));
+        class_put(cls);
         return error;
 }
+EXPORT_SYMBOL_GPL(__class_register);
 
 void class_unregister(struct class *cls)
 {
         pr_debug("device class '%s': unregistering\n", cls->name);
         remove_class_attrs(cls);
-        kset_unregister(&cls->subsys);
+        kset_unregister(&cls->p->class_subsys);
 }
 
 static void class_create_release(struct class *cls)
@@ -189,7 +205,8 @@ static void class_create_release(struct class *cls)
  * Note, the pointer created here is to be destroyed when finished by
  * making a call to class_destroy().
  */
-struct class *class_create(struct module *owner, const char *name)
+struct class *__class_create(struct module *owner, const char *name,
+                             struct lock_class_key *key)
 {
         struct class *cls;
         int retval;
@@ -204,7 +221,7 @@ struct class *class_create(struct module *owner, const char *name)
         cls->owner = owner;
         cls->class_release = class_create_release;
 
-        retval = class_register(cls);
+        retval = __class_register(cls, key);
         if (retval)
                 goto error;
 
@@ -214,6 +231,7 @@ error:
         kfree(cls);
         return ERR_PTR(retval);
 }
+EXPORT_SYMBOL_GPL(__class_create);
 
 /**
  * class_destroy - destroys a struct class structure
@@ -252,39 +270,44 @@ char *make_class_name(const char *name, struct kobject *kobj)
 /**
  * class_for_each_device - device iterator
  * @class: the class we're iterating
+ * @start: the device to start with in the list, if any.
  * @data: data for the callback
  * @fn: function to be called for each device
  *
  * Iterate over @class's list of devices, and call @fn for each,
- * passing it @data.
+ * passing it @data.  If @start is set, the list iteration will start
+ * there, otherwise if it is NULL, the iteration starts at the
+ * beginning of the list.
  *
  * We check the return of @fn each time. If it returns anything
  * other than 0, we break out and return that value.
  *
- * Note, we hold class->sem in this function, so it can not be
+ * Note, we hold class->class_mutex in this function, so it can not be
  * re-acquired in @fn, otherwise it will self-deadlocking. For
  * example, calls to add or remove class members would be verboten.
  */
-int class_for_each_device(struct class *class, void *data,
-                           int (*fn)(struct device *, void *))
+int class_for_each_device(struct class *class, struct device *start,
+                          void *data, int (*fn)(struct device *, void *))
 {
         struct device *dev;
         int error = 0;
 
         if (!class)
                 return -EINVAL;
-        down(&class->sem);
-        list_for_each_entry(dev, &class->devices, node) {
+        mutex_lock(&class->p->class_mutex);
+        list_for_each_entry(dev, &class->p->class_devices, node) {
+                if (start) {
+                        if (start == dev)
+                                start = NULL;
+                        continue;
+                }
                 dev = get_device(dev);
-                if (dev) {
-                        error = fn(dev, data);
-                        put_device(dev);
-                } else
-                        error = -ENODEV;
+                error = fn(dev, data);
+                put_device(dev);
                 if (error)
                         break;
         }
-        up(&class->sem);
+        mutex_unlock(&class->p->class_mutex);
 
         return error;
 }
@@ -293,6 +316,7 @@ EXPORT_SYMBOL_GPL(class_for_each_device);
 /**
  * class_find_device - device iterator for locating a particular device
  * @class: the class we're iterating
+ * @start: Device to begin with
  * @data: data for the match function
  * @match: function to check device
  *
@@ -306,12 +330,13 @@ EXPORT_SYMBOL_GPL(class_for_each_device);
  *
  * Note, you will need to drop the reference with put_device() after use.
  *
- * We hold class->sem in this function, so it can not be
+ * We hold class->class_mutex in this function, so it can not be
  * re-acquired in @match, otherwise it will self-deadlocking. For
  * example, calls to add or remove class members would be verboten.
  */
-struct device *class_find_device(struct class *class, void *data,
-                                   int (*match)(struct device *, void *))
+struct device *class_find_device(struct class *class, struct device *start,
+                                 void *data,
+                                 int (*match)(struct device *, void *))
 {
         struct device *dev;
         int found = 0;
@@ -319,19 +344,21 @@ struct device *class_find_device(struct class *class, void *data,
         if (!class)
                 return NULL;
 
-        down(&class->sem);
-        list_for_each_entry(dev, &class->devices, node) {
+        mutex_lock(&class->p->class_mutex);
+        list_for_each_entry(dev, &class->p->class_devices, node) {
+                if (start) {
+                        if (start == dev)
+                                start = NULL;
+                        continue;
+                }
                 dev = get_device(dev);
-                if (dev) {
-                        if (match(dev, data)) {
-                                found = 1;
-                                break;
-                        } else
-                                put_device(dev);
-                } else
+                if (match(dev, data)) {
+                        found = 1;
                         break;
+                } else
+                        put_device(dev);
         }
-        up(&class->sem);
+        mutex_unlock(&class->p->class_mutex);
 
         return found ? dev : NULL;
 }
@@ -349,13 +376,13 @@ int class_interface_register(struct class_interface *class_intf)
         if (!parent)
                 return -EINVAL;
 
-        down(&parent->sem);
-        list_add_tail(&class_intf->node, &parent->interfaces);
+        mutex_lock(&parent->p->class_mutex);
+        list_add_tail(&class_intf->node, &parent->p->class_interfaces);
         if (class_intf->add_dev) {
-                list_for_each_entry(dev, &parent->devices, node)
+                list_for_each_entry(dev, &parent->p->class_devices, node)
                         class_intf->add_dev(dev, class_intf);
         }
-        up(&parent->sem);
+        mutex_unlock(&parent->p->class_mutex);
 
         return 0;
 }
@@ -368,13 +395,13 @@ void class_interface_unregister(struct class_interface *class_intf)
         if (!parent)
                 return;
 
-        down(&parent->sem);
+        mutex_lock(&parent->p->class_mutex);
         list_del_init(&class_intf->node);
         if (class_intf->remove_dev) {
-                list_for_each_entry(dev, &parent->devices, node)
+                list_for_each_entry(dev, &parent->p->class_devices, node)
                         class_intf->remove_dev(dev, class_intf);
         }
-        up(&parent->sem);
+        mutex_unlock(&parent->p->class_mutex);
 
         class_put(parent);
 }
@@ -389,9 +416,7 @@ int __init classes_init(void)
 
 EXPORT_SYMBOL_GPL(class_create_file);
 EXPORT_SYMBOL_GPL(class_remove_file);
-EXPORT_SYMBOL_GPL(class_register);
 EXPORT_SYMBOL_GPL(class_unregister);
-EXPORT_SYMBOL_GPL(class_create);
 EXPORT_SYMBOL_GPL(class_destroy);
 
 EXPORT_SYMBOL_GPL(class_interface_register);
diff --git a/drivers/base/core.c b/drivers/base/core.c
index ee0a51a3a41d..7d5c63c81a59 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -21,12 +21,16 @@
 #include <linux/genhd.h>
 #include <linux/kallsyms.h>
 #include <linux/semaphore.h>
+#include <linux/mutex.h>
 
 #include "base.h"
 #include "power/power.h"
 
 int (*platform_notify)(struct device *dev) = NULL;
 int (*platform_notify_remove)(struct device *dev) = NULL;
+static struct kobject *dev_kobj;
+struct kobject *sysfs_dev_char_kobj;
+struct kobject *sysfs_dev_block_kobj;
 
 #ifdef CONFIG_BLOCK
 static inline int device_is_not_partition(struct device *dev)
@@ -548,7 +552,7 @@ static struct kobject *get_device_parent(struct device *dev,
 {
         /* class devices without a parent live in /sys/class/<classname>/ */
         if (dev->class && (!parent || parent->class != dev->class))
-                return &dev->class->subsys.kobj;
+                return &dev->class->p->class_subsys.kobj;
         /* all other devices keep their parent */
         else if (parent)
                 return &parent->kobj;
@@ -594,13 +598,13 @@ static struct kobject *get_device_parent(struct device *dev,
                         parent_kobj = &parent->kobj;
 
                 /* find our class-directory at the parent and reference it */
-                spin_lock(&dev->class->class_dirs.list_lock);
-                list_for_each_entry(k, &dev->class->class_dirs.list, entry)
+                spin_lock(&dev->class->p->class_dirs.list_lock);
+                list_for_each_entry(k, &dev->class->p->class_dirs.list, entry)
                         if (k->parent == parent_kobj) {
                                 kobj = kobject_get(k);
                                 break;
                         }
-                spin_unlock(&dev->class->class_dirs.list_lock);
+                spin_unlock(&dev->class->p->class_dirs.list_lock);
                 if (kobj)
                         return kobj;
 
@@ -608,7 +612,7 @@ static struct kobject *get_device_parent(struct device *dev,
                 k = kobject_create();
                 if (!k)
                         return NULL;
-                k->kset = &dev->class->class_dirs;
+                k->kset = &dev->class->p->class_dirs;
                 retval = kobject_add(k, parent_kobj, "%s", dev->class->name);
                 if (retval < 0) {
                         kobject_put(k);
@@ -627,7 +631,7 @@ 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->class_dirs)
+            glue_dir->kset != &dev->class->p->class_dirs)
                 return;
 
         kobject_put(glue_dir);
@@ -654,17 +658,18 @@ static int device_add_class_symlinks(struct device *dev)
         if (!dev->class)
                 return 0;
 
-        error = sysfs_create_link(&dev->kobj, &dev->class->subsys.kobj,
+        error = sysfs_create_link(&dev->kobj,
+                                  &dev->class->p->class_subsys.kobj,
                                   "subsystem");
         if (error)
                 goto out;
 
 #ifdef CONFIG_SYSFS_DEPRECATED
         /* stacked class devices need a symlink in the class directory */
-        if (dev->kobj.parent != &dev->class->subsys.kobj &&
+        if (dev->kobj.parent != &dev->class->p->class_subsys.kobj &&
             device_is_not_partition(dev)) {
-                error = sysfs_create_link(&dev->class->subsys.kobj, &dev->kobj,
-                                          dev->bus_id);
+                error = sysfs_create_link(&dev->class->p->class_subsys.kobj,
+                                          &dev->kobj, dev->bus_id);
                 if (error)
                         goto out_subsys;
         }
@@ -701,13 +706,14 @@ out_device:
         if (dev->parent && device_is_not_partition(dev))
                 sysfs_remove_link(&dev->kobj, "device");
 out_busid:
-        if (dev->kobj.parent != &dev->class->subsys.kobj &&
+        if (dev->kobj.parent != &dev->class->p->class_subsys.kobj &&
             device_is_not_partition(dev))
-                sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
+                sysfs_remove_link(&dev->class->p->class_subsys.kobj,
+                                  dev->bus_id);
 #else
         /* link in the class directory pointing to the device */
-        error = sysfs_create_link(&dev->class->subsys.kobj, &dev->kobj,
-                                  dev->bus_id);
+        error = sysfs_create_link(&dev->class->p->class_subsys.kobj,
+                                  &dev->kobj, dev->bus_id);
         if (error)
                 goto out_subsys;
 
