2 * device.h - generic, centralized driver model
4 * Copyright (c) 2001-2003 Patrick Mochel <mochel@osdl.org>
5 * Copyright (c) 2004-2009 Greg Kroah-Hartman <gregkh@suse.de>
6 * Copyright (c) 2008-2009 Novell Inc.
8 * This file is released under the GPLv2
10 * See Documentation/driver-model/ for more information.
16 #include <linux/ioport.h>
17 #include <linux/kobject.h>
18 #include <linux/klist.h>
19 #include <linux/list.h>
20 #include <linux/lockdep.h>
21 #include <linux/compiler.h>
22 #include <linux/types.h>
23 #include <linux/module.h>
25 #include <asm/atomic.h>
26 #include <asm/device.h>
29 struct device_private
;
31 struct driver_private
;
33 struct subsys_private
;
37 struct bus_attribute
{
38 struct attribute attr
;
39 ssize_t (*show
)(struct bus_type
*bus
, char *buf
);
40 ssize_t (*store
)(struct bus_type
*bus
, const char *buf
, size_t count
);
43 #define BUS_ATTR(_name, _mode, _show, _store) \
44 struct bus_attribute bus_attr_##_name = __ATTR(_name, _mode, _show, _store)
46 extern int __must_check
bus_create_file(struct bus_type
*,
47 struct bus_attribute
*);
48 extern void bus_remove_file(struct bus_type
*, struct bus_attribute
*);
52 struct bus_attribute
*bus_attrs
;
53 struct device_attribute
*dev_attrs
;
54 struct driver_attribute
*drv_attrs
;
56 int (*match
)(struct device
*dev
, struct device_driver
*drv
);
57 int (*uevent
)(struct device
*dev
, struct kobj_uevent_env
*env
);
58 int (*probe
)(struct device
*dev
);
59 int (*remove
)(struct device
*dev
);
60 void (*shutdown
)(struct device
*dev
);
62 int (*suspend
)(struct device
*dev
, pm_message_t state
);
63 int (*resume
)(struct device
*dev
);
65 const struct dev_pm_ops
*pm
;
67 struct subsys_private
*p
;
70 extern int __must_check
bus_register(struct bus_type
*bus
);
71 extern void bus_unregister(struct bus_type
*bus
);
73 extern int __must_check
bus_rescan_devices(struct bus_type
*bus
);
75 /* iterator helpers for buses */
77 int bus_for_each_dev(struct bus_type
*bus
, struct device
*start
, void *data
,
78 int (*fn
)(struct device
*dev
, void *data
));
79 struct device
*bus_find_device(struct bus_type
*bus
, struct device
*start
,
81 int (*match
)(struct device
*dev
, void *data
));
82 struct device
*bus_find_device_by_name(struct bus_type
*bus
,
86 int bus_for_each_drv(struct bus_type
*bus
, struct device_driver
*start
,
87 void *data
, int (*fn
)(struct device_driver
*, void *));
89 void bus_sort_breadthfirst(struct bus_type
*bus
,
90 int (*compare
)(const struct device
*a
,
91 const struct device
*b
));
93 * Bus notifiers: Get notified of addition/removal of devices
94 * and binding/unbinding of drivers to devices.
95 * In the long run, it should be a replacement for the platform
98 struct notifier_block
;
100 extern int bus_register_notifier(struct bus_type
*bus
,
101 struct notifier_block
*nb
);
102 extern int bus_unregister_notifier(struct bus_type
*bus
,
103 struct notifier_block
*nb
);
105 /* All 4 notifers below get called with the target struct device *
106 * as an argument. Note that those functions are likely to be called
107 * with the device lock held in the core, so be careful.
