xref: /freebsd/sys/compat/linuxkpi/common/include/linux/device.h (revision 525fe93dc7487a1e63a90f6a2b956abc601963c1)
1 /*-
2  * Copyright (c) 2010 Isilon Systems, Inc.
3  * Copyright (c) 2010 iX Systems, Inc.
4  * Copyright (c) 2010 Panasas, Inc.
5  * Copyright (c) 2013-2016 Mellanox Technologies, Ltd.
6  * All rights reserved.
7  * Copyright (c) 2021-2022 The FreeBSD Foundation
8  *
9  * Portions of this software were developed by Björn Zeeb
10  * under sponsorship from the FreeBSD Foundation.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice unmodified, this list of conditions, and the following
17  *    disclaimer.
18  * 2. Redistributions in binary form must reproduce the above copyright
19  *    notice, this list of conditions and the following disclaimer in the
20  *    documentation and/or other materials provided with the distribution.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32  */
33 #ifndef	_LINUXKPI_LINUX_DEVICE_H_
34 #define	_LINUXKPI_LINUX_DEVICE_H_
35 
36 #include <linux/err.h>
37 #include <linux/types.h>
38 #include <linux/kobject.h>
39 #include <linux/sysfs.h>
40 #include <linux/list.h>
41 #include <linux/compiler.h>
42 #include <linux/module.h>
43 #include <linux/workqueue.h>
44 #include <linux/kdev_t.h>
45 #include <linux/backlight.h>
46 #include <linux/pm.h>
47 #include <linux/idr.h>
48 #include <linux/ratelimit.h>	/* via linux/dev_printk.h */
49 #include <linux/fwnode.h>
50 #include <asm/atomic.h>
51 
52 #include <sys/bus.h>
53 #include <sys/backlight.h>
54 
55 struct device;
56 
57 struct class {
58 	const char	*name;
59 	struct module	*owner;
60 	struct kobject	kobj;
61 	devclass_t	bsdclass;
62 	const struct dev_pm_ops *pm;
63 	const struct attribute_group **dev_groups;
64 	void		(*class_release)(struct class *class);
65 	void		(*dev_release)(struct device *dev);
66 	char *		(*devnode)(struct device *dev, umode_t *mode);
67 };
68 
69 struct dev_pm_ops {
70 	int (*prepare)(struct device *dev);
71 	void (*complete)(struct device *dev);
72 	int (*suspend)(struct device *dev);
73 	int (*suspend_late)(struct device *dev);
74 	int (*resume)(struct device *dev);
75 	int (*resume_early)(struct device *dev);
76 	int (*freeze)(struct device *dev);
77 	int (*freeze_late)(struct device *dev);
78 	int (*thaw)(struct device *dev);
79 	int (*thaw_early)(struct device *dev);
80 	int (*poweroff)(struct device *dev);
81 	int (*poweroff_late)(struct device *dev);
82 	int (*restore)(struct device *dev);
83 	int (*restore_early)(struct device *dev);
84 	int (*runtime_suspend)(struct device *dev);
85 	int (*runtime_resume)(struct device *dev);
86 	int (*runtime_idle)(struct device *dev);
87 };
88 
89 struct device_driver {
90 	const char	*name;
91 	const struct dev_pm_ops *pm;
92 };
93 
94 struct device_type {
95 	const char	*name;
96 };
97 
98 struct device {
99 	struct device	*parent;
100 	struct list_head irqents;
101 	device_t	bsddev;
102 	/*
103 	 * The following flag is used to determine if the LinuxKPI is
104 	 * responsible for detaching the BSD device or not. If the
105 	 * LinuxKPI got the BSD device using devclass_get_device(), it
106 	 * must not try to detach or delete it, because it's already
107 	 * done somewhere else.