@@ -720,7 +726,7 @@ out_busid:
         return 0;
 
 out_busid:
-        sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
+        sysfs_remove_link(&dev->class->p->class_subsys.kobj, dev->bus_id);
 #endif
 
 out_subsys:
@@ -746,14 +752,15 @@ static void device_remove_class_symlinks(struct device *dev)
                 sysfs_remove_link(&dev->kobj, "device");
         }
 
-        if (dev->kobj.parent != &dev->class->subsys.kobj &&
+        if (dev->kobj.parent != &dev->class->p->class_subsys.kobj &&
             device_is_not_partition(dev))
-                sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
+                sysfs_remove_link(&dev->class->p->class_subsys.kobj,
+                                  dev->bus_id);
 #else
         if (dev->parent && device_is_not_partition(dev))
                 sysfs_remove_link(&dev->kobj, "device");
 
-        sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
+        sysfs_remove_link(&dev->class->p->class_subsys.kobj, dev->bus_id);
 #endif
 
         sysfs_remove_link(&dev->kobj, "subsystem");
@@ -776,6 +783,54 @@ int dev_set_name(struct device *dev, const char *fmt, ...)
 EXPORT_SYMBOL_GPL(dev_set_name);
 
 /**
+ * device_to_dev_kobj - select a /sys/dev/ directory for the device
+ * @dev: device
+ *
+ * By default we select char/ for new entries.  Setting class->dev_obj
+ * to NULL prevents an entry from being created.  class->dev_kobj must
+ * be set (or cleared) before any devices are registered to the class
+ * otherwise device_create_sys_dev_entry() and
+ * device_remove_sys_dev_entry() will disagree about the the presence
+ * of the link.
+ */
+static struct kobject *device_to_dev_kobj(struct device *dev)
+{
+        struct kobject *kobj;
+
+        if (dev->class)
+                kobj = dev->class->dev_kobj;
+        else
+                kobj = sysfs_dev_char_kobj;
+
+        return kobj;
+}
+
+static int device_create_sys_dev_entry(struct device *dev)
+{
+        struct kobject *kobj = device_to_dev_kobj(dev);
+        int error = 0;
+        char devt_str[15];
+
+        if (kobj) {
+                format_dev_t(devt_str, dev->devt);
+                error = sysfs_create_link(kobj, &dev->kobj, devt_str);
+        }
+
+        return error;
+}
+
+static void device_remove_sys_dev_entry(struct device *dev)
+{
+        struct kobject *kobj = device_to_dev_kobj(dev);
+        char devt_str[15];
+
+        if (kobj) {
+                format_dev_t(devt_str, dev->devt);
+                sysfs_remove_link(kobj, devt_str);
+        }
+}
+
+/**
  * device_add - add device to device hierarchy.
  * @dev: device.
  *
@@ -829,6 +884,10 @@ int device_add(struct device *dev)
                 error = device_create_file(dev, &devt_attr);
                 if (error)
                         goto ueventattrError;
+
+                error = device_create_sys_dev_entry(dev);
+                if (error)
+                        goto devtattrError;
         }
 
         error = device_add_class_symlinks(dev);
@@ -849,15 +908,16 @@ int device_add(struct device *dev)
                 klist_add_tail(&dev->knode_parent, &parent->klist_children);
 
         if (dev->class) {
-                down(&dev->class->sem);
+                mutex_lock(&dev->class->p->class_mutex);
                 /* tie the class to the device */
-                list_add_tail(&dev->node, &dev->class->devices);
+                list_add_tail(&dev->node, &dev->class->p->class_devices);
 
                 /* notify any interfaces that the device is here */
-                list_for_each_entry(class_intf, &dev->class->interfaces, node)
+                list_for_each_entry(class_intf,
+                                    &dev->class->p->class_interfaces, node)
                         if (class_intf->add_dev)
                                 class_intf->add_dev(dev, class_intf);
-                up(&dev->class->sem);
+                mutex_unlock(&dev->class->p->class_mutex);
         }
  Done:
         put_device(dev);
@@ -873,6 +933,9 @@ int device_add(struct device *dev)
         device_remove_class_symlinks(dev);
  SymlinkError:
         if (MAJOR(dev->devt))
+                device_remove_sys_dev_entry(dev);
+ devtattrError:
+        if (MAJOR(dev->devt))
                 device_remove_file(dev, &devt_attr);
  ueventattrError:
         device_remove_file(dev, &uevent_attr);
@@ -948,19 +1011,22 @@ void device_del(struct device *dev)
         device_pm_remove(dev);
         if (parent)
                 klist_del(&dev->knode_parent);
-        if (MAJOR(dev->devt))
+        if (MAJOR(dev->devt)) {
+                device_remove_sys_dev_entry(dev);
                 device_remove_file(dev, &devt_attr);
+        }
         if (dev->class) {
                 device_remove_class_symlinks(dev);
 
-                down(&dev->class->sem);
+                mutex_lock(&dev->class->p->class_mutex);
                 /* notify any interfaces that the device is now gone */
-                list_for_each_entry(class_intf, &dev->class->interfaces, node)
+                list_for_each_entry(class_intf,
+                                    &dev->class->p->class_interfaces, node)
                         if (class_intf->remove_dev)
                                 class_intf->remove_dev(dev, class_intf);
                 /* remove the device from the class list */
                 list_del_init(&dev->node);
-                up(&dev->class->sem);
+                mutex_unlock(&dev->class->p->class_mutex);
         }
         device_remove_file(dev, &uevent_attr);
         device_remove_attrs(dev);
@@ -1074,7 +1140,25 @@ int __init devices_init(void)
         devices_kset = kset_create_and_add("devices", &device_uevent_ops, NULL);
         if (!devices_kset)
                 return -ENOMEM;
+        dev_kobj = kobject_create_and_add("dev", NULL);
+        if (!dev_kobj)
+                goto dev_kobj_err;
+        sysfs_dev_block_kobj = kobject_create_and_add("block", dev_kobj);
+        if (!sysfs_dev_block_kobj)
+                goto block_kobj_err;
+        sysfs_dev_char_kobj = kobject_create_and_add("char", dev_kobj);
+        if (!sysfs_dev_char_kobj)
+                goto char_kobj_err;
+
         return 0;
+
+ char_kobj_err:
+        kobject_put(sysfs_dev_block_kobj);
+ block_kobj_err:
+        kobject_put(dev_kobj);
+ dev_kobj_err:
+        kset_unregister(devices_kset);
+        return -ENOMEM;
 }
 
 EXPORT_SYMBOL_GPL(device_for_each_child);
@@ -1158,48 +1242,11 @@ error:
 EXPORT_SYMBOL_GPL(device_create_vargs);
 
 /**
- * device_create_drvdata - creates a device and registers it with sysfs
- * @class: pointer to the struct class that this device should be registered to
- * @parent: pointer to the parent struct device of this new device, if any
- * @devt: the dev_t for the char device to be added
- * @drvdata: the data to be added to the device for callbacks
- * @fmt: string for the device's name
- *
- * This function can be used by char device classes.  A struct device
- * will be created in sysfs, registered to the specified class.
- *
- * A "dev" file will be created, showing the dev_t for the device, if
- * the dev_t is not 0,0.
- * If a pointer to a parent struct device is passed in, the newly created
- * struct device will be a child of that device in sysfs.
- * The pointer to the struct device will be returned from the call.
- * Any further sysfs files that might be required can be created using this
- * pointer.
- *
- * Note: the struct class passed to this function must have previously
- * been created with a call to class_create().
- */
-struct device *device_create_drvdata(struct class *class,
-                                     struct device *parent,
-                                     dev_t devt,
-                                     void *drvdata,
-                                     const char *fmt, ...)
-{
-        va_list vargs;
-        struct device *dev;
-
-        va_start(vargs, fmt);
-        dev = device_create_vargs(class, parent, devt, drvdata, fmt, vargs);
-        va_end(vargs);
-        return dev;
-}
-EXPORT_SYMBOL_GPL(device_create_drvdata);
-
-/**
  * device_create - creates a device and registers it with sysfs
  * @class: pointer to the struct class that this device should be registered to
  * @parent: pointer to the parent struct device of this new device, if any
  * @devt: the dev_t for the char device to be added
+ * @drvdata: the data to be added to the device for callbacks
  * @fmt: string for the device's name
  *
  * This function can be used by char device classes.  A struct device
@@ -1217,13 +1264,13 @@ EXPORT_SYMBOL_GPL(device_create_drvdata);
  * been created with a call to class_create().
  */
 struct device *device_create(struct class *class, struct device *parent,
-                             dev_t devt, const char *fmt, ...)
+                             dev_t devt, void *drvdata, const char *fmt, ...)
 {
         va_list vargs;
         struct device *dev;
 
         va_start(vargs, fmt);
-        dev = device_create_vargs(class, parent, devt, NULL, fmt, vargs);
+        dev = device_create_vargs(class, parent, devt, drvdata, fmt, vargs);
         va_end(vargs);
         return dev;
 }
@@ -1248,7 +1295,7 @@ void device_destroy(struct class *class, dev_t devt)
 {
         struct device *dev;
 
-        dev = class_find_device(class, &devt, __match_devt);
+        dev = class_find_device(class, NULL, &devt, __match_devt);
         if (dev) {
                 put_device(dev);
                 device_unregister(dev);
@@ -1298,8 +1345,9 @@ int device_rename(struct device *dev, char *new_name)
         if (old_class_name) {
                 new_class_name = make_class_name(dev->class->name, &dev->kobj);
                 if (new_class_name) {
-                        error = sysfs_create_link(&dev->parent->kobj,
-                                                  &dev->kobj, new_class_name);
+                        error = sysfs_create_link_nowarn(&dev->parent->kobj,
+                                                         &dev->kobj,
+                                                         new_class_name);
                         if (error)
                                 goto out;
                         sysfs_remove_link(&dev->parent->kobj, old_class_name);
@@ -1307,11 +1355,12 @@ int device_rename(struct device *dev, char *new_name)
         }
 #else
         if (dev->class) {
-                error = sysfs_create_link(&dev->class->subsys.kobj, &dev->kobj,
-                                          dev->bus_id);
+                error = sysfs_create_link_nowarn(&dev->class->p->class_subsys.kobj,
+                                                 &dev->kobj, dev->bus_id);
                 if (error)
                         goto out;
-                sysfs_remove_link(&dev->class->subsys.kobj, old_device_name);
+                sysfs_remove_link(&dev->class->p->class_subsys.kobj,
+                                  old_device_name);
         }
 #endif
 