109 #define BUS_NOTIFY_ADD_DEVICE 0x00000001 /* device added */
110 #define BUS_NOTIFY_DEL_DEVICE 0x00000002 /* device removed */
111 #define BUS_NOTIFY_BIND_DRIVER 0x00000003 /* driver about to be
113 #define BUS_NOTIFY_BOUND_DRIVER 0x00000004 /* driver bound to device */
114 #define BUS_NOTIFY_UNBIND_DRIVER 0x00000005 /* driver about to be
116 #define BUS_NOTIFY_UNBOUND_DRIVER 0x00000006 /* driver is unbound
119 extern struct kset
*bus_get_kset(struct bus_type
*bus
);
120 extern struct klist
*bus_get_device_klist(struct bus_type
*bus
);
122 struct device_driver
{
124 struct bus_type
*bus
;
126 struct module
*owner
;
127 const char *mod_name
; /* used for built-in modules */
129 bool suppress_bind_attrs
; /* disables bind/unbind via sysfs */
131 const struct of_device_id
*of_match_table
;
133 int (*probe
) (struct device
*dev
);
134 int (*remove
) (struct device
*dev
);
135 void (*shutdown
) (struct device
*dev
);
136 int (*suspend
) (struct device
*dev
, pm_message_t state
);
137 int (*resume
) (struct device
*dev
);
138 const struct attribute_group
**groups
;
140 const struct dev_pm_ops
*pm
;
142 struct driver_private
*p
;
146 extern int __must_check
driver_register(struct device_driver
*drv
);
147 extern void driver_unregister(struct device_driver
*drv
);
149 extern struct device_driver
*get_driver(struct device_driver
*drv
);
150 extern void put_driver(struct device_driver
*drv
);
151 extern struct device_driver
*driver_find(const char *name
,
152 struct bus_type
*bus
);
153 extern int driver_probe_done(void);
154 extern void wait_for_device_probe(void);
157 /* sysfs interface for exporting driver attributes */
159 struct driver_attribute
{
160 struct attribute attr
;
161 ssize_t (*show
)(struct device_driver
*driver
, char *buf
);
162 ssize_t (*store
)(struct device_driver
*driver
, const char *buf
,
166 #define DRIVER_ATTR(_name, _mode, _show, _store) \
167 struct driver_attribute driver_attr_##_name = \
168 __ATTR(_name, _mode, _show, _store)
170 extern int __must_check
driver_create_file(struct device_driver
*driver
,
171 const struct driver_attribute
*attr
);
172 extern void driver_remove_file(struct device_driver
*driver
,
173 const struct driver_attribute
*attr
);
175 extern int __must_check
driver_add_kobj(struct device_driver
*drv
,
176 struct kobject
*kobj
,
177 const char *fmt
, ...);
179 extern int __must_check
driver_for_each_device(struct device_driver
*drv
,
180 struct device
*start
,
182 int (*fn
)(struct device
*dev
,
184 struct device
*driver_find_device(struct device_driver
*drv
,
185 struct device
*start
, void *data
,
186 int (*match
)(struct device
*dev
, void *data
));
193 struct module
*owner
;
195 struct class_attribute
*class_attrs
;
196 struct device_attribute
*dev_attrs
;
197 struct bin_attribute
*dev_bin_attrs
;
198 struct kobject
*dev_kobj
;
200 int (*dev_uevent
)(struct device
*dev
, struct kobj_uevent_env
*env
);
201 char *(*devnode
)(struct device
*dev
, mode_t
*mode
);
203 void (*class_release
)(struct class *class);
204 void (*dev_release
)(struct device
*dev
);
206 int (*suspend
)(struct device
*dev
, pm_message_t state
);
207 int (*resume
)(struct device
*dev
);
209 const struct kobj_ns_type_operations
*ns_type
;
210 const void *(*namespace)(struct device
*dev
);
212 const struct dev_pm_ops
*pm
;
214 struct subsys_private
*p
;
217 struct class_dev_iter
{
218 struct klist_iter ki
;
219 const struct device_type
*type
;
222 extern struct kobject
*sysfs_dev_block_kobj
;
223 extern struct kobject
*sysfs_dev_char_kobj
;
224 extern int __must_check
__class_register(struct class *class,
225 struct lock_class_key
*key
);
226 extern void class_unregister(struct class *class);
228 /* This is a #define to keep the compiler from merging different
229 * instances of the __key variable */
230 #define class_register(class) \
232 static struct lock_class_key __key; \
233 __class_register(class, &__key); \
237 struct class_compat
*class_compat_register(const char *name
