13 files changed, 257 insertions, 47 deletions

diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 6cb60fd2ea8..fc3da0d70d6 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -14,7 +14,7 @@
 #ifndef _LINUX_CPU_H_
 #define _LINUX_CPU_H_
 
-#include <linux/sysdev.h>
+#include <linux/device.h>
 #include <linux/node.h>
 #include <linux/compiler.h>
 #include <linux/cpumask.h>
@@ -22,19 +22,19 @@
 struct cpu {
         int node_id;            /* The node which contains the CPU */
         int hotpluggable;       /* creates sysfs control file if hotpluggable */
-        struct sys_device sysdev;
+        struct device dev;
 };
 
 extern int register_cpu(struct cpu *cpu, int num);
-extern struct sys_device *get_cpu_sysdev(unsigned cpu);
+extern struct device *get_cpu_device(unsigned cpu);
 
-extern int cpu_add_sysdev_attr(struct sysdev_attribute *attr);
-extern void cpu_remove_sysdev_attr(struct sysdev_attribute *attr);
+extern int cpu_add_dev_attr(struct device_attribute *attr);
+extern void cpu_remove_dev_attr(struct device_attribute *attr);
 
-extern int cpu_add_sysdev_attr_group(struct attribute_group *attrs);
-extern void cpu_remove_sysdev_attr_group(struct attribute_group *attrs);
+extern int cpu_add_dev_attr_group(struct attribute_group *attrs);
+extern void cpu_remove_dev_attr_group(struct attribute_group *attrs);
 
-extern int sched_create_sysfs_power_savings_entries(struct sysdev_class *cls);
+extern int sched_create_sysfs_power_savings_entries(struct device *dev);
 
 #ifdef CONFIG_HOTPLUG_CPU
 extern void unregister_cpu(struct cpu *cpu);
@@ -160,7 +160,7 @@ static inline void cpu_maps_update_done(void)
 }
 
 #endif /* CONFIG_SMP */
-extern struct sysdev_class cpu_sysdev_class;
+extern struct bus_type cpu_subsys;
 
 #ifdef CONFIG_HOTPLUG_CPU
 /* Stop CPUs going up and down. */
diff --git a/include/linux/debugfs.h b/include/linux/debugfs.h
index e7d9b20ddc5..e8c3abc6081 100644
--- a/include/linux/debugfs.h
+++ b/include/linux/debugfs.h
@@ -16,6 +16,7 @@
 #define _DEBUGFS_H_
 
 #include <linux/fs.h>
+#include <linux/seq_file.h>
 
 #include <linux/types.h>
 
@@ -26,6 +27,17 @@ struct debugfs_blob_wrapper {
         unsigned long size;
 };
 
+struct debugfs_reg32 {
+        char *name;
+        unsigned long offset;
+};
+
+struct debugfs_regset32 {
+        struct debugfs_reg32 *regs;
+        int nregs;
+        void __iomem *base;
+};
+
 extern struct dentry *arch_debugfs_dir;
 
 #if defined(CONFIG_DEBUG_FS)
@@ -74,6 +86,13 @@ struct dentry *debugfs_create_blob(const char *name, mode_t mode,
                                   struct dentry *parent,
                                   struct debugfs_blob_wrapper *blob);
 
+struct dentry *debugfs_create_regset32(const char *name, mode_t mode,
+                                     struct dentry *parent,
+                                     struct debugfs_regset32 *regset);
+
+int debugfs_print_regs32(struct seq_file *s, const struct debugfs_reg32 *regs,
+                         int nregs, void __iomem *base, char *prefix);
+
 bool debugfs_initialized(void);
 
 #else
@@ -188,6 +207,13 @@ static inline struct dentry *debugfs_create_blob(const char *name, mode_t mode,
         return ERR_PTR(-ENODEV);
 }
 
+static inline struct dentry *debugfs_create_regset32(const char *name,
+                                   mode_t mode, struct dentry *parent,
+                                   struct debugfs_regset32 *regset)
+{
+        return ERR_PTR(-ENODEV);
+}
+
 static inline bool debugfs_initialized(void)
 {
         return false;
diff --git a/include/linux/device.h b/include/linux/device.h
index 3136ede5a1e..96acef8dd91 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -53,6 +53,8 @@ extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
  * struct bus_type - The bus type of the device
  *
  * @name:       The name of the bus.
+ * @dev_name:   Used for subsystems to enumerate devices like ("foo%u", dev->id).
+ * @dev_root:   Default device to use as the parent.
  * @bus_attrs:  Default attributes of the bus.
  * @dev_attrs:  Default attributes of the devices on the bus.
  * @drv_attrs:  Default attributes of the device drivers on the bus.
@@ -86,6 +88,8 @@ extern void bus_remove_file(struct bus_type *, struct bus_attribute *);
  */
 struct bus_type {
         const char              *name;
+        const char              *dev_name;
+        struct device           *dev_root;
         struct bus_attribute    *bus_attrs;
         struct device_attribute *dev_attrs;
         struct driver_attribute *drv_attrs;
@@ -106,12 +110,30 @@ struct bus_type {
         struct subsys_private *p;
 };
 