@@ -1447,4 +1496,7 @@ void device_shutdown(void)
                         dev->driver->shutdown(dev);
                 }
         }
+        kobject_put(sysfs_dev_char_kobj);
+        kobject_put(sysfs_dev_block_kobj);
+        kobject_put(dev_kobj);
 }
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index e38dfed41d80..64f5d54f7edc 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -21,15 +21,16 @@ EXPORT_SYMBOL(cpu_sysdev_class);
 static DEFINE_PER_CPU(struct sys_device *, cpu_sys_devices);
 
 #ifdef CONFIG_HOTPLUG_CPU
-static ssize_t show_online(struct sys_device *dev, char *buf)
+static ssize_t show_online(struct sys_device *dev, struct sysdev_attribute *attr,
+                           char *buf)
 {
         struct cpu *cpu = container_of(dev, struct cpu, sysdev);
 
         return sprintf(buf, "%u\n", !!cpu_online(cpu->sysdev.id));
 }
 
-static ssize_t __ref store_online(struct sys_device *dev, const char *buf,
-                            size_t count)
+static ssize_t __ref store_online(struct sys_device *dev, struct sysdev_attribute *attr,
+                                 const char *buf, size_t count)
 {
         struct cpu *cpu = container_of(dev, struct cpu, sysdev);
         ssize_t ret;
@@ -80,7 +81,8 @@ static inline void register_cpu_control(struct cpu *cpu)
 #ifdef CONFIG_KEXEC
 #include <linux/kexec.h>
 
-static ssize_t show_crash_notes(struct sys_device *dev, char *buf)
+static ssize_t show_crash_notes(struct sys_device *dev, struct sysdev_attribute *attr,
+                                char *buf)
 {
         struct cpu *cpu = container_of(dev, struct cpu, sysdev);
         ssize_t rc;
@@ -119,14 +121,14 @@ static ssize_t print_cpus_##type(struct sysdev_class *class, char *buf)	\
 {                                                                       \
         return print_cpus_map(buf, &cpu_##type##_map);                  \
 }                                                                       \
-struct sysdev_class_attribute attr_##type##_map =                       \
+static struct sysdev_class_attribute attr_##type##_map =                \
         _SYSDEV_CLASS_ATTR(type, 0444, print_cpus_##type, NULL)
 
 print_cpus_func(online);
 print_cpus_func(possible);
 print_cpus_func(present);
 
-struct sysdev_class_attribute *cpu_state_attr[] = {
+static struct sysdev_class_attribute *cpu_state_attr[] = {
         &attr_online_map,
         &attr_possible_map,
         &attr_present_map,
diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index 9fd4a8534146..b0be1d18fee2 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -49,6 +49,14 @@ struct firmware_priv {
         struct timer_list timeout;
 };
 
+#ifdef CONFIG_FW_LOADER
+extern struct builtin_fw __start_builtin_fw[];
+extern struct builtin_fw __end_builtin_fw[];
+#else /* Module case. Avoid ifdefs later; it'll all optimise out */
+static struct builtin_fw *__start_builtin_fw;
+static struct builtin_fw *__end_builtin_fw;
+#endif
+
 static void
 fw_load_abort(struct firmware_priv *fw_priv)
 {
@@ -257,7 +265,7 @@ firmware_data_write(struct kobject *kobj, struct bin_attribute *bin_attr,
         if (retval)
                 goto out;
 
-        memcpy(fw->data + offset, buffer, count);
+        memcpy((u8 *)fw->data + offset, buffer, count);
 
         fw->size = max_t(size_t, offset + count, fw->size);
         retval = count;
@@ -391,13 +399,12 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
         struct device *f_dev;
         struct firmware_priv *fw_priv;
         struct firmware *firmware;
+        struct builtin_fw *builtin;
         int retval;
 
         if (!firmware_p)
                 return -EINVAL;
 
-        printk(KERN_INFO "firmware: requesting %s\n", name);
-
         *firmware_p = firmware = kzalloc(sizeof(*firmware), GFP_KERNEL);
         if (!firmware) {
                 printk(KERN_ERR "%s: kmalloc(struct firmware) failed\n",
@@ -406,6 +413,20 @@ _request_firmware(const struct firmware **firmware_p, const char *name,
                 goto out;
         }
 
+        for (builtin = __start_builtin_fw; builtin != __end_builtin_fw;
+             builtin++) {
+                if (strcmp(name, builtin->name))
+                        continue;
+                printk(KERN_INFO "firmware: using built-in firmware %s\n",
+                       name);
+                firmware->size = builtin->size;
+                firmware->data = builtin->data;
+                return 0;
+        }
+
+        if (uevent)
+                printk(KERN_INFO "firmware: requesting %s\n", name);
+
         retval = fw_setup_device(firmware, &f_dev, name, device, uevent);
         if (retval)
                 goto error_kfree_fw;
@@ -473,8 +494,16 @@ request_firmware(const struct firmware **firmware_p, const char *name,
 void
 release_firmware(const struct firmware *fw)
 {
+        struct builtin_fw *builtin;
+
         if (fw) {
+                for (builtin = __start_builtin_fw; builtin != __end_builtin_fw;
+                     builtin++) {
+                        if (fw->data == builtin->data)
+                                goto free_fw;
+                }
                 vfree(fw->data);
+        free_fw:
                 kfree(fw);
         }
 }
diff --git a/drivers/base/memory.c b/drivers/base/memory.c
index 937e8258981d..4d4e0e7b6e92 100644
--- a/drivers/base/memory.c
+++ b/drivers/base/memory.c
@@ -92,7 +92,8 @@ unregister_memory(struct memory_block *memory, struct mem_section *section)
  * uses.
  */
 
-static ssize_t show_mem_phys_index(struct sys_device *dev, char *buf)
+static ssize_t show_mem_phys_index(struct sys_device *dev,
+                        struct sysdev_attribute *attr, char *buf)
 {
         struct memory_block *mem =
                 container_of(dev, struct memory_block, sysdev);
@@ -102,7 +103,8 @@ static ssize_t show_mem_phys_index(struct sys_device *dev, char *buf)
 /*
  * online, offline, going offline, etc.
  */
-static ssize_t show_mem_state(struct sys_device *dev, char *buf)
+static ssize_t show_mem_state(struct sys_device *dev,
+                        struct sysdev_attribute *attr, char *buf)
 {
         struct memory_block *mem =
                 container_of(dev, struct memory_block, sysdev);
@@ -217,7 +219,8 @@ out:
 }
 
 static ssize_t
-store_mem_state(struct sys_device *dev, const char *buf, size_t count)
+store_mem_state(struct sys_device *dev,
+                struct sysdev_attribute *attr, const char *buf, size_t count)
 {
         struct memory_block *mem;
         unsigned int phys_section_nr;
@@ -248,7 +251,8 @@ out:
  * s.t. if I offline all of these sections I can then
  * remove the physical device?
  */
-static ssize_t show_phys_device(struct sys_device *dev, char *buf)
+static ssize_t show_phys_device(struct sys_device *dev,
+                                struct sysdev_attribute *attr, char *buf)
 {
         struct memory_block *mem =
                 container_of(dev, struct memory_block, sysdev);
diff --git a/drivers/base/node.c b/drivers/base/node.c
index 0f867a083338..5116b78c6325 100644
--- a/drivers/base/node.c
+++ b/drivers/base/node.c
@@ -36,11 +36,13 @@ static ssize_t node_read_cpumap(struct sys_device *dev, int type, char *buf)
         return len;
 }
 
-static inline ssize_t node_read_cpumask(struct sys_device *dev, char *buf)
+static inline ssize_t node_read_cpumask(struct sys_device *dev,
+                                struct sysdev_attribute *attr, char *buf)
 {
         return node_read_cpumap(dev, 0, buf);
 }
-static inline ssize_t node_read_cpulist(struct sys_device *dev, char *buf)
+static inline ssize_t node_read_cpulist(struct sys_device *dev,
+                                struct sysdev_attribute *attr, char *buf)
 {
         return node_read_cpumap(dev, 1, buf);
 }
@@ -49,7 +51,8 @@ static SYSDEV_ATTR(cpumap,  S_IRUGO, node_read_cpumask, NULL);
 static SYSDEV_ATTR(cpulist, S_IRUGO, node_read_cpulist, NULL);
 
 #define K(x) ((x) << (PAGE_SHIFT - 10))
-static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
+static ssize_t node_read_meminfo(struct sys_device * dev,
+                        struct sysdev_attribute *attr, char * buf)
 {
         int n;
         int nid = dev->id;
@@ -112,7 +115,8 @@ static ssize_t node_read_meminfo(struct sys_device * dev, char * buf)
 #undef K
 static SYSDEV_ATTR(meminfo, S_IRUGO, node_read_meminfo, NULL);
 
-static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
+static ssize_t node_read_numastat(struct sys_device * dev,
+                                struct sysdev_attribute *attr, char * buf)
 {
         return sprintf(buf,
                        "numa_hit %lu\n"
@@ -130,7 +134,8 @@ static ssize_t node_read_numastat(struct sys_device * dev, char * buf)
 }
 static SYSDEV_ATTR(numastat, S_IRUGO, node_read_numastat, NULL);
 
-static ssize_t node_read_distance(struct sys_device * dev, char * buf)
+static ssize_t node_read_distance(struct sys_device * dev,
+                        struct sysdev_attribute *attr, char * buf)
 {
         int nid = dev->id;
         int len = 0;
diff --git a/drivers/base/platform.c b/drivers/base/platform.c
index 911ec600fe71..3f940393d6c7 100644
--- a/drivers/base/platform.c
+++ b/drivers/base/platform.c
@@ -453,6 +453,8 @@ int platform_driver_register(struct platform_driver *drv)
                 drv->driver.suspend = platform_drv_suspend;
         if (drv->resume)
                 drv->driver.resume = platform_drv_resume;
+        if (drv->pm)
+                drv->driver.pm = &drv->pm->base;
         return driver_register(&drv->driver);
 }
 EXPORT_SYMBOL_GPL(platform_driver_register);
@@ -560,7 +562,9 @@ static int platform_match(struct device *dev, struct device_driver *drv)
         return (strncmp(pdev->name, drv->name, BUS_ID_SIZE) == 0);
 }
 
