/*
 * device.h - generic, centralized driver model
 *
 * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
 * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
 * Copyright (c) 2008-2009 Novell Inc.
 *
 * This file is released under the GPLv2
 *
 * See Documentation/driver-model/ for more information.
 */

#ifndef _DEVICE_H_
#define _DEVICE_H_

#include <linux/ioport.h>
#include <linux/kobject.h>
#include <linux/klist.h>
#include <linux/list.h>
#include <linux/lockdep.h>
#include <linux/compiler.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/pm.h>
#include <asm/atomic.h>
#include <asm/device.h>

struct device;
struct device_private;
struct device_driver;
struct driver_private;
struct class;
struct subsys_private;
struct bus_type;
struct device_node;

struct bus_attribute {
        struct attribute        attr;
        ssize_t (*show)(struct bus_type *bus, char *buf);
        ssize_t (*store)(struct bus_type *bus, const char *buf, size_t count);
};

#define BUS_ATTR(_name, _mode, _show, _store)   \
struct bus_attribute bus_attr_##_name = __ATTR(_name, _mode, _show, _store)

extern int __must_check bus_create_file(struct bus_type *,
                                        struct bus_attribute *);
extern void bus_remove_file(struct bus_type *, struct bus_attribute *);

struct bus_type {
        const char              *name;
        struct bus_attribute    *bus_attrs;
        struct device_attribute *dev_attrs;
        struct driver_attribute *drv_attrs;

        int (*match)(struct device *dev, struct device_driver *drv);
        int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
        int (*probe)(struct device *dev);
        int (*remove)(struct device *dev);
        void (*shutdown)(struct device *dev);

        int (*suspend)(struct device *dev, pm_message_t state);
        int (*resume)(struct device *dev);

        const struct dev_pm_ops *pm;

        struct subsys_private *p;
};

extern int __must_check bus_register(struct bus_type *bus);
extern void bus_unregister(struct bus_type *bus);

extern int __must_check bus_rescan_devices(struct bus_type *bus);

/* iterator helpers for buses */

int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data,
                     int (*fn)(struct device *dev, void *data));
struct device *bus_find_device(struct bus_type *bus, struct device *start,
                               void *data,
                               int (*match)(struct device *dev, void *data));
struct device *bus_find_device_by_name(struct bus_type *bus,
                                       struct device *start,
                                       const char *name);

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));
/*
 * Bus notifiers: Get notified of addition/removal of devices
 * and binding/unbinding of drivers to devices.
 * In the long run, it should be a replacement for the platform
 * notify hooks.
 */
struct notifier_block;

extern int bus_register_notifier(struct bus_type *bus,
                                 struct notifier_block *nb);
extern int bus_unregister_notifier(struct bus_type *bus,
                                   struct notifier_block *nb);

/* All 4 notifers below get called with the target struct device *
 * as an argument. Note that those functions are likely to be called
 * with the device lock held in the core, so be careful.
 */
#define BUS_NOTIFY_ADD_DEVICE           0x00000001 /* device added */
#define BUS_NOTIFY_DEL_DEVICE           0x00000002 /* device removed */
#define BUS_NOTIFY_BIND_DRIVER          0x00000003 /* driver about to be
                                                      bound */
#define BUS_NOTIFY_BOUND_DRIVER         0x00000004 /* driver bound to device */
#define BUS_NOTIFY_UNBIND_DRIVER        0x00000005 /* driver about to be
                                                      unbound */
#define BUS_NOTIFY_UNBOUND_DRIVER       0x00000006 /* driver is unbound
                                                      from the device */

extern struct kset *bus_get_kset(struct bus_type *bus);
extern struct klist *bus_get_device_klist(struct bus_type *bus);

struct device_driver {
        const char              *name;
        struct bus_type         *bus;

        struct module           *owner;
        const char              *mod_name;      /* used for built-in modules */

        bool suppress_bind_attrs;       /* disables bind/unbind via sysfs */

#if defined(CONFIG_OF)
        const struct of_device_id       *of_match_table;
#endif