-extern int __must_check bus_register(struct bus_type *bus);
+/* This is a #define to keep the compiler from merging different
+ * instances of the __key variable */
+#define bus_register(subsys)                    \
+({                                              \
+        static struct lock_class_key __key;     \
+        __bus_register(subsys, &__key); \
+})
+extern int __must_check __bus_register(struct bus_type *bus,
+                                       struct lock_class_key *key);
 extern void bus_unregister(struct bus_type *bus);
 
 extern int __must_check bus_rescan_devices(struct bus_type *bus);
 
 /* iterator helpers for buses */
+struct subsys_dev_iter {
+        struct klist_iter               ki;
+        const struct device_type        *type;
+};
+void subsys_dev_iter_init(struct subsys_dev_iter *iter,
+                         struct bus_type *subsys,
+                         struct device *start,
+                         const struct device_type *type);
+struct device *subsys_dev_iter_next(struct subsys_dev_iter *iter);
+void subsys_dev_iter_exit(struct subsys_dev_iter *iter);
 
 int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data,
                      int (*fn)(struct device *dev, void *data));
@@ -121,10 +143,10 @@ struct device *bus_find_device(struct bus_type *bus, struct device *start,
 struct device *bus_find_device_by_name(struct bus_type *bus,
                                        struct device *start,
                                        const char *name);
-
+struct device *subsys_find_device_by_id(struct bus_type *bus, unsigned int id,
+                                        struct device *hint);
 int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,
                      void *data, int (*fn)(struct device_driver *, void *));
-
 void bus_sort_breadthfirst(struct bus_type *bus,
                            int (*compare)(const struct device *a,
                                           const struct device *b));
@@ -256,6 +278,33 @@ struct device *driver_find_device(struct device_driver *drv,
                                   int (*match)(struct device *dev, void *data));
 
 /**
+ * struct subsys_interface - interfaces to device functions
+ * @name        name of the device function
+ * @subsystem   subsytem of the devices to attach to
+ * @node        the list of functions registered at the subsystem
+ * @add         device hookup to device function handler
+ * @remove      device hookup to device function handler
+ *
+ * Simple interfaces attached to a subsystem. Multiple interfaces can
+ * attach to a subsystem and its devices. Unlike drivers, they do not
+ * exclusively claim or control devices. Interfaces usually represent
+ * a specific functionality of a subsystem/class of devices.
+ */
+struct subsys_interface {
+        const char *name;
+        struct bus_type *subsys;
+        struct list_head node;
+        int (*add_dev)(struct device *dev, struct subsys_interface *sif);
+        int (*remove_dev)(struct device *dev, struct subsys_interface *sif);
+};
+
+int subsys_interface_register(struct subsys_interface *sif);
+void subsys_interface_unregister(struct subsys_interface *sif);
+
+int subsys_system_register(struct bus_type *subsys,
+                           const struct attribute_group **groups);
+
+/**
  * struct class - device classes
  * @name:       Name of the class.
  * @owner:      The module owner.
@@ -438,11 +487,31 @@ struct device_attribute {
                          const char *buf, size_t count);
 };
 
-#define DEVICE_ATTR(_name, _mode, _show, _store) \
-struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store)
+struct dev_ext_attribute {
+        struct device_attribute attr;
+        void *var;
+};
+
+ssize_t device_show_ulong(struct device *dev, struct device_attribute *attr,
+                          char *buf);
+ssize_t device_store_ulong(struct device *dev, struct device_attribute *attr,
+                           const char *buf, size_t count);
+ssize_t device_show_int(struct device *dev, struct device_attribute *attr,
+                        char *buf);
+ssize_t device_store_int(struct device *dev, struct device_attribute *attr,
+                         const char *buf, size_t count);
 