-static int platform_suspend(struct device *dev, pm_message_t mesg)
+#ifdef CONFIG_PM_SLEEP
+
+static int platform_legacy_suspend(struct device *dev, pm_message_t mesg)
 {
         int ret = 0;
 
@@ -570,7 +574,7 @@ static int platform_suspend(struct device *dev, pm_message_t mesg)
         return ret;
 }
 
-static int platform_suspend_late(struct device *dev, pm_message_t mesg)
+static int platform_legacy_suspend_late(struct device *dev, pm_message_t mesg)
 {
         struct platform_driver *drv = to_platform_driver(dev->driver);
         struct platform_device *pdev;
@@ -583,7 +587,7 @@ static int platform_suspend_late(struct device *dev, pm_message_t mesg)
         return ret;
 }
 
-static int platform_resume_early(struct device *dev)
+static int platform_legacy_resume_early(struct device *dev)
 {
         struct platform_driver *drv = to_platform_driver(dev->driver);
         struct platform_device *pdev;
@@ -596,7 +600,7 @@ static int platform_resume_early(struct device *dev)
         return ret;
 }
 
-static int platform_resume(struct device *dev)
+static int platform_legacy_resume(struct device *dev)
 {
         int ret = 0;
 
@@ -606,15 +610,291 @@ static int platform_resume(struct device *dev)
         return ret;
 }
 
+static int platform_pm_prepare(struct device *dev)
+{
+        struct device_driver *drv = dev->driver;
+        int ret = 0;
+
+        if (drv && drv->pm && drv->pm->prepare)
+                ret = drv->pm->prepare(dev);
+
+        return ret;
+}
+
+static void platform_pm_complete(struct device *dev)
+{
+        struct device_driver *drv = dev->driver;
+
+        if (drv && drv->pm && drv->pm->complete)
+                drv->pm->complete(dev);
+}
+
+#ifdef CONFIG_SUSPEND
+
+static int platform_pm_suspend(struct device *dev)
+{
+        struct device_driver *drv = dev->driver;
+        int ret = 0;
+
+        if (drv && drv->pm) {
+                if (drv->pm->suspend)
+                        ret = drv->pm->suspend(dev);
+        } else {
+                ret = platform_legacy_suspend(dev, PMSG_SUSPEND);
+        }
+
+        return ret;
+}
+
+static int platform_pm_suspend_noirq(struct device *dev)
+{
+        struct platform_driver *pdrv;
+        int ret = 0;
+
+        if (!dev->driver)
+                return 0;
+
+        pdrv = to_platform_driver(dev->driver);
+        if (pdrv->pm) {
+                if (pdrv->pm->suspend_noirq)
+                        ret = pdrv->pm->suspend_noirq(dev);
+        } else {
+                ret = platform_legacy_suspend_late(dev, PMSG_SUSPEND);
+        }
+
+        return ret;
+}
+
+static int platform_pm_resume(struct device *dev)
+{
+        struct device_driver *drv = dev->driver;
+        int ret = 0;
+
+        if (drv && drv->pm) {
+                if (drv->pm->resume)
+                        ret = drv->pm->resume(dev);
+        } else {
+                ret = platform_legacy_resume(dev);
+        }
+
+        return ret;
+}
+
+static int platform_pm_resume_noirq(struct device *dev)
+{
+        struct platform_driver *pdrv;
+        int ret = 0;
+
+        if (!dev->driver)
+                return 0;
+
+        pdrv = to_platform_driver(dev->driver);
+        if (pdrv->pm) {
+                if (pdrv->pm->resume_noirq)
+                        ret = pdrv->pm->resume_noirq(dev);
+        } else {
+                ret = platform_legacy_resume_early(dev);
+        }
+
+        return ret;
+}
+
+#else /* !CONFIG_SUSPEND */
+
+#define platform_pm_suspend             NULL
+#define platform_pm_resume              NULL
+#define platform_pm_suspend_noirq       NULL
+#define platform_pm_resume_noirq        NULL
+
+#endif /* !CONFIG_SUSPEND */
+
+#ifdef CONFIG_HIBERNATION
+
+static int platform_pm_freeze(struct device *dev)
+{
+        struct device_driver *drv = dev->driver;
+        int ret = 0;
+
+        if (!drv)
+                return 0;
+
+        if (drv->pm) {
+                if (drv->pm->freeze)
+                        ret = drv->pm->freeze(dev);
+        } else {
+                ret = platform_legacy_suspend(dev, PMSG_FREEZE);
+        }
+
+        return ret;
+}
+
+static int platform_pm_freeze_noirq(struct device *dev)
+{
+        struct platform_driver *pdrv;
+        int ret = 0;
+
+        if (!dev->driver)
+                return 0;
+
+        pdrv = to_platform_driver(dev->driver);
+        if (pdrv->pm) {
+                if (pdrv->pm->freeze_noirq)
+                        ret = pdrv->pm->freeze_noirq(dev);
+        } else {
+                ret = platform_legacy_suspend_late(dev, PMSG_FREEZE);
+        }
+
+        return ret;
+}
+
+static int platform_pm_thaw(struct device *dev)
+{
+        struct device_driver *drv = dev->driver;
+        int ret = 0;
+
+        if (drv && drv->pm) {
+                if (drv->pm->thaw)
+                        ret = drv->pm->thaw(dev);
+        } else {
+                ret = platform_legacy_resume(dev);
+        }
+
+        return ret;
+}
+
+static int platform_pm_thaw_noirq(struct device *dev)
+{
+        struct platform_driver *pdrv;
+        int ret = 0;
+
+        if (!dev->driver)
+                return 0;
+
+        pdrv = to_platform_driver(dev->driver);
+        if (pdrv->pm) {
+                if (pdrv->pm->thaw_noirq)
+                        ret = pdrv->pm->thaw_noirq(dev);
+        } else {
+                ret = platform_legacy_resume_early(dev);
+        }
+
+        return ret;
+}
+
+static int platform_pm_poweroff(struct device *dev)
+{
+        struct device_driver *drv = dev->driver;
+        int ret = 0;
+
+        if (drv && drv->pm) {
+                if (drv->pm->poweroff)
+                        ret = drv->pm->poweroff(dev);
+        } else {
+                ret = platform_legacy_suspend(dev, PMSG_HIBERNATE);
+        }
+
+        return ret;
+}
+
+static int platform_pm_poweroff_noirq(struct device *dev)
+{
+        struct platform_driver *pdrv;
+        int ret = 0;
+
+        if (!dev->driver)
+                return 0;
+
+        pdrv = to_platform_driver(dev->driver);
+        if (pdrv->pm) {
+                if (pdrv->pm->poweroff_noirq)
+                        ret = pdrv->pm->poweroff_noirq(dev);
+        } else {
+                ret = platform_legacy_suspend_late(dev, PMSG_HIBERNATE);
+        }
+
+        return ret;
+}
+
+static int platform_pm_restore(struct device *dev)
+{
+        struct device_driver *drv = dev->driver;
+        int ret = 0;
+
+        if (drv && drv->pm) {
+                if (drv->pm->restore)
+                        ret = drv->pm->restore(dev);
+        } else {
+                ret = platform_legacy_resume(dev);
+        }
+
+        return ret;
+}
+
+static int platform_pm_restore_noirq(struct device *dev)
+{
+        struct platform_driver *pdrv;
+        int ret = 0;
+
+        if (!dev->driver)
+                return 0;
+
+        pdrv = to_platform_driver(dev->driver);
+        if (pdrv->pm) {
+                if (pdrv->pm->restore_noirq)
+                        ret = pdrv->pm->restore_noirq(dev);
+        } else {
+                ret = platform_legacy_resume_early(dev);
+        }
+
+        return ret;
+}
+
+#else /* !CONFIG_HIBERNATION */
+
+#define platform_pm_freeze              NULL
+#define platform_pm_thaw                NULL
+#define platform_pm_poweroff            NULL
+#define platform_pm_restore             NULL
+#define platform_pm_freeze_noirq        NULL
+#define platform_pm_thaw_noirq          NULL
+#define platform_pm_poweroff_noirq      NULL
+#define platform_pm_restore_noirq       NULL
+
+#endif /* !CONFIG_HIBERNATION */
+
+struct pm_ext_ops platform_pm_ops = {
+        .base = {
+                .prepare = platform_pm_prepare,
+                .complete = platform_pm_complete,
+                .suspend = platform_pm_suspend,
+                .resume = platform_pm_resume,
+                .freeze = platform_pm_freeze,
+                .thaw = platform_pm_thaw,
+                .poweroff = platform_pm_poweroff,
+                .restore = platform_pm_restore,
+        },
+        .suspend_noirq = platform_pm_suspend_noirq,
+        .resume_noirq = platform_pm_resume_noirq,
+        .freeze_noirq = platform_pm_freeze_noirq,
+        .thaw_noirq = platform_pm_thaw_noirq,
+        .poweroff_noirq = platform_pm_poweroff_noirq,
+        .restore_noirq = platform_pm_restore_noirq,
+};
+
+#define PLATFORM_PM_OPS_PTR     &platform_pm_ops
+
+#else /* !CONFIG_PM_SLEEP */
+
+#define PLATFORM_PM_OPS_PTR     NULL
+
+#endif /* !CONFIG_PM_SLEEP */
+
 struct bus_type platform_bus_type = {
         .name           = "platform",
         .dev_attrs      = platform_dev_attrs,
         .match          = platform_match,
         .uevent         = platform_uevent,
-        .suspend        = platform_suspend,
-        .suspend_late   = platform_suspend_late,
-        .resume_early   = platform_resume_early,
-        .resume         = platform_resume,
+        .pm             = PLATFORM_PM_OPS_PTR,
 };
 EXPORT_SYMBOL_GPL(platform_bus_type);
 
diff --git a/drivers/base/power/main.c b/drivers/base/power/main.c
index 45cc3d9eacb8..3250c5257b74 100644
--- a/drivers/base/power/main.c
+++ b/drivers/base/power/main.c
@@ -12,11 +12,9 @@
  * and add it to the list of power-controlled devices. sysfs entries for
  * controlling device power management will also be added.
  *
- * A different set of lists than the global subsystem list are used to
- * keep track of power info because we use different lists to hold
- * devices based on what stage of the power management process they
- * are in. The power domain dependencies may also differ from the
- * ancestral dependencies that the subsystem list maintains.
+ * A separate list is used for keeping track of power info, because the power
+ * domain dependencies may differ from the ancestral dependencies that the
+ * subsystem list maintains.
  */
 