108 	 */
109 	bool		bsddev_attached_here;
110 	struct device_driver *driver;
111 	struct device_type *type;
112 	dev_t		devt;
113 	struct class	*class;
114 	void		(*release)(struct device *dev);
115 	struct kobject	kobj;
116 	void		*dma_priv;
117 	void		*driver_data;
118 	unsigned int	irq;
119 #define	LINUX_IRQ_INVALID	65535
120 	unsigned int	irq_start;
121 	unsigned int	irq_end;
122 	const struct attribute_group **groups;
123 	struct fwnode_handle *fwnode;
124 	struct cdev	*backlight_dev;
125 	struct backlight_device	*bd;
126 
127 	spinlock_t	devres_lock;
128 	struct list_head devres_head;
129 
130 	struct dev_pm_info	power;
131 };
132 
133 extern struct device linux_root_device;
134 extern struct kobject linux_class_root;
135 extern const struct kobj_type linux_dev_ktype;
136 extern const struct kobj_type linux_class_ktype;
137 
138 struct class_attribute {
139 	struct attribute attr;
140 	ssize_t (*show)(struct class *, struct class_attribute *, char *);
141 	ssize_t (*store)(struct class *, struct class_attribute *, const char *, size_t);
142 	const void *(*namespace)(struct class *, const struct class_attribute *);
143 };
144 
145 #define	CLASS_ATTR(_name, _mode, _show, _store)				\
146 	struct class_attribute class_attr_##_name =			\
147 	    { { #_name, NULL, _mode }, _show, _store }
148 
149 struct device_attribute {
150 	struct attribute	attr;
151 	ssize_t			(*show)(struct device *,
152 					struct device_attribute *, char *);
153 	ssize_t			(*store)(struct device *,
154 					struct device_attribute *, const char *,
155 					size_t);
156 };
157 
158 #define	DEVICE_ATTR(_name, _mode, _show, _store)			\
159 	struct device_attribute dev_attr_##_name =			\
160 	    __ATTR(_name, _mode, _show, _store)
161 #define	DEVICE_ATTR_RO(_name)						\
162 	struct device_attribute dev_attr_##_name = __ATTR_RO(_name)
163 #define	DEVICE_ATTR_WO(_name)						\
164 	struct device_attribute dev_attr_##_name = __ATTR_WO(_name)
165 #define	DEVICE_ATTR_RW(_name)						\
166 	struct device_attribute dev_attr_##_name = __ATTR_RW(_name)
167 
168 /* Simple class attribute that is just a static string */
169 struct class_attribute_string {
170 	struct class_attribute attr;
171 	char *str;
172 };
173 
174 static inline ssize_t
175 show_class_attr_string(struct class *class,
176 				struct class_attribute *attr, char *buf)
177 {
178 	struct class_attribute_string *cs;
179 	cs = container_of(attr, struct class_attribute_string, attr);
180 	return snprintf(buf, PAGE_SIZE, "%s\n", cs->str);
181 }
182 
183 /* Currently read-only only */
184 #define _CLASS_ATTR_STRING(_name, _mode, _str) \
185 	{ __ATTR(_name, _mode, show_class_attr_string, NULL), _str }
186 #define CLASS_ATTR_STRING(_name, _mode, _str) \
187 	struct class_attribute_string class_attr_##_name = \
188 		_CLASS_ATTR_STRING(_name, _mode, _str)
189 
190 #define	dev_err(dev, fmt, ...)	device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
191 #define	dev_crit(dev, fmt, ...)	device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
192 #define	dev_warn(dev, fmt, ...)	device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
193 #define	dev_info(dev, fmt, ...)	device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
194 #define	dev_notice(dev, fmt, ...)	device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
195 #define	dev_emerg(dev, fmt, ...)	device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