);
238 void class_compat_unregister(struct class_compat
*cls
);
239 int class_compat_create_link(struct class_compat
*cls
, struct device
*dev
,
240 struct device
*device_link
);
241 void class_compat_remove_link(struct class_compat
*cls
, struct device
*dev
,
242 struct device
*device_link
);
244 extern void class_dev_iter_init(struct class_dev_iter
*iter
,
246 struct device
*start
,
247 const struct device_type
*type
);
248 extern struct device
*class_dev_iter_next(struct class_dev_iter
*iter
);
249 extern void class_dev_iter_exit(struct class_dev_iter
*iter
);
251 extern int class_for_each_device(struct class *class, struct device
*start
,
253 int (*fn
)(struct device
*dev
, void *data
));
254 extern struct device
*class_find_device(struct class *class,
255 struct device
*start
, void *data
,
256 int (*match
)(struct device
*, void *));
258 struct class_attribute
{
259 struct attribute attr
;
260 ssize_t (*show
)(struct class *class, struct class_attribute
*attr
,
262 ssize_t (*store
)(struct class *class, struct class_attribute
*attr
,
263 const char *buf
, size_t count
);
266 #define CLASS_ATTR(_name, _mode, _show, _store) \
267 struct class_attribute class_attr_##_name = __ATTR(_name, _mode, _show, _store)
269 extern int __must_check
class_create_file(struct class *class,
270 const struct class_attribute
*attr
);
271 extern void class_remove_file(struct class *class,
272 const struct class_attribute
*attr
);
274 /* Simple class attribute that is just a static string */
276 struct class_attribute_string
{
277 struct class_attribute attr
;
281 /* Currently read-only only */
282 #define _CLASS_ATTR_STRING(_name, _mode, _str) \
283 { __ATTR(_name, _mode, show_class_attr_string, NULL), _str }
284 #define CLASS_ATTR_STRING(_name, _mode, _str) \
285 struct class_attribute_string class_attr_##_name = \
286 _CLASS_ATTR_STRING(_name, _mode, _str)
288 extern ssize_t
show_class_attr_string(struct class *class, struct class_attribute
*attr
,
291 struct class_interface
{
292 struct list_head node
;
295 int (*add_dev
) (struct device
*, struct class_interface
*);
296 void (*remove_dev
) (struct device
*, struct class_interface
*);
299 extern int __must_check
class_interface_register(struct class_interface
*);
300 extern void class_interface_unregister(struct class_interface
*);
302 extern struct class * __must_check
__class_create(struct module
*owner
,
304 struct lock_class_key
*key
);
305 extern void class_destroy(struct class *cls
);
307 /* This is a #define to keep the compiler from merging different
308 * instances of the __key variable */
309 #define class_create(owner, name) \
311 static struct lock_class_key __key; \
312 __class_create(owner, name, &__key); \
316 * The type of device, "struct device" is embedded in. A class
317 * or bus can contain devices of different types
318 * like "partitions" and "disks", "mouse" and "event".
319 * This identifies the device type and carries type-specific
320 * information, equivalent to the kobj_type of a kobject.
321 * If "name" is specified, the uevent will contain it in
322 * the DEVTYPE variable.
326 const struct attribute_group
**groups
;
327 int (*uevent
)(struct device
*dev
, struct kobj_uevent_env
*env
);
328 char *(*devnode
)(struct device
*dev
, mode_t
*mode
);
329 void (*release
)(struct device
*dev
);
331 const struct dev_pm_ops
*pm
;
334 /* interface for exporting device attributes */
335 struct device_attribute
{
336 struct attribute attr
;
337 ssize_t (*show
)(struct device
*dev
, struct device_attribute
*attr
,
339 ssize_t (*store
)(struct device
*dev
, struct device_attribute
*attr
,
340 const char *buf
, size_t count
);
343 #define DEVICE_ATTR(_name, _mode, _show, _store) \
344 struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store)
346 extern int __must_check
device_create_file(struct device
*device
,
347 const struct device_attribute
*entry
);
348 extern void device_remove_file(struct device
*dev
,
349 const struct device_attribute