 #include <linux/device.h>
@@ -30,31 +28,40 @@
 #include "power.h"
 
 /*
- * The entries in the dpm_active list are in a depth first order, simply
+ * The entries in the dpm_list list are in a depth first order, simply
  * because children are guaranteed to be discovered after parents, and
  * are inserted at the back of the list on discovery.
  *
- * All the other lists are kept in the same order, for consistency.
- * However the lists aren't always traversed in the same order.
- * Semaphores must be acquired from the top (i.e., front) down
- * and released in the opposite order.  Devices must be suspended
- * from the bottom (i.e., end) up and resumed in the opposite order.
- * That way no parent will be suspended while it still has an active
- * child.
- *
  * Since device_pm_add() may be called with a device semaphore held,
  * we must never try to acquire a device semaphore while holding
  * dpm_list_mutex.
  */
 
-LIST_HEAD(dpm_active);
-static LIST_HEAD(dpm_off);
-static LIST_HEAD(dpm_off_irq);
+LIST_HEAD(dpm_list);
 
 static DEFINE_MUTEX(dpm_list_mtx);
 
-/* 'true' if all devices have been suspended, protected by dpm_list_mtx */
-static bool all_sleeping;
+/*
+ * Set once the preparation of devices for a PM transition has started, reset
+ * before starting to resume devices.  Protected by dpm_list_mtx.
+ */
+static bool transition_started;
+
+/**
+ *      device_pm_lock - lock the list of active devices used by the PM core
+ */
+void device_pm_lock(void)
+{
+        mutex_lock(&dpm_list_mtx);
+}
+
+/**
+ *      device_pm_unlock - unlock the list of active devices used by the PM core
+ */
+void device_pm_unlock(void)
+{
+        mutex_unlock(&dpm_list_mtx);
+}
 
 /**
  *      device_pm_add - add a device to the list of active devices
@@ -68,17 +75,25 @@ int device_pm_add(struct device *dev)
                  dev->bus ? dev->bus->name : "No Bus",
                  kobject_name(&dev->kobj));
         mutex_lock(&dpm_list_mtx);
-        if ((dev->parent && dev->parent->power.sleeping) || all_sleeping) {
-                if (dev->parent->power.sleeping)
-                        dev_warn(dev, "parent %s is sleeping\n",
+        if (dev->parent) {
+                if (dev->parent->power.status >= DPM_SUSPENDING) {
+                        dev_warn(dev, "parent %s is sleeping, will not add\n",
                                 dev->parent->bus_id);
-                else
-                        dev_warn(dev, "all devices are sleeping\n");
+                        WARN_ON(true);
+                }
+        } else if (transition_started) {
+                /*
+                 * We refuse to register parentless devices while a PM
+                 * transition is in progress in order to avoid leaving them
+                 * unhandled down the road
+                 */
                 WARN_ON(true);
         }
         error = dpm_sysfs_add(dev);
-        if (!error)
-                list_add_tail(&dev->power.entry, &dpm_active);
+        if (!error) {
+                dev->power.status = DPM_ON;
+                list_add_tail(&dev->power.entry, &dpm_list);
+        }
         mutex_unlock(&dpm_list_mtx);
         return error;
 }
@@ -100,73 +115,243 @@ void device_pm_remove(struct device *dev)
         mutex_unlock(&dpm_list_mtx);
 }
 
+/**
+ *      pm_op - execute the PM operation appropiate for given PM event
+ *      @dev:   Device.
+ *      @ops:   PM operations to choose from.
+ *      @state: PM transition of the system being carried out.
+ */
+static int pm_op(struct device *dev, struct pm_ops *ops, pm_message_t state)
+{
+        int error = 0;
+
+        switch (state.event) {
+#ifdef CONFIG_SUSPEND
+        case PM_EVENT_SUSPEND:
+                if (ops->suspend) {
+                        error = ops->suspend(dev);
+                        suspend_report_result(ops->suspend, error);
+                }
+                break;
+        case PM_EVENT_RESUME:
+                if (ops->resume) {
+                        error = ops->resume(dev);
+                        suspend_report_result(ops->resume, error);
+                }
+                break;
+#endif /* CONFIG_SUSPEND */
+#ifdef CONFIG_HIBERNATION
+        case PM_EVENT_FREEZE:
+        case PM_EVENT_QUIESCE:
+                if (ops->freeze) {
+                        error = ops->freeze(dev);
+                        suspend_report_result(ops->freeze, error);
+                }
+                break;
+        case PM_EVENT_HIBERNATE:
+                if (ops->poweroff) {
+                        error = ops->poweroff(dev);
+                        suspend_report_result(ops->poweroff, error);
+                }
+                break;
+        case PM_EVENT_THAW:
+        case PM_EVENT_RECOVER:
+                if (ops->thaw) {
+                        error = ops->thaw(dev);
+                        suspend_report_result(ops->thaw, error);
+                }
+                break;
+        case PM_EVENT_RESTORE:
+                if (ops->restore) {
+                        error = ops->restore(dev);
+                        suspend_report_result(ops->restore, error);
+                }
+                break;
+#endif /* CONFIG_HIBERNATION */
+        default:
+                error = -EINVAL;
+        }
+        return error;
+}
+
+/**
+ *      pm_noirq_op - execute the PM operation appropiate for given PM event
+ *      @dev:   Device.
+ *      @ops:   PM operations to choose from.
+ *      @state: PM transition of the system being carried out.
+ *
+ *      The operation is executed with interrupts disabled by the only remaining
+ *      functional CPU in the system.
+ */
+static int pm_noirq_op(struct device *dev, struct pm_ext_ops *ops,
+                        pm_message_t state)
+{
+        int error = 0;
+
+        switch (state.event) {
+#ifdef CONFIG_SUSPEND
+        case PM_EVENT_SUSPEND:
+                if (ops->suspend_noirq) {
+                        error = ops->suspend_noirq(dev);
+                        suspend_report_result(ops->suspend_noirq, error);
+                }
+                break;
+        case PM_EVENT_RESUME:
+                if (ops->resume_noirq) {
+                        error = ops->resume_noirq(dev);
+                        suspend_report_result(ops->resume_noirq, error);
+                }
+                break;
+#endif /* CONFIG_SUSPEND */
+#ifdef CONFIG_HIBERNATION
+        case PM_EVENT_FREEZE:
+        case PM_EVENT_QUIESCE:
+                if (ops->freeze_noirq) {
+                        error = ops->freeze_noirq(dev);
+                        suspend_report_result(ops->freeze_noirq, error);
+                }
+                break;
+        case PM_EVENT_HIBERNATE:
+                if (ops->poweroff_noirq) {
+                        error = ops->poweroff_noirq(dev);
+                        suspend_report_result(ops->poweroff_noirq, error);
+                }
+                break;
+        case PM_EVENT_THAW:
+        case PM_EVENT_RECOVER:
+                if (ops->thaw_noirq) {
+                        error = ops->thaw_noirq(dev);
+                        suspend_report_result(ops->thaw_noirq, error);
+                }
+                break;
+        case PM_EVENT_RESTORE:
+                if (ops->restore_noirq) {
+                        error = ops->restore_noirq(dev);
+                        suspend_report_result(ops->restore_noirq, error);
+                }
+                break;
+#endif /* CONFIG_HIBERNATION */
+        default:
+                error = -EINVAL;
+        }
+        return error;
+}
+
+static char *pm_verb(int event)
+{
+        switch (event) {
+        case PM_EVENT_SUSPEND:
+                return "suspend";
+        case PM_EVENT_RESUME:
+                return "resume";
+        case PM_EVENT_FREEZE:
+                return "freeze";
+        case PM_EVENT_QUIESCE:
+                return "quiesce";
+        case PM_EVENT_HIBERNATE:
+                return "hibernate";
+        case PM_EVENT_THAW:
+                return "thaw";
+        case PM_EVENT_RESTORE:
+                return "restore";
+        case PM_EVENT_RECOVER:
+                return "recover";
+        default:
+                return "(unknown PM event)";
+        }
+}
+
+static void pm_dev_dbg(struct device *dev, pm_message_t state, char *info)
+{
+        dev_dbg(dev, "%s%s%s\n", info, pm_verb(state.event),
+                ((state.event & PM_EVENT_SLEEP) && device_may_wakeup(dev)) ?
+                ", may wakeup" : "");
+}
+
+static void pm_dev_err(struct device *dev, pm_message_t state, char *info,
+                        int error)
+{
+        printk(KERN_ERR "PM: Device %s failed to %s%s: error %d\n",
+                kobject_name(&dev->kobj), pm_verb(state.event), info, error);
+}
+
 /*------------------------- Resume routines -------------------------*/
 
 /**
- *      resume_device_early - Power on one device (early resume).
+ *      resume_device_noirq - Power on one device (early resume).
  *      @dev:   Device.
+ *      @state: PM transition of the system being carried out.
  *
  *      Must be called with interrupts disabled.
  */
-static int resume_device_early(struct device *dev)
+static int resume_device_noirq(struct device *dev, pm_message_t state)
 {
         int error = 0;
 
         TRACE_DEVICE(dev);
         TRACE_RESUME(0);
 
-        if (dev->bus && dev->bus->resume_early) {
-                dev_dbg(dev, "EARLY resume\n");
+        if (!dev->bus)
+                goto End;
+
+        if (dev->bus->pm) {
+                pm_dev_dbg(dev, state, "EARLY ");
+                error = pm_noirq_op(dev, dev->bus->pm, state);
+        } else if (dev->bus->resume_early) {
+                pm_dev_dbg(dev, state, "legacy EARLY ");
                 error = dev->bus->resume_early(dev);
         }
-
+ End:
         TRACE_RESUME(error);
         return error;
 }
 
 /**
  *      dpm_power_up - Power on all regular (non-sysdev) devices.
+ *      @state: PM transition of the system being carried out.
  *
- *      Walk the dpm_off_irq list and power each device up. This
- *      is used for devices that required they be powered down with
- *      interrupts disabled. As devices are powered on, they are moved
- *      to the dpm_off list.
+ *      Execute the appropriate "noirq resume" callback for all devices marked
+ *      as DPM_OFF_IRQ.
  *
  *      Must be called with interrupts disabled and only one CPU running.
  */
-static void dpm_power_up(void)
+static void dpm_power_up(pm_message_t state)
 {
+        struct device *dev;
 