        int (*probe) (struct device *dev);
        int (*remove) (struct device *dev);
        void (*shutdown) (struct device *dev);
        int (*suspend) (struct device *dev, pm_message_t state);
        int (*resume) (struct device *dev);
        const struct attribute_group **groups;

        const struct dev_pm_ops *pm;

        struct driver_private *p;
};


extern int __must_check driver_register(struct device_driver *drv);
extern void driver_unregister(struct device_driver *drv);

extern struct device_driver *get_driver(struct device_driver *drv);
extern void put_driver(struct device_driver *drv);
extern struct device_driver *driver_find(const char *name,
                                         struct bus_type *bus);
extern int driver_probe_done(void);
extern void wait_for_device_probe(void);


/* sysfs interface for exporting driver attributes */

struct driver_attribute {
        struct attribute attr;
        ssize_t (*show)(struct device_driver *driver, char *buf);
        ssize_t (*store)(struct device_driver *driver, const char *buf,
                         size_t count);
};

#define DRIVER_ATTR(_name, _mode, _show, _store)        \
struct driver_attribute driver_attr_##_name =           \
        __ATTR(_name, _mode, _show, _store)

extern int __must_check driver_create_file(struct device_driver *driver,
                                        const struct driver_attribute *attr);
extern void driver_remove_file(struct device_driver *driver,
                               const struct driver_attribute *attr);

extern int __must_check driver_add_kobj(struct device_driver *drv,
                                        struct kobject *kobj,
                                        const char *fmt, ...);

extern int __must_check driver_for_each_device(struct device_driver *drv,
                                               struct device *start,
                                               void *data,
                                               int (*fn)(struct device *dev,
                                                         void *));
struct device *driver_find_device(struct device_driver *drv,
                                  struct device *start, void *data,
                                  int (*match)(struct device *dev, void *data));

/*
 * device classes
 */
struct class {
        const char              *name;
        struct module           *owner;

        struct class_attribute          *class_attrs;
        struct device_attribute         *dev_attrs;
        struct bin_attribute            *dev_bin_attrs;
        struct kobject                  *dev_kobj;

        int (*dev_uevent)(struct device *dev, struct kobj_uevent_env *env);
        char *(*devnode)(struct device *dev, mode_t *mode);

        void (*class_release)(struct class *class);
        void (*dev_release)(struct device *dev);

        int (*suspend)(struct device *dev, pm_message_t state);
        int (*resume)(struct device *dev);

        const struct kobj_ns_type_operations *ns_type;
        const void *(*namespace)(struct device *dev);

        const struct dev_pm_ops *pm;

        struct subsys_private *p;
};

struct class_dev_iter {
        struct klist_iter               ki;
        const struct device_type        *type;
};

extern struct kobject *sysfs_dev_block_kobj;
extern struct kobject *sysfs_dev_char_kobj;
extern int __must_check __class_register(struct class *class,
                                         struct lock_class_key *key);
extern void class_unregister(struct class *class);

/* This is a #define to keep the compiler from merging different
 * instances of the __key variable */
#define class_register(class)                   \
({                                              \
        static struct lock_class_key __key;     \
        __class_register(class, &__key);        \
})

struct class_compat;
struct class_compat *class_compat_register(const char *name);
void class_compat_unregister(struct class_compat *cls);
int class_compat_create_link(struct class_compat *cls, struct device *dev,
                             struct device *device_link);
void class_compat_remove_link(struct class_compat *cls, struct device *dev,
                              struct device *device_link);

extern void class_dev_iter_init(struct class_dev_iter *iter,
                                struct class *class,
                                struct device *start,
                                const struct device_type *type);
extern struct device *class_dev_iter_next(struct class_dev_iter *iter);
extern void class_dev_iter_exit(struct class_dev_iter *iter);

extern int class_for_each_device(struct class *class, struct device *start,
                                 void *data,
                                 int (*fn)(struct device *dev, void *data));
extern struct device *class_find_device(struct class *class,
                                        struct device *start, void *data,
                                        int (*match)(struct device *, void *));

struct class_attribute {
        struct attribute attr;
        ssize_t (*show)(struct class *class, struct class_attribute *attr,
                        char *buf);
        ssize_t (*store)(struct class *class, struct class_attribute *attr,
                        const char *buf, size_t count);
};