-extern int __must_check device_create_file(struct device *device,
-                                        const struct device_attribute *entry);
+#define DEVICE_ATTR(_name, _mode, _show, _store) \
+        struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store)
+#define DEVICE_ULONG_ATTR(_name, _mode, _var) \
+        struct dev_ext_attribute dev_attr_##_name = \
+                { __ATTR(_name, _mode, device_show_ulong, device_store_ulong), &(_var) }
+#define DEVICE_INT_ATTR(_name, _mode, _var) \
+        struct dev_ext_attribute dev_attr_##_name = \
+                { __ATTR(_name, _mode, device_show_ulong, device_store_ulong), &(_var) }
+
+extern int device_create_file(struct device *device,
+                              const struct device_attribute *entry);
 extern void device_remove_file(struct device *dev,
                                const struct device_attribute *attr);
 extern int __must_check device_create_bin_file(struct device *dev,
@@ -490,6 +559,9 @@ extern int devres_release_group(struct device *dev, void *id);
 extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp);
 extern void devm_kfree(struct device *dev, void *p);
 
+void __iomem *devm_request_and_ioremap(struct device *dev,
+                        struct resource *res);
+
 struct device_dma_parameters {
         /*
          * a low level driver may set these to teach IOMMU code about
@@ -600,6 +672,7 @@ struct device {
         struct device_node      *of_node; /* associated device tree node */
 
         dev_t                   devt;   /* dev_t, creates the sysfs "dev" */
+        u32                     id;     /* device instance */
 
         spinlock_t              devres_lock;
         struct list_head        devres_head;
@@ -924,4 +997,25 @@ extern long sysfs_deprecated;
 #define sysfs_deprecated 0
 #endif
 
+/**
+ * module_driver() - Helper macro for drivers that don't do anything
+ * special in module init/exit. This eliminates a lot of boilerplate.
+ * Each module may only use this macro once, and calling it replaces
+ * module_init() and module_exit().
+ *
+ * Use this macro to construct bus specific macros for registering
+ * drivers, and do not use it on its own.
+ */
+#define module_driver(__driver, __register, __unregister) \
+static int __init __driver##_init(void) \
+{ \
+        return __register(&(__driver)); \
+} \
+module_init(__driver##_init); \
+static void __exit __driver##_exit(void) \
+{ \
+        __unregister(&(__driver)); \
+} \
+module_exit(__driver##_exit);
+
 #endif /* _DEVICE_H_ */
diff --git a/include/linux/edac.h b/include/linux/edac.h
index 055b248bdd5..1cd3947987e 100644
--- a/include/linux/edac.h
+++ b/include/linux/edac.h
@@ -13,7 +13,7 @@
 #define _LINUX_EDAC_H_
 
 #include <linux/atomic.h>
-#include <linux/sysdev.h>
+#include <linux/device.h>
 
 #define EDAC_OPSTATE_INVAL      -1
 #define EDAC_OPSTATE_POLL       0
@@ -23,12 +23,12 @@
 extern int edac_op_state;
 extern int edac_err_assert;
 extern atomic_t edac_handlers;
-extern struct sysdev_class edac_class;
+extern struct bus_type edac_subsys;
 
 extern int edac_handler_set(void);
 extern void edac_atomic_assert_error(void);
-extern struct sysdev_class *edac_get_sysfs_class(void);
-extern void edac_put_sysfs_class(void);
+extern struct bus_type *edac_get_sysfs_subsys(void);
+extern void edac_put_sysfs_subsys(void);
 
 static inline void opstate_init(void)
 {
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 07d103a06d6..8e25a9167f1 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -482,6 +482,19 @@ static inline int i2c_adapter_id(struct i2c_adapter *adap)
 {
         return adap->nr;
 }
+
+/**
+ * module_i2c_driver() - Helper macro for registering a I2C driver
+ * @__i2c_driver: i2c_driver struct
+ *
+ * Helper macro for I2C drivers which do not do anything special in module
+ * init/exit. This eliminates a lot of boilerplate. Each module may only
+ * use this macro once, and calling it replaces module_init() and module_exit()
+ */
+#define module_i2c_driver(__i2c_driver) \
+        module_driver(__i2c_driver, i2c_add_driver, \
+                        i2c_del_driver)
+
 #endif /* I2C */
 #endif /* __KERNEL__ */
 
diff --git a/include/linux/kobject.h b/include/linux/kobject.h
index ad81e1c5148..fc615a97e2d 100644
--- a/include/linux/kobject.h
+++ b/include/linux/kobject.h
@@ -191,8 +191,6 @@ static inline struct kobj_type *get_ktype(struct kobject *kobj)
 }
 
 extern struct kobject *kset_find_obj(struct kset *, const char *);
-extern struct kobject *kset_find_obj_hinted(struct kset *, const char *,
-                                                struct kobject *);
 