-        while (!list_empty(&dpm_off_irq)) {
-                struct list_head *entry = dpm_off_irq.next;
-                struct device *dev = to_device(entry);
+        list_for_each_entry(dev, &dpm_list, power.entry)
+                if (dev->power.status > DPM_OFF) {
+                        int error;
 
-                list_move_tail(entry, &dpm_off);
-                resume_device_early(dev);
-        }
+                        dev->power.status = DPM_OFF;
+                        error = resume_device_noirq(dev, state);
+                        if (error)
+                                pm_dev_err(dev, state, " early", error);
+                }
 }
 
 /**
  *      device_power_up - Turn on all devices that need special attention.
+ *      @state: PM transition of the system being carried out.
  *
  *      Power on system devices, then devices that required we shut them down
  *      with interrupts disabled.
  *
  *      Must be called with interrupts disabled.
  */
-void device_power_up(void)
+void device_power_up(pm_message_t state)
 {
         sysdev_resume();
-        dpm_power_up();
+        dpm_power_up(state);
 }
 EXPORT_SYMBOL_GPL(device_power_up);
 
 /**
  *      resume_device - Restore state for one device.
  *      @dev:   Device.
- *
+ *      @state: PM transition of the system being carried out.
  */
-static int resume_device(struct device *dev)
+static int resume_device(struct device *dev, pm_message_t state)
 {
         int error = 0;
 
@@ -175,21 +360,40 @@ static int resume_device(struct device *dev)
 
         down(&dev->sem);
 
-        if (dev->bus && dev->bus->resume) {
-                dev_dbg(dev,"resuming\n");
-                error = dev->bus->resume(dev);
+        if (dev->bus) {
+                if (dev->bus->pm) {
+                        pm_dev_dbg(dev, state, "");
+                        error = pm_op(dev, &dev->bus->pm->base, state);
+                } else if (dev->bus->resume) {
+                        pm_dev_dbg(dev, state, "legacy ");
+                        error = dev->bus->resume(dev);
+                }
+                if (error)
+                        goto End;
         }
 
-        if (!error && dev->type && dev->type->resume) {
-                dev_dbg(dev,"resuming\n");
-                error = dev->type->resume(dev);
+        if (dev->type) {
+                if (dev->type->pm) {
+                        pm_dev_dbg(dev, state, "type ");
+                        error = pm_op(dev, dev->type->pm, state);
+                } else if (dev->type->resume) {
+                        pm_dev_dbg(dev, state, "legacy type ");
+                        error = dev->type->resume(dev);
+                }
+                if (error)
+                        goto End;
         }
 
-        if (!error && dev->class && dev->class->resume) {
-                dev_dbg(dev,"class resume\n");
-                error = dev->class->resume(dev);
+        if (dev->class) {
+                if (dev->class->pm) {
+                        pm_dev_dbg(dev, state, "class ");
+                        error = pm_op(dev, dev->class->pm, state);
+                } else if (dev->class->resume) {
+                        pm_dev_dbg(dev, state, "legacy class ");
+                        error = dev->class->resume(dev);
+                }
         }
-
+ End:
         up(&dev->sem);
 
         TRACE_RESUME(error);
@@ -198,78 +402,161 @@ static int resume_device(struct device *dev)
 
 /**
  *      dpm_resume - Resume every device.
+ *      @state: PM transition of the system being carried out.
  *
- *      Resume the devices that have either not gone through
- *      the late suspend, or that did go through it but also
- *      went through the early resume.
+ *      Execute the appropriate "resume" callback for all devices the status of
+ *      which indicates that they are inactive.
+ */
+static void dpm_resume(pm_message_t state)
+{
+        struct list_head list;
+
+        INIT_LIST_HEAD(&list);
+        mutex_lock(&dpm_list_mtx);
+        transition_started = false;
+        while (!list_empty(&dpm_list)) {
+                struct device *dev = to_device(dpm_list.next);
+
+                get_device(dev);
+                if (dev->power.status >= DPM_OFF) {
+                        int error;
+
+                        dev->power.status = DPM_RESUMING;
+                        mutex_unlock(&dpm_list_mtx);
+
+                        error = resume_device(dev, state);
+
+                        mutex_lock(&dpm_list_mtx);
+                        if (error)
+                                pm_dev_err(dev, state, "", error);
+                } else if (dev->power.status == DPM_SUSPENDING) {
+                        /* Allow new children of the device to be registered */
+                        dev->power.status = DPM_RESUMING;
+                }
+                if (!list_empty(&dev->power.entry))
+                        list_move_tail(&dev->power.entry, &list);
+                put_device(dev);
+        }
+        list_splice(&list, &dpm_list);
+        mutex_unlock(&dpm_list_mtx);
+}
+
+/**
+ *      complete_device - Complete a PM transition for given device
+ *      @dev:   Device.
+ *      @state: PM transition of the system being carried out.
+ */
+static void complete_device(struct device *dev, pm_message_t state)
+{
+        down(&dev->sem);
+
+        if (dev->class && dev->class->pm && dev->class->pm->complete) {
+                pm_dev_dbg(dev, state, "completing class ");
+                dev->class->pm->complete(dev);
+        }
+
+        if (dev->type && dev->type->pm && dev->type->pm->complete) {
+                pm_dev_dbg(dev, state, "completing type ");
+                dev->type->pm->complete(dev);
+        }
+
+        if (dev->bus && dev->bus->pm && dev->bus->pm->base.complete) {
+                pm_dev_dbg(dev, state, "completing ");
+                dev->bus->pm->base.complete(dev);
+        }
+
+        up(&dev->sem);
+}
+
+/**
+ *      dpm_complete - Complete a PM transition for all devices.
+ *      @state: PM transition of the system being carried out.
  *
- *      Take devices from the dpm_off_list, resume them,
- *      and put them on the dpm_locked list.
+ *      Execute the ->complete() callbacks for all devices that are not marked
+ *      as DPM_ON.
  */
-static void dpm_resume(void)
+static void dpm_complete(pm_message_t state)
 {
+        struct list_head list;
+
+        INIT_LIST_HEAD(&list);
         mutex_lock(&dpm_list_mtx);
-        all_sleeping = false;
-        while(!list_empty(&dpm_off)) {
-                struct list_head *entry = dpm_off.next;
-                struct device *dev = to_device(entry);
+        while (!list_empty(&dpm_list)) {
+                struct device *dev = to_device(dpm_list.prev);
 
-                list_move_tail(entry, &dpm_active);
-                dev->power.sleeping = false;
-                mutex_unlock(&dpm_list_mtx);
-                resume_device(dev);
-                mutex_lock(&dpm_list_mtx);
+                get_device(dev);
+                if (dev->power.status > DPM_ON) {
+                        dev->power.status = DPM_ON;
+                        mutex_unlock(&dpm_list_mtx);
+
+                        complete_device(dev, state);
+
+                        mutex_lock(&dpm_list_mtx);
+                }
+                if (!list_empty(&dev->power.entry))
+                        list_move(&dev->power.entry, &list);
+                put_device(dev);
         }
+        list_splice(&list, &dpm_list);
         mutex_unlock(&dpm_list_mtx);
 }
 
 /**
  *      device_resume - Restore state of each device in system.
+ *      @state: PM transition of the system being carried out.
  *
  *      Resume all the devices, unlock them all, and allow new
  *      devices to be registered once again.
  */
-void device_resume(void)
+void device_resume(pm_message_t state)
 {
         might_sleep();
-        dpm_resume();
+        dpm_resume(state);
+        dpm_complete(state);
 }
 EXPORT_SYMBOL_GPL(device_resume);
 
 
 /*------------------------- Suspend routines -------------------------*/
 
-static inline char *suspend_verb(u32 event)
+/**
+ *      resume_event - return a PM message representing the resume event
+ *                     corresponding to given sleep state.
+ *      @sleep_state: PM message representing a sleep state.
+ */
+static pm_message_t resume_event(pm_message_t sleep_state)
 {
-        switch (event) {
-        case PM_EVENT_SUSPEND:  return "suspend";
-        case PM_EVENT_FREEZE:   return "freeze";
-        case PM_EVENT_PRETHAW:  return "prethaw";
-        default:                return "(unknown suspend event)";
+        switch (sleep_state.event) {
+        case PM_EVENT_SUSPEND:
+                return PMSG_RESUME;
+        case PM_EVENT_FREEZE:
+        case PM_EVENT_QUIESCE:
+                return PMSG_RECOVER;
+        case PM_EVENT_HIBERNATE:
+                return PMSG_RESTORE;
         }
-}
-
-static void
-suspend_device_dbg(struct device *dev, pm_message_t state, char *info)
-{
-        dev_dbg(dev, "%s%s%s\n", info, suspend_verb(state.event),
-                ((state.event == PM_EVENT_SUSPEND) && device_may_wakeup(dev)) ?
-                ", may wakeup" : "");
+        return PMSG_ON;
 }
 
 /**
- *      suspend_device_late - Shut down one device (late suspend).
+ *      suspend_device_noirq - Shut down one device (late suspend).
  *      @dev:   Device.
- *      @state: Power state device is entering.
+ *      @state: PM transition of the system being carried out.
  *
  *      This is called with interrupts off and only a single CPU running.
  */
-static int suspend_device_late(struct device *dev, pm_message_t state)
+static int suspend_device_noirq(struct device *dev, pm_message_t state)
 {
         int error = 0;
 
-        if (dev->bus && dev->bus->suspend_late) {
-                suspend_device_dbg(dev, state, "LATE ");
+        if (!dev->bus)
+                return 0;
+
+        if (dev->bus->pm) {
+                pm_dev_dbg(dev, state, "LATE ");
+                error = pm_noirq_op(dev, dev->bus->pm, state);
+        } else if (dev->bus->suspend_late) {
+                pm_dev_dbg(dev, state, "legacy LATE ");
                 error = dev->bus->suspend_late(dev, state);
                 suspend_report_result(dev->bus->suspend_late, error);
         }
@@ -278,37 +565,30 @@ static int suspend_device_late(struct device *dev, pm_message_t state)
 