#define CLASS_ATTR(_name, _mode, _show, _store)                 \
struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store)

extern int __must_check class_create_file(struct class *class,
                                          const struct class_attribute *attr);
extern void class_remove_file(struct class *class,
                              const struct class_attribute *attr);

/* Simple class attribute that is just a static string */

struct class_attribute_string {
        struct class_attribute attr;
        char *str;
};

/* Currently read-only only */
#define _CLASS_ATTR_STRING(_name, _mode, _str) \
        { __ATTR(_name, _mode, show_class_attr_string, NULL), _str }
#define CLASS_ATTR_STRING(_name, _mode, _str) \
        struct class_attribute_string class_attr_##_name = \
                _CLASS_ATTR_STRING(_name, _mode, _str)

extern ssize_t show_class_attr_string(struct class *class, struct class_attribute *attr,
                        char *buf);

struct class_interface {
        struct list_head        node;
        struct class            *class;

        int (*add_dev)          (struct device *, struct class_interface *);
        void (*remove_dev)      (struct device *, struct class_interface *);
};

extern int __must_check class_interface_register(struct class_interface *);
extern void class_interface_unregister(struct class_interface *);

extern struct class * __must_check __class_create(struct module *owner,
                                                  const char *name,
                                                  struct lock_class_key *key);
extern void class_destroy(struct class *cls);

/* This is a #define to keep the compiler from merging different
 * instances of the __key variable */
#define class_create(owner, name)               \
({                                              \
        static struct lock_class_key __key;     \
        __class_create(owner, name, &__key);    \
})

/*
 * The type of device, "struct device" is embedded in. A class
 * or bus can contain devices of different types
 * like "partitions" and "disks", "mouse" and "event".
 * This identifies the device type and carries type-specific
 * information, equivalent to the kobj_type of a kobject.
 * If "name" is specified, the uevent will contain it in
 * the DEVTYPE variable.
 */
struct device_type {
        const char *name;
        const struct attribute_group **groups;
        int (*uevent)(struct device *dev, struct kobj_uevent_env *env);
        char *(*devnode)(struct device *dev, mode_t *mode);
        void (*release)(struct device *dev);

        const struct dev_pm_ops *pm;
};

/* interface for exporting device attributes */
struct device_attribute {
        struct attribute        attr;
        ssize_t (*show)(struct device *dev, struct device_attribute *attr,
                        char *buf);
        ssize_t (*store)(struct device *dev, struct device_attribute *attr,
                         const char *buf, size_t count);
};

#define DEVICE_ATTR(_name, _mode, _show, _store) \
struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store)

extern int __must_check 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,
                                        const struct bin_attribute *attr);
extern void device_remove_bin_file(struct device *dev,
                                   const struct bin_attribute *attr);
extern int device_schedule_callback_owner(struct device *dev,
                void (*func)(struct device *dev), struct module *owner);

/* This is a macro to avoid include problems with THIS_MODULE */
#define device_schedule_callback(dev, func)                     \
        device_schedule_callback_owner(dev, func, THIS_MODULE)

/* device resource management */
typedef void (*dr_release_t)(struct device *dev, void *res);
typedef int (*dr_match_t)(struct device *dev, void *res, void *match_data);

#ifdef CONFIG_DEBUG_DEVRES
extern void *__devres_alloc(dr_release_t release, size_t size, gfp_t gfp,
                             const char *name);
#define devres_alloc(release, size, gfp) \
        __devres_alloc(release, size, gfp, #release)
#else
extern void *devres_alloc(dr_release_t release, size_t size, gfp_t gfp);
#endif
extern void devres_free(void *res);
extern void devres_add(struct device *dev, void *res);
extern void *devres_find(struct device *dev, dr_release_t release,
                         dr_match_t match, void *match_data);
extern void *devres_get(struct device *dev, void *new_res,
                        dr_match_t match, void *match_data);
extern void *devres_remove(struct device *dev, dr_release_t release,
                           dr_match_t match, void *match_data);
extern int devres_destroy(struct device *dev, dr_release_t release,
                          dr_match_t match, void *match_data);