 /* The global /sys/kernel/ kobject for people to chain off of */
 extern struct kobject *kernel_kobj;
diff --git a/include/linux/kref.h b/include/linux/kref.h
index d4a62ab2ee5..abc0120b09b 100644
--- a/include/linux/kref.h
+++ b/include/linux/kref.h
@@ -15,16 +15,81 @@
 #ifndef _KREF_H_
 #define _KREF_H_
 
-#include <linux/types.h>
+#include <linux/bug.h>
+#include <linux/atomic.h>
 
 struct kref {
         atomic_t refcount;
 };
 
-void kref_init(struct kref *kref);
-void kref_get(struct kref *kref);
-int kref_put(struct kref *kref, void (*release) (struct kref *kref));
-int kref_sub(struct kref *kref, unsigned int count,
-             void (*release) (struct kref *kref));
+/**
+ * kref_init - initialize object.
+ * @kref: object in question.
+ */
+static inline void kref_init(struct kref *kref)
+{
+        atomic_set(&kref->refcount, 1);
+}
+
+/**
+ * kref_get - increment refcount for object.
+ * @kref: object.
+ */
+static inline void kref_get(struct kref *kref)
+{
+        WARN_ON(!atomic_read(&kref->refcount));
+        atomic_inc(&kref->refcount);
+}
 
+/**
+ * kref_sub - subtract a number of refcounts for object.
+ * @kref: object.
+ * @count: Number of recounts to subtract.
+ * @release: pointer to the function that will clean up the object when the
+ *           last reference to the object is released.
+ *           This pointer is required, and it is not acceptable to pass kfree
+ *           in as this function.  If the caller does pass kfree to this
+ *           function, you will be publicly mocked mercilessly by the kref
+ *           maintainer, and anyone else who happens to notice it.  You have
+ *           been warned.
+ *
+ * Subtract @count from the refcount, and if 0, call release().
+ * Return 1 if the object was removed, otherwise return 0.  Beware, if this
+ * function returns 0, you still can not count on the kref from remaining in
+ * memory.  Only use the return value if you want to see if the kref is now
+ * gone, not present.
+ */
+static inline int kref_sub(struct kref *kref, unsigned int count,
+             void (*release)(struct kref *kref))
+{
+        WARN_ON(release == NULL);
+
+        if (atomic_sub_and_test((int) count, &kref->refcount)) {
+                release(kref);
+                return 1;
+        }
+        return 0;
+}
+
+/**
+ * kref_put - decrement refcount for object.
+ * @kref: object.
+ * @release: pointer to the function that will clean up the object when the
+ *           last reference to the object is released.
+ *           This pointer is required, and it is not acceptable to pass kfree
+ *           in as this function.  If the caller does pass kfree to this
+ *           function, you will be publicly mocked mercilessly by the kref
+ *           maintainer, and anyone else who happens to notice it.  You have
+ *           been warned.
+ *
+ * Decrement the refcount, and if 0, call release().
+ * Return 1 if the object was removed, otherwise return 0.  Beware, if this
+ * function returns 0, you still can not count on the kref from remaining in
+ * memory.  Only use the return value if you want to see if the kref is now
+ * gone, not present.
+ */
+static inline int kref_put(struct kref *kref, void (*release)(struct kref *kref))
+{
+        return kref_sub(kref, 1, release);
+}
 #endif /* _KREF_H_ */
diff --git a/include/linux/memory.h b/include/linux/memory.h
index 935699b30b7..1ac7f6e405f 100644
--- a/include/linux/memory.h
+++ b/include/linux/memory.h
@@ -15,7 +15,6 @@
 #ifndef _LINUX_MEMORY_H_
 #define _LINUX_MEMORY_H_
 
-#include <linux/sysdev.h>
 #include <linux/node.h>
 #include <linux/compiler.h>
 #include <linux/mutex.h>
@@ -38,7 +37,7 @@ struct memory_block {
         int phys_device;                /* to which fru does this belong? */
         void *hw;                       /* optional pointer to fw/hw data */
         int (*phys_callback)(struct memory_block *);
-        struct sys_device sysdev;
+        struct device dev;
 };
 
 int arch_get_memory_phys_device(unsigned long start_pfn);
diff --git a/include/linux/node.h b/include/linux/node.h
index 92370e22343..624e53cecc0 100644
--- a/include/linux/node.h
+++ b/include/linux/node.h
@@ -14,12 +14,12 @@
 #ifndef _LINUX_NODE_H_
 #define _LINUX_NODE_H_
 