 /**
  *      device_power_down - Shut down special devices.
- *      @state:         Power state to enter.
+ *      @state: PM transition of the system being carried out.
  *
- *      Power down devices that require interrupts to be disabled
- *      and move them from the dpm_off list to the dpm_off_irq list.
+ *      Power down devices that require interrupts to be disabled.
  *      Then power down system devices.
  *
  *      Must be called with interrupts disabled and only one CPU running.
  */
 int device_power_down(pm_message_t state)
 {
+        struct device *dev;
         int error = 0;
 
-        while (!list_empty(&dpm_off)) {
-                struct list_head *entry = dpm_off.prev;
-                struct device *dev = to_device(entry);
-
-                error = suspend_device_late(dev, state);
+        list_for_each_entry_reverse(dev, &dpm_list, power.entry) {
+                error = suspend_device_noirq(dev, state);
                 if (error) {
-                        printk(KERN_ERR "Could not power down device %s: "
-                                        "error %d\n",
-                                        kobject_name(&dev->kobj), error);
+                        pm_dev_err(dev, state, " late", error);
                         break;
                 }
-                if (!list_empty(&dev->power.entry))
-                        list_move(&dev->power.entry, &dpm_off_irq);
+                dev->power.status = DPM_OFF_IRQ;
         }
-
         if (!error)
                 error = sysdev_suspend(state);
         if (error)
-                dpm_power_up();
+                dpm_power_up(resume_event(state));
         return error;
 }
 EXPORT_SYMBOL_GPL(device_power_down);
@@ -316,7 +596,7 @@ EXPORT_SYMBOL_GPL(device_power_down);
 /**
  *      suspend_device - Save state of one device.
  *      @dev:   Device.
- *      @state: Power state device is entering.
+ *      @state: PM transition of the system being carried out.
  */
 static int suspend_device(struct device *dev, pm_message_t state)
 {
@@ -324,24 +604,43 @@ static int suspend_device(struct device *dev, pm_message_t state)
 
         down(&dev->sem);
 
-        if (dev->class && dev->class->suspend) {
-                suspend_device_dbg(dev, state, "class ");
-                error = dev->class->suspend(dev, state);
-                suspend_report_result(dev->class->suspend, error);
+        if (dev->class) {
+                if (dev->class->pm) {
+                        pm_dev_dbg(dev, state, "class ");
+                        error = pm_op(dev, dev->class->pm, state);
+                } else if (dev->class->suspend) {
+                        pm_dev_dbg(dev, state, "legacy class ");
+                        error = dev->class->suspend(dev, state);
+                        suspend_report_result(dev->class->suspend, error);
+                }
+                if (error)
+                        goto End;
         }
 
-        if (!error && dev->type && dev->type->suspend) {
-                suspend_device_dbg(dev, state, "type ");
-                error = dev->type->suspend(dev, state);
-                suspend_report_result(dev->type->suspend, error);
+        if (dev->type) {
+                if (dev->type->pm) {
+                        pm_dev_dbg(dev, state, "type ");
+                        error = pm_op(dev, dev->type->pm, state);
+                } else if (dev->type->suspend) {
+                        pm_dev_dbg(dev, state, "legacy type ");
+                        error = dev->type->suspend(dev, state);
+                        suspend_report_result(dev->type->suspend, error);
+                }
+                if (error)
+                        goto End;
         }
 
-        if (!error && dev->bus && dev->bus->suspend) {
-                suspend_device_dbg(dev, state, "");
-                error = dev->bus->suspend(dev, state);
-                suspend_report_result(dev->bus->suspend, error);
+        if (dev->bus) {
+                if (dev->bus->pm) {
+                        pm_dev_dbg(dev, state, "");
+                        error = pm_op(dev, &dev->bus->pm->base, state);
+                } else if (dev->bus->suspend) {
+                        pm_dev_dbg(dev, state, "legacy ");
+                        error = dev->bus->suspend(dev, state);
+                        suspend_report_result(dev->bus->suspend, error);
+                }
         }
-
+ End:
         up(&dev->sem);
 
         return error;
@@ -349,67 +648,139 @@ static int suspend_device(struct device *dev, pm_message_t state)
 
 /**
  *      dpm_suspend - Suspend every device.
- *      @state: Power state to put each device in.
- *
- *      Walk the dpm_locked list.  Suspend each device and move it
- *      to the dpm_off list.
+ *      @state: PM transition of the system being carried out.
  *
- *      (For historical reasons, if it returns -EAGAIN, that used to mean
- *      that the device would be called again with interrupts disabled.
- *      These days, we use the "suspend_late()" callback for that, so we
- *      print a warning and consider it an error).
+ *      Execute the appropriate "suspend" callbacks for all devices.
  */
 static int dpm_suspend(pm_message_t state)
 {
+        struct list_head list;
         int error = 0;
 
+        INIT_LIST_HEAD(&list);
         mutex_lock(&dpm_list_mtx);
-        while (!list_empty(&dpm_active)) {
-                struct list_head *entry = dpm_active.prev;
-                struct device *dev = to_device(entry);
+        while (!list_empty(&dpm_list)) {
+                struct device *dev = to_device(dpm_list.prev);
 
-                WARN_ON(dev->parent && dev->parent->power.sleeping);
-
-                dev->power.sleeping = true;
+                get_device(dev);
                 mutex_unlock(&dpm_list_mtx);
+
                 error = suspend_device(dev, state);
+
                 mutex_lock(&dpm_list_mtx);
                 if (error) {
-                        printk(KERN_ERR "Could not suspend device %s: "
-                                        "error %d%s\n",
-                                        kobject_name(&dev->kobj),
-                                        error,
-                                        (error == -EAGAIN ?
-                                        " (please convert to suspend_late)" :
-                                        ""));
-                        dev->power.sleeping = false;
+                        pm_dev_err(dev, state, "", error);
+                        put_device(dev);
                         break;
                 }
+                dev->power.status = DPM_OFF;
                 if (!list_empty(&dev->power.entry))
-                        list_move(&dev->power.entry, &dpm_off);
+                        list_move(&dev->power.entry, &list);
+                put_device(dev);
         }
-        if (!error)
-                all_sleeping = true;
+        list_splice(&list, dpm_list.prev);
         mutex_unlock(&dpm_list_mtx);
+        return error;
+}
+
+/**
+ *      prepare_device - Execute the ->prepare() callback(s) for given device.
+ *      @dev:   Device.
+ *      @state: PM transition of the system being carried out.
+ */
+static int prepare_device(struct device *dev, pm_message_t state)
+{
+        int error = 0;
+
+        down(&dev->sem);
+
+        if (dev->bus && dev->bus->pm && dev->bus->pm->base.prepare) {
+                pm_dev_dbg(dev, state, "preparing ");
+                error = dev->bus->pm->base.prepare(dev);
+                suspend_report_result(dev->bus->pm->base.prepare, error);
+                if (error)
+                        goto End;
+        }
+
+        if (dev->type && dev->type->pm && dev->type->pm->prepare) {
+                pm_dev_dbg(dev, state, "preparing type ");
+                error = dev->type->pm->prepare(dev);
+                suspend_report_result(dev->type->pm->prepare, error);
+                if (error)
+                        goto End;
+        }
+
+        if (dev->class && dev->class->pm && dev->class->pm->prepare) {
+                pm_dev_dbg(dev, state, "preparing class ");
+                error = dev->class->pm->prepare(dev);
+                suspend_report_result(dev->class->pm->prepare, error);
+        }
+ End:
+        up(&dev->sem);
+
+        return error;
+}
+
+/**
+ *      dpm_prepare - Prepare all devices for a PM transition.
+ *      @state: PM transition of the system being carried out.
+ *
+ *      Execute the ->prepare() callback for all devices.
+ */
+static int dpm_prepare(pm_message_t state)
+{
+        struct list_head list;
+        int error = 0;
+
+        INIT_LIST_HEAD(&list);
+        mutex_lock(&dpm_list_mtx);
+        transition_started = true;
+        while (!list_empty(&dpm_list)) {
+                struct device *dev = to_device(dpm_list.next);
+
+                get_device(dev);
+                dev->power.status = DPM_PREPARING;
+                mutex_unlock(&dpm_list_mtx);
 
+                error = prepare_device(dev, state);
+
+                mutex_lock(&dpm_list_mtx);
+                if (error) {
+                        dev->power.status = DPM_ON;
+                        if (error == -EAGAIN) {
+                                put_device(dev);
+                                continue;
+                        }
+                        printk(KERN_ERR "PM: Failed to prepare device %s "
+                                "for power transition: error %d\n",
+                                kobject_name(&dev->kobj), error);
+                        put_device(dev);
+                        break;
+                }
+                dev->power.status = DPM_SUSPENDING;
+                if (!list_empty(&dev->power.entry))
+                        list_move_tail(&dev->power.entry, &list);
+                put_device(dev);
+        }
+        list_splice(&list, &dpm_list);
+        mutex_unlock(&dpm_list_mtx);
         return error;
 }
 
 /**
  *      device_suspend - Save state and stop all devices in system.
- *      @state: new power management state
+ *      @state: PM transition of the system being carried out.
  *
- *      Prevent new devices from being registered, then lock all devices
- *      and suspend them.
+ *      Prepare and suspend all devices.
  */
 int device_suspend(pm_message_t state)
 {
         int error;
 
         might_sleep();
-        error = dpm_suspend(state);
-        if (error)
-                device_resume();
+        error = dpm_prepare(state);
+        if (!error)
+                error = dpm_suspend(state);
         return error;
 }
 EXPORT_SYMBOL_GPL(device_suspend);
diff --git a/drivers/base/power/power.h b/drivers/base/power/power.h
index a6894f2a4b99..a3252c0e2887 100644
--- a/drivers/base/power/power.h
+++ b/drivers/base/power/power.h
@@ -4,7 +4,7 @@
  * main.c
  */
 
-extern struct list_head dpm_active;     /* The active device list */
+extern struct list_head dpm_list;       /* The active device list */
 
 static inline struct device *to_device(struct list_head *entry)
 {
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index d11f74b038db..596aeecfdffe 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -6,9 +6,6 @@
 #include <linux/string.h>
 #include "power.h"
 