/* devres group */
extern void * __must_check devres_open_group(struct device *dev, void *id,
                                             gfp_t gfp);
extern void devres_close_group(struct device *dev, void *id);
extern void devres_remove_group(struct device *dev, void *id);
extern int devres_release_group(struct device *dev, void *id);

/* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */
extern void *devm_kzalloc(struct device *dev, size_t size, gfp_t gfp);
extern void devm_kfree(struct device *dev, void *p);

struct device_dma_parameters {
        /*
         * a low level driver may set these to teach IOMMU code about
         * sg limitations.
         */
        unsigned int max_segment_size;
        unsigned long segment_boundary_mask;
};

struct device {
        struct device           *parent;

        struct device_private   *p;

        struct kobject kobj;
        const char              *init_name; /* initial name of the device */
        struct device_type      *type;

        struct mutex            mutex;  /* mutex to synchronize calls to
                                         * its driver.
                                         */

        struct bus_type *bus;           /* type of bus device is on */
        struct device_driver *driver;   /* which driver has allocated this
                                           device */
        void            *platform_data; /* Platform specific data, device
                                           core doesn't touch it */
        struct dev_pm_info      power;

#ifdef CONFIG_NUMA
        int             numa_node;      /* NUMA node this device is close to */
#endif
        u64             *dma_mask;      /* dma mask (if dma'able device) */
        u64             coherent_dma_mask;/* Like dma_mask, but for
                                             alloc_coherent mappings as
                                             not all hardware supports
                                             64 bit addresses for consistent
                                             allocations such descriptors. */

        struct device_dma_parameters *dma_parms;

        struct list_head        dma_pools;      /* dma pools (if dma'ble) */

        struct dma_coherent_mem *dma_mem; /* internal for coherent mem
                                             override */
        /* arch specific additions */
        struct dev_archdata     archdata;
#ifdef CONFIG_OF
        struct device_node      *of_node;
#endif

        dev_t                   devt;   /* dev_t, creates the sysfs "dev" */

        spinlock_t              devres_lock;
        struct list_head        devres_head;

        struct klist_node       knode_class;
        struct class            *class;
        const struct attribute_group **groups;  /* optional groups */

        void    (*release)(struct device *dev);
};

/* Get the wakeup routines, which depend on struct device */
#include <linux/pm_wakeup.h>

static inline const char *dev_name(const struct device *dev)
{
        /* Use the init name until the kobject becomes available */
        if (dev->init_name)
                return dev->init_name;

        return kobject_name(&dev->kobj);
}

extern int dev_set_name(struct device *dev, const char *name, ...)
                        __attribute__((format(printf, 2, 3)));

#ifdef CONFIG_NUMA
static inline int dev_to_node(struct device *dev)
{
        return dev->numa_node;
}
static inline void set_dev_node(struct device *dev, int node)
{
        dev->numa_node = node;
}
#else
static inline int dev_to_node(struct device *dev)
{
        return -1;
}
static inline void set_dev_node(struct device *dev, int node)
{
}
#endif

static inline unsigned int dev_get_uevent_suppress(const struct device *dev)
{
        return dev->kobj.uevent_suppress;
}

static inline void dev_set_uevent_suppress(struct device *dev, int val)
{
        dev->kobj.uevent_suppress = val;
}

static inline int device_is_registered(struct device *dev)
{
        return dev->kobj.state_in_sysfs;
}

static inline void device_enable_async_suspend(struct device *dev)
{
        if (!dev->power.in_suspend)
                dev->power.async_suspend = true;
}

static inline void device_disable_async_suspend(struct device *dev)
{
        if (!dev->power.in_suspend)
                dev->power.async_suspend = false;
}

static inline bool device_async_suspend_enabled(struct device *dev)
{
        return !!dev->power.async_suspend;
}

static inline void device_lock(struct device *dev)
{
        mutex_lock(&dev->mutex);
}

static inline int device_trylock(struct device *dev)
{
        return mutex_trylock(&dev->mutex);
}

static inline void device_unlock(struct device *dev)
{
        mutex_unlock(&dev->mutex);
}

void driver_init(void);