196 #define	dev_dbg(dev, fmt, ...)	do { } while (0)
197 #define	dev_printk(lvl, dev, fmt, ...)					\
198 	    device_printf((dev)->bsddev, fmt, ##__VA_ARGS__)
199 
200 #define	dev_WARN(dev, fmt, ...)	\
201     device_printf((dev)->bsddev, "%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__)
202 
203 #define	dev_WARN_ONCE(dev, condition, fmt, ...) do {		\
204 	static bool __dev_WARN_ONCE;				\
205 	bool __ret_warn_on = (condition);			\
206 	if (unlikely(__ret_warn_on)) {				\
207 		if (!__dev_WARN_ONCE) {				\
208 			__dev_WARN_ONCE = true;			\
209 			device_printf((dev)->bsddev, "%s:%d: " fmt, __func__, __LINE__, ##__VA_ARGS__); \
210 		}						\
211 	}							\
212 } while (0)
213 
214 #define dev_info_once(dev, ...) do {		\
215 	static bool __dev_info_once;		\
216 	if (!__dev_info_once) {			\
217 	__dev_info_once = true;			\
218 	dev_info(dev, __VA_ARGS__);		\
219 	}					\
220 } while (0)
221 
222 #define	dev_warn_once(dev, ...) do {		\
223 	static bool __dev_warn_once;		\
224 	if (!__dev_warn_once) {			\
225 		__dev_warn_once = 1;		\
226 		dev_warn(dev, __VA_ARGS__);	\
227 	}					\
228 } while (0)
229 
230 #define	dev_err_once(dev, ...) do {		\
231 	static bool __dev_err_once;		\
232 	if (!__dev_err_once) {			\
233 		__dev_err_once = 1;		\
234 		dev_err(dev, __VA_ARGS__);	\
235 	}					\
236 } while (0)
237 
238 #define	dev_err_ratelimited(dev, ...) do {	\
239 	static linux_ratelimit_t __ratelimited;	\
240 	if (linux_ratelimited(&__ratelimited))	\
241 		dev_err(dev, __VA_ARGS__);	\
242 } while (0)
243 
244 #define	dev_warn_ratelimited(dev, ...) do {	\
245 	static linux_ratelimit_t __ratelimited;	\
246 	if (linux_ratelimited(&__ratelimited))	\
247 		dev_warn(dev, __VA_ARGS__);	\
248 } while (0)
249 
250 #define	dev_dbg_ratelimited(dev, ...) do {	\
251 	static linux_ratelimit_t __ratelimited;	\
252 	if (linux_ratelimited(&__ratelimited))	\
253 		dev_dbg(dev, __VA_ARGS__);	\
254 } while (0)
255 
256 /* Public and LinuxKPI internal devres functions. */
257 void *lkpi_devres_alloc(void(*release)(struct device *, void *), size_t, gfp_t);
258 void lkpi_devres_add(struct device *, void *);
259 void lkpi_devres_free(void *);
260 void *lkpi_devres_find(struct device *, void(*release)(struct device *, void *),
261     int (*match)(struct device *, void *, void *), void *);
262 int lkpi_devres_destroy(struct device *, void(*release)(struct device *, void *),
263     int (*match)(struct device *, void *, void *), void *);
264 #define	devres_alloc(_r, _s, _g)	lkpi_devres_alloc(_r, _s, _g)
265 #define	devres_add(_d, _p)		lkpi_devres_add(_d, _p)
266 #define	devres_free(_p)			lkpi_devres_free(_p)
267 #define	devres_find(_d, _rfn, _mfn, _mp) \
268 					lkpi_devres_find(_d, _rfn, _mfn, _mp)
269 #define	devres_destroy(_d, _rfn, _mfn, _mp) \
270 					lkpi_devres_destroy(_d, _rfn, _mfn, _mp)
271 void lkpi_devres_release_free_list(struct device *);
272 void lkpi_devres_unlink(struct device *, void *);
273 void lkpi_devm_kmalloc_release(struct device *, void *);
274 
275 static inline const char *
276 dev_driver_string(const struct device *dev)
277 {
278 	driver_t *drv;
279 	const char *str = "";
280 
281 	if (dev->bsddev != NULL) {
282 		drv = device_get_driver(dev->bsddev);
283 		if (drv != NULL)
284 			str = drv->name;
285 	}
286 
287 	return (str);
288 }
289 
290 static inline void *
291 dev_get_drvdata(const struct device *dev)
292 {
293 
294 	return dev->driver_data;
295 }
296 
297 static inline void