*attr
);
350 extern int __must_check
device_create_bin_file(struct device
*dev
,
351 const struct bin_attribute
*attr
);
352 extern void device_remove_bin_file(struct device
*dev
,
353 const struct bin_attribute
*attr
);
354 extern int device_schedule_callback_owner(struct device
*dev
,
355 void (*func
)(struct device
*dev
), struct module
*owner
);
357 /* This is a macro to avoid include problems with THIS_MODULE */
358 #define device_schedule_callback(dev, func) \
359 device_schedule_callback_owner(dev, func, THIS_MODULE)
361 /* device resource management */
362 typedef void (*dr_release_t
)(struct device
*dev
, void *res
);
363 typedef int (*dr_match_t
)(struct device
*dev
, void *res
, void *match_data
);
365 #ifdef CONFIG_DEBUG_DEVRES
366 extern void *__devres_alloc(dr_release_t release
, size_t size
, gfp_t gfp
,
368 #define devres_alloc(release, size, gfp) \
369 __devres_alloc(release, size, gfp, #release)
371 extern void *devres_alloc(dr_release_t release
, size_t size
, gfp_t gfp
);
373 extern void devres_free(void *res
);
374 extern void devres_add(struct device
*dev
, void *res
);
375 extern void *devres_find(struct device
*dev
, dr_release_t release
,
376 dr_match_t match
, void *match_data
);
377 extern void *devres_get(struct device
*dev
, void *new_res
,
378 dr_match_t match
, void *match_data
);
379 extern void *devres_remove(struct device
*dev
, dr_release_t release
,
380 dr_match_t match
, void *match_data
);
381 extern int devres_destroy(struct device
*dev
, dr_release_t release
,
382 dr_match_t match
, void *match_data
);
385 extern void * __must_check
devres_open_group(struct device
*dev
, void *id
,
387 extern void devres_close_group(struct device
*dev
, void *id
);
388 extern void devres_remove_group(struct device
*dev
, void *id
);
389 extern int devres_release_group(struct device
*dev
, void *id
);
391 /* managed kzalloc/kfree for device drivers, no kmalloc, always use kzalloc */
392 extern void *devm_kzalloc(struct device
*dev
, size_t size
, gfp_t gfp
);
393 extern void devm_kfree(struct device
*dev
, void *p
);
395 struct device_dma_parameters
{
397 * a low level driver may set these to teach IOMMU code about
400 unsigned int max_segment_size
;
401 unsigned long segment_boundary_mask
;
405 struct device
*parent
;
407 struct device_private
*p
;
410 const char *init_name
; /* initial name of the device */
411 struct device_type
*type
;
413 struct mutex mutex
; /* mutex to synchronize calls to
417 struct bus_type
*bus
; /* type of bus device is on */
418 struct device_driver
*driver
; /* which driver has allocated this
420 void *platform_data
; /* Platform specific data, device
421 core doesn't touch it */
422 struct dev_pm_info power
;
425 int numa_node
; /* NUMA node this device is close to */
427 u64
*dma_mask
; /* dma mask (if dma'able device) */
428 u64 coherent_dma_mask
;/* Like dma_mask, but for
429 alloc_coherent mappings as
430 not all hardware supports
431 64 bit addresses for consistent
432 allocations such descriptors. */
434 struct device_dma_parameters
*dma_parms
;
436 struct list_head dma_pools
; /* dma pools (if dma'ble) */
438 struct dma_coherent_mem
*dma_mem
; /* internal for coherent mem
440 /* arch specific additions */
441 struct dev_archdata archdata
;
443 struct device_node
*of_node
; /* associated device tree node */
445 dev_t devt
; /* dev_t, creates the sysfs "dev" */
447 spinlock_t devres_lock
;
448 struct list_head devres_head
;
450 struct klist_node knode_class
;
452 const struct attribute_group
**groups
; /* optional groups */
454 void (*release
)(struct device
*dev
);
457 /* Get the wakeup routines, which depend on struct device */
458 #include <linux/pm_wakeup.h>
460 static inline const char *dev_name(const struct device
*dev
)
462 /* Use the init name until the kobject becomes available */
464 return dev
->init_name
;
466 return kobject_name(&dev
->kobj
);
469 extern int dev_set_name(struct device
*dev
, const char *name
, ...)