/*
 * High level routines for use by the bus drivers
 */
extern int __must_check device_register(struct device *dev);
extern void device_unregister(struct device *dev);
extern void device_initialize(struct device *dev);
extern int __must_check device_add(struct device *dev);
extern void device_del(struct device *dev);
extern int device_for_each_child(struct device *dev, void *data,
                     int (*fn)(struct device *dev, void *data));
extern struct device *device_find_child(struct device *dev, void *data,
                                int (*match)(struct device *dev, void *data));
extern int device_rename(struct device *dev, const char *new_name);
extern int device_move(struct device *dev, struct device *new_parent,
                       enum dpm_order dpm_order);
extern const char *device_get_devnode(struct device *dev,
                                      mode_t *mode, const char **tmp);
extern void *dev_get_drvdata(const struct device *dev);
extern void dev_set_drvdata(struct device *dev, void *data);

/*
 * Root device objects for grouping under /sys/devices
 */
extern struct device *__root_device_register(const char *name,
                                             struct module *owner);
static inline struct device *root_device_register(const char *name)
{
        return __root_device_register(name, THIS_MODULE);
}
extern void root_device_unregister(struct device *root);

static inline void *dev_get_platdata(const struct device *dev)
{
        return dev->platform_data;
}

/*
 * Manual binding of a device to driver. See drivers/base/bus.c
 * for information on use.
 */
extern int __must_check device_bind_driver(struct device *dev);
extern void device_release_driver(struct device *dev);
extern int  __must_check device_attach(struct device *dev);
extern int __must_check driver_attach(struct device_driver *drv);
extern int __must_check device_reprobe(struct device *dev);

/*
 * Easy functions for dynamically creating devices on the fly
 */
extern struct device *device_create_vargs(struct class *cls,
                                          struct device *parent,
                                          dev_t devt,
                                          void *drvdata,
                                          const char *fmt,
                                          va_list vargs);
extern struct device *device_create(struct class *cls, struct device *parent,
                                    dev_t devt, void *drvdata,
                                    const char *fmt, ...)
                                    __attribute__((format(printf, 5, 6)));
extern void device_destroy(struct class *cls, dev_t devt);

/*
 * Platform "fixup" functions - allow the platform to have their say
 * about devices and actions that the general device layer doesn't
 * know about.
 */
/* Notify platform of device discovery */
extern int (*platform_notify)(struct device *dev);

extern int (*platform_notify_remove)(struct device *dev);


/**
 * get_device - atomically increment the reference count for the device.
 *
 */
extern struct device *get_device(struct device *dev);
extern void put_device(struct device *dev);

extern void wait_for_device_probe(void);

#ifdef CONFIG_DEVTMPFS
extern int devtmpfs_create_node(struct device *dev);
extern int devtmpfs_delete_node(struct device *dev);
extern int devtmpfs_mount(const char *mntdir);
#else
static inline int devtmpfs_create_node(struct device *dev) { return 0; }
static inline int devtmpfs_delete_node(struct device *dev) { return 0; }
static inline int devtmpfs_mount(const char *mountpoint) { return 0; }
#endif

/* drivers/base/power/shutdown.c */
extern void device_shutdown(void);

/* drivers/base/sys.c */
extern void sysdev_shutdown(void);

/* debugging and troubleshooting/diagnostic helpers. */
extern const char *dev_driver_string(const struct device *dev);


#ifdef CONFIG_PRINTK

extern int dev_printk(const char *level, const struct device *dev,
                      const char *fmt, ...)
        __attribute__ ((format (printf, 3, 4)));
extern int dev_emerg(const struct device *dev, const char *fmt, ...)
        __attribute__ ((format (printf, 2, 3)));
extern int dev_alert(const struct device *dev, const char *fmt, ...)
        __attribute__ ((format (printf, 2, 3)));
extern int dev_crit(const struct device *dev, const char *fmt, ...)
        __attribute__ ((format (printf, 2, 3)));
extern int dev_err(const struct device *dev, const char *fmt, ...)
        __attribute__ ((format (printf, 2, 3)));
extern int dev_warn(const struct device *dev, const char *fmt, ...)
        __attribute__ ((format (printf, 2, 3)));
extern int dev_notice(const struct device *dev, const char *fmt, ...)
        __attribute__ ((format (printf, 2, 3)));
extern int _dev_info(const struct device *dev, const char *fmt, ...)
        __attribute__ ((format (printf, 2, 3)));