298 dev_set_drvdata(struct device *dev, void *data)
299 {
300 
301 	dev->driver_data = data;
302 }
303 
304 static inline struct device *
305 get_device(struct device *dev)
306 {
307 
308 	if (dev)
309 		kobject_get(&dev->kobj);
310 
311 	return (dev);
312 }
313 
314 static inline char *
315 dev_name(const struct device *dev)
316 {
317 
318 	return kobject_name(&dev->kobj);
319 }
320 
321 #define	dev_set_name(_dev, _fmt, ...)					\
322 	kobject_set_name(&(_dev)->kobj, (_fmt), ##__VA_ARGS__)
323 
324 static inline void
325 put_device(struct device *dev)
326 {
327 
328 	if (dev)
329 		kobject_put(&dev->kobj);
330 }
331 
332 struct class *class_create(struct module *owner, const char *name);
333 
334 static inline int
335 class_register(struct class *class)
336 {
337 
338 	class->bsdclass = devclass_create(class->name);
339 	kobject_init(&class->kobj, &linux_class_ktype);
340 	kobject_set_name(&class->kobj, class->name);
341 	kobject_add(&class->kobj, &linux_class_root, class->name);
342 
343 	return (0);
344 }
345 
346 static inline void
347 class_unregister(struct class *class)
348 {
349 
350 	kobject_put(&class->kobj);
351 }
352 
353 static inline struct device *kobj_to_dev(struct kobject *kobj)
354 {
355 	return container_of(kobj, struct device, kobj);
356 }
357 
358 struct device *device_create(struct class *class, struct device *parent,
359 	    dev_t devt, void *drvdata, const char *fmt, ...);
360 struct device *device_create_groups_vargs(struct class *class, struct device *parent,
361     dev_t devt, void *drvdata, const struct attribute_group **groups,
362     const char *fmt, va_list args);
363 
364 /*
365  * Devices are registered and created for exporting to sysfs. Create
366  * implies register and register assumes the device fields have been
367  * setup appropriately before being called.
368  */
369 static inline void
370 device_initialize(struct device *dev)
371 {
372 	device_t bsddev = NULL;
373 	int unit = -1;
374 
375 	if (dev->devt) {
376 		unit = MINOR(dev->devt);
377 		bsddev = devclass_get_device(dev->class->bsdclass, unit);
378 		dev->bsddev_attached_here = false;
379 	} else if (dev->parent == NULL) {
380 		bsddev = devclass_get_device(dev->class->bsdclass, 0);
381 		dev->bsddev_attached_here = false;
382 	} else {
383 		dev->bsddev_attached_here = true;
384 	}
385 
386 	if (bsddev == NULL && dev->parent != NULL) {
387 		bsddev = device_add_child(dev->parent->bsddev,
388 		    dev->class->kobj.name, unit);
389 	}
390 
391 	if (bsddev != NULL)
392 		device_set_softc(bsddev, dev);
393 
394 	dev->bsddev = bsddev;
395 	MPASS(dev->bsddev != NULL);
396 	kobject_init(&dev->kobj, &linux_dev_ktype);
397 
398 	spin_lock_init(&dev->devres_lock);
399 	INIT_LIST_HEAD(&dev->devres_head);
400 }
401 
402 static inline int
403 device_add(struct device *dev)
404 {
405 	if (dev->bsddev != NULL) {
406 		if (dev->devt == 0)
407 			dev->devt = makedev(0, device_get_unit(dev->bsddev));
408 	}
409 	kobject_add(&dev->kobj, &dev->class->kobj, dev_name(dev));
410 
411 	if (dev->groups)
412 		return (sysfs_create_groups(&dev->kobj, dev->groups));
413 
414 	return (0);
415 }
416 
417 static inline void
418 device_create_release(struct device *dev)
419 {
420 	kfree(dev);
421 }
422 
423 static inline struct device *
424 device_create_with_groups(struct class *class,
425     struct device *parent, dev_t devt, void *drvdata,
426     const struct attribute_group **groups, const char *fmt, ...)