470 __attribute__((format(printf
, 2, 3)));
473 static inline int dev_to_node(struct device
*dev
)
475 return dev
->numa_node
;
477 static inline void set_dev_node(struct device
*dev
, int node
)
479 dev
->numa_node
= node
;
482 static inline int dev_to_node(struct device
*dev
)
486 static inline void set_dev_node(struct device
*dev
, int node
)
491 static inline unsigned int dev_get_uevent_suppress(const struct device
*dev
)
493 return dev
->kobj
.uevent_suppress
;
496 static inline void dev_set_uevent_suppress(struct device
*dev
, int val
)
498 dev
->kobj
.uevent_suppress
= val
;
501 static inline int device_is_registered(struct device
*dev
)
503 return dev
->kobj
.state_in_sysfs
;
506 static inline void device_enable_async_suspend(struct device
*dev
)
508 if (!dev
->power
.in_suspend
)
509 dev
->power
.async_suspend
= true;
512 static inline void device_disable_async_suspend(struct device
*dev
)
514 if (!dev
->power
.in_suspend
)
515 dev
->power
.async_suspend
= false;
518 static inline bool device_async_suspend_enabled(struct device
*dev
)
520 return !!dev
->power
.async_suspend
;
523 static inline void device_lock(struct device
*dev
)
525 mutex_lock(&dev
->mutex
);
528 static inline int device_trylock(struct device
*dev
)
530 return mutex_trylock(&dev
->mutex
);
533 static inline void device_unlock(struct device
*dev
)
535 mutex_unlock(&dev
->mutex
);
538 void driver_init(void);
541 * High level routines for use by the bus drivers
543 extern int __must_check
device_register(struct device
*dev
);
544 extern void device_unregister(struct device
*dev
);
545 extern void device_initialize(struct device
*dev
);
546 extern int __must_check
device_add(struct device
*dev
);
547 extern void device_del(struct device
*dev
);
548 extern int device_for_each_child(struct device
*dev
, void *data
,
549 int (*fn
)(struct device
*dev
, void *data
));
550 extern struct device
*device_find_child(struct device
*dev
, void *data
,
551 int (*match
)(struct device
*dev
, void *data
));
552 extern int device_rename(struct device
*dev
, const char *new_name
);
553 extern int device_move(struct device
*dev
, struct device
*new_parent
,
554 enum dpm_order dpm_order
);
555 extern const char *device_get_devnode(struct device
*dev
,
556 mode_t
*mode
, const char **tmp
);
557 extern void *dev_get_drvdata(const struct device
*dev
);
558 extern void dev_set_drvdata(struct device
*dev
, void *data
);
561 * Root device objects for grouping under /sys/devices
563 extern struct device
*__root_device_register(const char *name
,
564 struct module
*owner
);
565 static inline struct device
*root_device_register(const char *name
)
567 return __root_device_register(name
, THIS_MODULE
);
569 extern void root_device_unregister(struct device
*root
);
571 static inline void *dev_get_platdata(const struct device
*dev
)
573 return dev
->platform_data
;
577 * Manual binding of a device to driver. See drivers/base/bus.c
578 * for information on use.
580 extern int __must_check
device_bind_driver(struct device
*dev
);
581 extern void device_release_driver(struct device
*dev
);
582 extern int __must_check
device_attach(struct device
*dev
);
583 extern int __must_check
driver_attach(struct device_driver
*drv
);
584 extern int __must_check
device_reprobe(struct device
*dev
);
587 * Easy functions for dynamically creating devices on the fly
589 extern struct device
*device_create_vargs(struct class *cls
,
590 struct device
*parent
,
595 extern struct device
*device_create(struct class *cls
, struct device
*parent
,
596 dev_t devt
, void *drvdata
,
597 const char *fmt
, ...)
598 __attribute__((format(printf
, 5, 6)));
599 extern void device_destroy(struct class *cls
, dev_t devt
);
602 * Platform "fixup" functions - allow the platform to have their say
603 * about devices and actions that the general device layer doesn't
606 /* Notify platform of device discovery */
607 extern int (*platform_notify
)(struct device
*dev
);
609 extern int (*platform_notify_remove
)(struct device
*dev
);
613 * get_device - atomically increment the reference count for the device.
616 extern struct device
*get_device(struct device
*dev
);
617 extern void put_device(struct device
*dev
);
619 extern void wait_for_device_probe(void);
621 #ifdef CONFIG_DEVTMPFS
622 extern int devtmpfs_create_node(struct device
*dev
);
623 extern int devtmpfs_delete_node(struct device
*dev
);
624 extern int devtmpfs_mount(const char *mntdir
);
626 static inline int devtmpfs_create_node(struct device
*dev
) { return 0; }
627 static inline int devtmpfs_delete_node(struct device
*dev
) { return 0; }
628 static inline int devtmpfs_mount(const char *mountpoint
) { return 0; }
631 /* drivers/base/power/shutdown.c */
632 extern void device_shutdown(void);
634 /* drivers/base/sys.c */
635 extern void sysdev_shutdown(void);
637 /* debugging and troubleshooting/diagnostic helpers. */
638 extern const char *dev_driver_string(const struct device
*dev
);
643 extern int dev_printk(const char *level
, const struct device
*dev
,
644 const char *fmt
, ...)
645 __attribute__ ((format (printf
, 3, 4)));
646 extern int dev_emerg(const struct device
*dev
, const char *fmt
, ...)
647 __attribute__ ((format (printf
, 2, 3)));
648 extern int dev_alert(const struct device
*dev
, const char *fmt
, ...)