#else

static inline int dev_printk(const char *level, const struct device *dev,
                      const char *fmt, ...)
        __attribute__ ((format (printf, 3, 4)));
static inline int dev_printk(const char *level, const struct device *dev,
                      const char *fmt, ...)
         { return 0; }

static inline int dev_emerg(const struct device *dev, const char *fmt, ...)
        __attribute__ ((format (printf, 2, 3)));
static inline int dev_emerg(const struct device *dev, const char *fmt, ...)
        { return 0; }
static inline int dev_crit(const struct device *dev, const char *fmt, ...)
        __attribute__ ((format (printf, 2, 3)));
static inline int dev_crit(const struct device *dev, const char *fmt, ...)
        { return 0; }
static inline int dev_alert(const struct device *dev, const char *fmt, ...)
        __attribute__ ((format (printf, 2, 3)));
static inline int dev_alert(const struct device *dev, const char *fmt, ...)
        { return 0; }
static inline int dev_err(const struct device *dev, const char *fmt, ...)
        __attribute__ ((format (printf, 2, 3)));
static inline int dev_err(const struct device *dev, const char *fmt, ...)
        { return 0; }
static inline int dev_warn(const struct device *dev, const char *fmt, ...)
        __attribute__ ((format (printf, 2, 3)));
static inline int dev_warn(const struct device *dev, const char *fmt, ...)
        { return 0; }
static inline int dev_notice(const struct device *dev, const char *fmt, ...)
        __attribute__ ((format (printf, 2, 3)));
static inline int dev_notice(const struct device *dev, const char *fmt, ...)
        { return 0; }
static inline int _dev_info(const struct device *dev, const char *fmt, ...)
        __attribute__ ((format (printf, 2, 3)));
static inline int _dev_info(const struct device *dev, const char *fmt, ...)
        { return 0; }

#endif

/*
 * Stupid hackaround for existing uses of non-printk uses dev_info
 *
 * Note that the definition of dev_info below is actually _dev_info
 * and a macro is used to avoid redefining dev_info
 */

#define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg)

#if defined(DEBUG)
#define dev_dbg(dev, format, arg...)            \
        dev_printk(KERN_DEBUG, dev, format, ##arg)
#elif defined(CONFIG_DYNAMIC_DEBUG)
#define dev_dbg(dev, format, ...)                    \
do {                                                 \
        dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \
} while (0)
#else
#define dev_dbg(dev, format, arg...)                            \
({                                                              \
        if (0)                                                  \
                dev_printk(KERN_DEBUG, dev, format, ##arg);     \
        0;                                                      \
})
#endif

#ifdef VERBOSE_DEBUG
#define dev_vdbg        dev_dbg
#else
#define dev_vdbg(dev, format, arg...)                           \
({                                                              \
        if (0)                                                  \
                dev_printk(KERN_DEBUG, dev, format, ##arg);     \
        0;                                                      \
})
#endif

/*
 * dev_WARN() acts like dev_printk(), but with the key difference
 * of using a WARN/WARN_ON to get the message out, including the
 * file/line information and a backtrace.
 */
#define dev_WARN(dev, format, arg...) \
        WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg);

/* Create alias, so I can be autoloaded. */
#define MODULE_ALIAS_CHARDEV(major,minor) \
        MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor))
#define MODULE_ALIAS_CHARDEV_MAJOR(major) \
        MODULE_ALIAS("char-major-" __stringify(major) "-*")

#ifdef CONFIG_SYSFS_DEPRECATED
extern long sysfs_deprecated;
#else
#define sysfs_deprecated 0
#endif

#endif /* _DEVICE_H_ */