-int (*platform_enable_wakeup)(struct device *dev, int is_on);
-
-
 /*
  *      wakeup - Report/change current wakeup option for device
  *
diff --git a/drivers/base/power/trace.c b/drivers/base/power/trace.c
index 2b4b392dcbc1..2aa6e8fc4def 100644
--- a/drivers/base/power/trace.c
+++ b/drivers/base/power/trace.c
@@ -153,7 +153,7 @@ EXPORT_SYMBOL(set_trace_device);
  * it's not any guarantee, but it's a high _likelihood_ that
  * the match is valid).
  */
-void generate_resume_trace(void *tracedata, unsigned int user)
+void generate_resume_trace(const void *tracedata, unsigned int user)
 {
         unsigned short lineno = *(unsigned short *)tracedata;
         const char *file = *(const char **)(tracedata + 2);
@@ -188,13 +188,13 @@ static int show_file_hash(unsigned int value)
 static int show_dev_hash(unsigned int value)
 {
         int match = 0;
-        struct list_head * entry = dpm_active.prev;
+        struct list_head *entry = dpm_list.prev;
 
-        while (entry != &dpm_active) {
+        while (entry != &dpm_list) {
                 struct device * dev = to_device(entry);
                 unsigned int hash = hash_string(DEVSEED, dev->bus_id, DEVHASH);
                 if (hash == value) {
-                        printk("  hash matches device %s\n", dev->bus_id);
+                        dev_info(dev, "hash matches\n");
                         match++;
                 }
                 entry = entry->prev;
diff --git a/drivers/base/sys.c b/drivers/base/sys.c
index 358bb0be3c08..40fc14f03540 100644
--- a/drivers/base/sys.c
+++ b/drivers/base/sys.c
@@ -36,7 +36,7 @@ sysdev_show(struct kobject * kobj, struct attribute * attr, char * buffer)
         struct sysdev_attribute * sysdev_attr = to_sysdev_attr(attr);
 
         if (sysdev_attr->show)
-                return sysdev_attr->show(sysdev, buffer);
+                return sysdev_attr->show(sysdev, sysdev_attr, buffer);
         return -EIO;
 }
 
@@ -49,7 +49,7 @@ sysdev_store(struct kobject * kobj, struct attribute * attr,
         struct sysdev_attribute * sysdev_attr = to_sysdev_attr(attr);
 
         if (sysdev_attr->store)
-                return sysdev_attr->store(sysdev, buffer, count);
+                return sysdev_attr->store(sysdev, sysdev_attr, buffer, count);
         return -EIO;
 }
 
@@ -130,8 +130,8 @@ static struct kset *system_kset;
 
 int sysdev_class_register(struct sysdev_class * cls)
 {
-        pr_debug("Registering sysdev class '%s'\n",
-                 kobject_name(&cls->kset.kobj));
+        pr_debug("Registering sysdev class '%s'\n", cls->name);
+
         INIT_LIST_HEAD(&cls->drivers);
         memset(&cls->kset.kobj, 0x00, sizeof(struct kobject));
         cls->kset.kobj.parent = &system_kset->kobj;
@@ -241,7 +241,8 @@ int sysdev_register(struct sys_device * sysdev)
         if (!cls)
                 return -EINVAL;
 
-        pr_debug("Registering sys device '%s'\n", kobject_name(&sysdev->kobj));
+        pr_debug("Registering sys device of class '%s'\n",
+                 kobject_name(&cls->kset.kobj));
 
         /* initialize the kobject to 0, in case it had previously been used */
         memset(&sysdev->kobj, 0x00, sizeof(struct kobject));
@@ -257,6 +258,9 @@ int sysdev_register(struct sys_device * sysdev)
         if (!error) {
                 struct sysdev_driver * drv;
 
+                pr_debug("Registering sys device '%s'\n",
+                         kobject_name(&sysdev->kobj));
+
                 mutex_lock(&sysdev_drivers_lock);
                 /* Generic notification is implicit, because it's that
                  * code that should have called us.
@@ -269,6 +273,7 @@ int sysdev_register(struct sys_device * sysdev)
                 }
                 mutex_unlock(&sysdev_drivers_lock);
         }
+
         kobject_uevent(&sysdev->kobj, KOBJ_ADD);
         return error;
 }
@@ -474,3 +479,52 @@ int __init system_bus_init(void)
 
 EXPORT_SYMBOL_GPL(sysdev_register);
 EXPORT_SYMBOL_GPL(sysdev_unregister);
+
+#define to_ext_attr(x) container_of(x, struct sysdev_ext_attribute, attr)
+
+ssize_t sysdev_store_ulong(struct sys_device *sysdev,
+                           struct sysdev_attribute *attr,
+                           const char *buf, size_t size)
+{
+        struct sysdev_ext_attribute *ea = to_ext_attr(attr);
+        char *end;
+        unsigned long new = simple_strtoul(buf, &end, 0);
+        if (end == buf)
+                return -EINVAL;
+        *(unsigned long *)(ea->var) = new;
+        return end - buf;
+}
+EXPORT_SYMBOL_GPL(sysdev_store_ulong);
+
+ssize_t sysdev_show_ulong(struct sys_device *sysdev,
+                          struct sysdev_attribute *attr,
+                          char *buf)
+{
+        struct sysdev_ext_attribute *ea = to_ext_attr(attr);
+        return snprintf(buf, PAGE_SIZE, "%lx\n", *(unsigned long *)(ea->var));
+}
+EXPORT_SYMBOL_GPL(sysdev_show_ulong);
+
+ssize_t sysdev_store_int(struct sys_device *sysdev,
+                           struct sysdev_attribute *attr,
+                           const char *buf, size_t size)
+{
+        struct sysdev_ext_attribute *ea = to_ext_attr(attr);
+        char *end;
+        long new = simple_strtol(buf, &end, 0);
+        if (end == buf || new > INT_MAX || new < INT_MIN)
+                return -EINVAL;
+        *(int *)(ea->var) = new;
+        return end - buf;
+}
+EXPORT_SYMBOL_GPL(sysdev_store_int);
+
+ssize_t sysdev_show_int(struct sys_device *sysdev,
+                          struct sysdev_attribute *attr,
+                          char *buf)
+{
+        struct sysdev_ext_attribute *ea = to_ext_attr(attr);
+        return snprintf(buf, PAGE_SIZE, "%d\n", *(int *)(ea->var));
+}
+EXPORT_SYMBOL_GPL(sysdev_show_int);
+
diff --git a/drivers/base/topology.c b/drivers/base/topology.c
index fdf4044d2e74..199cd97e32e6 100644
--- a/drivers/base/topology.c
+++ b/drivers/base/topology.c
@@ -34,12 +34,14 @@
 static SYSDEV_ATTR(_name, 0444, show_##_name, NULL)
 
 #define define_id_show_func(name)                               \
-static ssize_t show_##name(struct sys_device *dev, char *buf)   \
+static ssize_t show_##name(struct sys_device *dev,              \
+                struct sysdev_attribute *attr, char *buf)       \
 {                                                               \
         unsigned int cpu = dev->id;                             \
         return sprintf(buf, "%d\n", topology_##name(cpu));      \
 }
 
+#if defined(topology_thread_siblings) || defined(topology_core_siblings)
 static ssize_t show_cpumap(int type, cpumask_t *mask, char *buf)
 {
         ptrdiff_t len = PTR_ALIGN(buf + PAGE_SIZE - 1, PAGE_SIZE) - buf;
@@ -54,65 +56,71 @@ static ssize_t show_cpumap(int type, cpumask_t *mask, char *buf)
         }
         return n;
 }
+#endif
 
+#ifdef arch_provides_topology_pointers
 #define define_siblings_show_map(name)                                  \
-static inline ssize_t show_##name(struct sys_device *dev, char *buf)    \
+static ssize_t show_##name(struct sys_device *dev,                      \
+                           struct sysdev_attribute *attr, char *buf)    \
 {                                                                       \
         unsigned int cpu = dev->id;                                     \
         return show_cpumap(0, &(topology_##name(cpu)), buf);            \
 }
 
 #define define_siblings_show_list(name)                                 \
-static inline ssize_t show_##name##_list(struct sys_device *dev, char *buf) \
+static ssize_t show_##name##_list(struct sys_device *dev,               \
+                                  struct sysdev_attribute *attr,        \
+                                  char *buf)                            \
 {                                                                       \
         unsigned int cpu = dev->id;                                     \
         return show_cpumap(1, &(topology_##name(cpu)), buf);            \
 }
 
+#else
+#define define_siblings_show_map(name)                                  \
+static ssize_t show_##name(struct sys_device *dev,                      \
+                           struct sysdev_attribute *attr, char *buf)    \
+{                                                                       \
+        unsigned int cpu = dev->id;                                     \
+        cpumask_t mask = topology_##name(cpu);                          \
+        return show_cpumap(0, &mask, buf);                              \
+}
+
+#define define_siblings_show_list(name)                                 \
+static ssize_t show_##name##_list(struct sys_device *dev,               \
+                                  struct sysdev_attribute *attr,        \
+                                  char *buf)                            \
+{                                                                       \
+        unsigned int cpu = dev->id;                                     \
+        cpumask_t mask = topology_##name(cpu);                          \
+        return show_cpumap(1, &mask, buf);                              \
+}
+#endif
+
 #define define_siblings_show_func(name)         \
         define_siblings_show_map(name); define_siblings_show_list(name)
 
-#ifdef  topology_physical_package_id
 define_id_show_func(physical_package_id);
 define_one_ro(physical_package_id);
-#define ref_physical_package_id_attr    &attr_physical_package_id.attr,
-#else
-#define ref_physical_package_id_attr
-#endif
 
-#ifdef topology_core_id
 define_id_show_func(core_id);
 define_one_ro(core_id);
-#define ref_core_id_attr                &attr_core_id.attr,
-#else
-#define ref_core_id_attr
-#endif
 
-#ifdef topology_thread_siblings
 define_siblings_show_func(thread_siblings);
 define_one_ro(thread_siblings);
 define_one_ro(thread_siblings_list);
-#define ref_thread_siblings_attr        \
-                &attr_thread_siblings.attr, &attr_thread_siblings_list.attr,
-#else
-#define ref_thread_siblings_attr
-#endif
 
-#ifdef topology_core_siblings
 define_siblings_show_func(core_siblings);
 define_one_ro(core_siblings);
 define_one_ro(core_siblings_list);
-#define ref_core_siblings_attr          \
-                &attr_core_siblings.attr, &attr_core_siblings_list.attr,
-#else
-#define ref_core_siblings_attr
-#endif
 
 static struct attribute *default_attrs[] = {
-        ref_physical_package_id_attr
-        ref_core_id_attr
-        ref_thread_siblings_attr
-        ref_core_siblings_attr
+        &attr_physical_package_id.attr,
+        &attr_core_id.attr,
+        &attr_thread_siblings.attr,
+        &attr_thread_siblings_list.attr,
+        &attr_core_siblings.attr,
+        &attr_core_siblings_list.attr,
         NULL
 };