-#include <linux/sysdev.h>
+#include <linux/device.h>
 #include <linux/cpumask.h>
 #include <linux/workqueue.h>
 
 struct node {
-        struct sys_device       sysdev;
+        struct device   dev;
 
 #if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HUGETLBFS)
         struct work_struct      node_work;
@@ -80,6 +80,6 @@ static inline void register_hugetlbfs_with_node(node_registration_func_t reg,
 }
 #endif
 
-#define to_node(sys_device) container_of(sys_device, struct node, sysdev)
+#define to_node(device) container_of(device, struct node, dev)
 
 #endif /* _LINUX_NODE_H_ */
diff --git a/include/linux/platform_device.h b/include/linux/platform_device.h
index 2a23f7d1a82..5622fa24e97 100644
--- a/include/linux/platform_device.h
+++ b/include/linux/platform_device.h
@@ -63,7 +63,7 @@ struct platform_device_info {
                 u64 dma_mask;
 };
 extern struct platform_device *platform_device_register_full(
-                struct platform_device_info *pdevinfo);
+                const struct platform_device_info *pdevinfo);
 
 /**
  * platform_device_register_resndata - add a platform-level device with
@@ -196,16 +196,8 @@ static inline void platform_set_drvdata(struct platform_device *pdev, void *data
  * calling it replaces module_init() and module_exit()
  */
 #define module_platform_driver(__platform_driver) \
-static int __init __platform_driver##_init(void) \
-{ \
-        return platform_driver_register(&(__platform_driver)); \
-} \
-module_init(__platform_driver##_init); \
-static void __exit __platform_driver##_exit(void) \
-{ \
-        platform_driver_unregister(&(__platform_driver)); \
-} \
-module_exit(__platform_driver##_exit);
+        module_driver(__platform_driver, platform_driver_register, \
+                        platform_driver_unregister)
 
 extern struct platform_device *platform_create_bundle(struct platform_driver *driver,
                                         int (*probe)(struct platform_device *),
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index bb4f5fbbbd8..176fce9cc6b 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -200,6 +200,17 @@ static inline void spi_unregister_driver(struct spi_driver *sdrv)
                 driver_unregister(&sdrv->driver);
 }
 
+/**
+ * module_spi_driver() - Helper macro for registering a SPI driver
+ * @__spi_driver: spi_driver struct
+ *
+ * Helper macro for SPI drivers which do not do anything special in module
+ * init/exit. This eliminates a lot of boilerplate. Each module may only
+ * use this macro once, and calling it replaces module_init() and module_exit()
+ */
+#define module_spi_driver(__spi_driver) \
+        module_driver(__spi_driver, spi_register_driver, \
+                        spi_unregister_driver)
 
 /**
  * struct spi_master - interface to SPI master controller
diff --git a/include/linux/usb.h b/include/linux/usb.h
index d3d0c137433..5d258c3180a 100644
--- a/include/linux/usb.h
+++ b/include/linux/usb.h
@@ -953,6 +953,18 @@ extern int usb_register_driver(struct usb_driver *, struct module *,
 
 extern void usb_deregister(struct usb_driver *);
 
+/**
+ * module_usb_driver() - Helper macro for registering a USB driver
+ * @__usb_driver: usb_driver struct
+ *
+ * Helper macro for USB drivers which do not do anything special in module
+ * init/exit. This eliminates a lot of boilerplate. Each module may only
+ * use this macro once, and calling it replaces module_init() and module_exit()
+ */
+#define module_usb_driver(__usb_driver) \
+        module_driver(__usb_driver, usb_register, \
+                       usb_deregister)
+
 extern int usb_register_device_driver(struct usb_device_driver *,
                         struct module *);
 extern void usb_deregister_device_driver(struct usb_device_driver *);
diff --git a/include/xen/balloon.h b/include/xen/balloon.h
index d29c153705b..cc2e1a7e44e 100644
--- a/include/xen/balloon.h
+++ b/include/xen/balloon.h
@@ -29,11 +29,11 @@ int alloc_xenballooned_pages(int nr_pages, struct page **pages,
                 bool highmem);
 void free_xenballooned_pages(int nr_pages, struct page **pages);
 
-struct sys_device;
+struct device;
 #ifdef CONFIG_XEN_SELFBALLOONING
-extern int register_xen_selfballooning(struct sys_device *sysdev);
+extern int register_xen_selfballooning(struct device *dev);
 #else
-static inline int register_xen_selfballooning(struct sys_device *sysdev)
+static inline int register_xen_selfballooning(struct device *dev)
 {
         return -ENOSYS;
 }