649 __attribute__ ((format (printf
, 2, 3)));
650 extern int dev_crit(const struct device
*dev
, const char *fmt
, ...)
651 __attribute__ ((format (printf
, 2, 3)));
652 extern int dev_err(const struct device
*dev
, const char *fmt
, ...)
653 __attribute__ ((format (printf
, 2, 3)));
654 extern int dev_warn(const struct device
*dev
, const char *fmt
, ...)
655 __attribute__ ((format (printf
, 2, 3)));
656 extern int dev_notice(const struct device
*dev
, const char *fmt
, ...)
657 __attribute__ ((format (printf
, 2, 3)));
658 extern int _dev_info(const struct device
*dev
, const char *fmt
, ...)
659 __attribute__ ((format (printf
, 2, 3)));
663 static inline int dev_printk(const char *level
, const struct device
*dev
,
664 const char *fmt
, ...)
665 __attribute__ ((format (printf
, 3, 4)));
666 static inline int dev_printk(const char *level
, const struct device
*dev
,
667 const char *fmt
, ...)
670 static inline int dev_emerg(const struct device
*dev
, const char *fmt
, ...)
671 __attribute__ ((format (printf
, 2, 3)));
672 static inline int dev_emerg(const struct device
*dev
, const char *fmt
, ...)
674 static inline int dev_crit(const struct device
*dev
, const char *fmt
, ...)
675 __attribute__ ((format (printf
, 2, 3)));
676 static inline int dev_crit(const struct device
*dev
, const char *fmt
, ...)
678 static inline int dev_alert(const struct device
*dev
, const char *fmt
, ...)
679 __attribute__ ((format (printf
, 2, 3)));
680 static inline int dev_alert(const struct device
*dev
, const char *fmt
, ...)
682 static inline int dev_err(const struct device
*dev
, const char *fmt
, ...)
683 __attribute__ ((format (printf
, 2, 3)));
684 static inline int dev_err(const struct device
*dev
, const char *fmt
, ...)
686 static inline int dev_warn(const struct device
*dev
, const char *fmt
, ...)
687 __attribute__ ((format (printf
, 2, 3)));
688 static inline int dev_warn(const struct device
*dev
, const char *fmt
, ...)
690 static inline int dev_notice(const struct device
*dev
, const char *fmt
, ...)
691 __attribute__ ((format (printf
, 2, 3)));
692 static inline int dev_notice(const struct device
*dev
, const char *fmt
, ...)
694 static inline int _dev_info(const struct device
*dev
, const char *fmt
, ...)
695 __attribute__ ((format (printf
, 2, 3)));
696 static inline int _dev_info(const struct device
*dev
, const char *fmt
, ...)
702 * Stupid hackaround for existing uses of non-printk uses dev_info
704 * Note that the definition of dev_info below is actually _dev_info
705 * and a macro is used to avoid redefining dev_info
708 #define dev_info(dev, fmt, arg...) _dev_info(dev, fmt, ##arg)
711 #define dev_dbg(dev, format, arg...) \
712 dev_printk(KERN_DEBUG, dev, format, ##arg)
713 #elif defined(CONFIG_DYNAMIC_DEBUG)
714 #define dev_dbg(dev, format, ...) \
716 dynamic_dev_dbg(dev, format, ##__VA_ARGS__); \
719 #define dev_dbg(dev, format, arg...) \
722 dev_printk(KERN_DEBUG, dev, format, ##arg); \
728 #define dev_vdbg dev_dbg
730 #define dev_vdbg(dev, format, arg...) \
733 dev_printk(KERN_DEBUG, dev, format, ##arg); \
739 * dev_WARN() acts like dev_printk(), but with the key difference
740 * of using a WARN/WARN_ON to get the message out, including the
741 * file/line information and a backtrace.
743 #define dev_WARN(dev, format, arg...) \
744 WARN(1, "Device: %s\n" format, dev_driver_string(dev), ## arg);
746 /* Create alias, so I can be autoloaded. */
747 #define MODULE_ALIAS_CHARDEV(major,minor) \
748 MODULE_ALIAS("char-major-" __stringify(major) "-" __stringify(minor))
749 #define MODULE_ALIAS_CHARDEV_MAJOR(major) \
750 MODULE_ALIAS("char-major-" __stringify(major) "-*")
752 #ifdef CONFIG_SYSFS_DEPRECATED
753 extern long sysfs_deprecated
;
755 #define sysfs_deprecated 0
758 #endif /* _DEVICE_H_ */
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