427 {
428 	va_list vargs;
429 	struct device *dev;
430 
431 	va_start(vargs, fmt);
432 	dev = device_create_groups_vargs(class, parent, devt, drvdata,
433 	    groups, fmt, vargs);
434 	va_end(vargs);
435 	return dev;
436 }
437 
438 static inline bool
439 device_is_registered(struct device *dev)
440 {
441 
442 	return (dev->bsddev != NULL);
443 }
444 
445 static inline int
446 device_register(struct device *dev)
447 {
448 	device_t bsddev = NULL;
449 	int unit = -1;
450 
451 	if (device_is_registered(dev))
452 		goto done;
453 
454 	if (dev->devt) {
455 		unit = MINOR(dev->devt);
456 		bsddev = devclass_get_device(dev->class->bsdclass, unit);
457 		dev->bsddev_attached_here = false;
458 	} else if (dev->parent == NULL) {
459 		bsddev = devclass_get_device(dev->class->bsdclass, 0);
460 		dev->bsddev_attached_here = false;
461 	} else {
462 		dev->bsddev_attached_here = true;
463 	}
464 	if (bsddev == NULL && dev->parent != NULL) {
465 		bsddev = device_add_child(dev->parent->bsddev,
466 		    dev->class->kobj.name, unit);
467 	}
468 	if (bsddev != NULL) {
469 		if (dev->devt == 0)
470 			dev->devt = makedev(0, device_get_unit(bsddev));
471 		device_set_softc(bsddev, dev);
472 	}
473 	dev->bsddev = bsddev;
474 done:
475 	kobject_init(&dev->kobj, &linux_dev_ktype);
476 	kobject_add(&dev->kobj, &dev->class->kobj, dev_name(dev));
477 
478 	sysfs_create_groups(&dev->kobj, dev->class->dev_groups);
479 
480 	return (0);
481 }
482 
483 static inline void
484 device_unregister(struct device *dev)
485 {
486 	device_t bsddev;
487 
488 	sysfs_remove_groups(&dev->kobj, dev->class->dev_groups);
489 
490 	bsddev = dev->bsddev;
491 	dev->bsddev = NULL;
492 
493 	if (bsddev != NULL && dev->bsddev_attached_here) {
494 		bus_topo_lock();
495 		device_delete_child(device_get_parent(bsddev), bsddev);
496 		bus_topo_unlock();
497 	}
498 	put_device(dev);
499 }
500 
501 static inline void
502 device_del(struct device *dev)
503 {
504 	device_t bsddev;
505 
506 	bsddev = dev->bsddev;
507 	dev->bsddev = NULL;
508 
509 	if (bsddev != NULL && dev->bsddev_attached_here) {
510 		bus_topo_lock();
511 		device_delete_child(device_get_parent(bsddev), bsddev);
512 		bus_topo_unlock();
513 	}
514 }
515 
516 static inline void
517 device_destroy(struct class *class, dev_t devt)
518 {
519 	device_t bsddev;
520 	int unit;
521 
522 	unit = MINOR(devt);
523 	bsddev = devclass_get_device(class->bsdclass, unit);
524 	if (bsddev != NULL)
525 		device_unregister(device_get_softc(bsddev));
526 }
527 
528 static inline void
529 device_release_driver(struct device *dev)
530 {
531 
532 #if 0
533 	/* This leads to panics. Disable temporarily. Keep to rework. */
534 
535 	/* We also need to cleanup LinuxKPI bits. What else? */
536 	lkpi_devres_release_free_list(dev);
537 	dev_set_drvdata(dev, NULL);
538 	/* Do not call dev->release! */
539 
540 	bus_topo_lock();
541 	if (device_is_attached(dev->bsddev))
542 		device_detach(dev->bsddev);
543 	bus_topo_unlock();
544 #endif
545 }
546 
547 static inline int
548 device_reprobe(struct device *dev)
549 {
550 	int error;
551 
552 	device_release_driver(dev);
553 	bus_topo_lock();
554 	error = device_probe_and_attach(dev->bsddev);
555 	bus_topo_unlock();
556 
557 	return (-error);
558 }
559 
560 static inline void
561 device_set_wakeup_enable(struct device *dev __unused, bool enable __unused)
562 {
563 
564 	/*
565 	 * XXX-BZ TODO This is used by wireless drivers supporting WoWLAN which
566 	 * we currently do not support.
567 	 */
568 }
569 
570 static inline int
571 device_wakeup_enable(struct device *dev)
572 {
573 
574 	device_set_wakeup_enable(dev, true);
575 	return (0);
576 }
577 
578 static inline bool
579 device_iommu_mapped(struct device *dev __unused)
580 {
581 	return (false);
582 }
583 
584 #define	dev_pm_set_driver_flags(dev, flags) do { \
585 } while (0)
586 
587 static inline void
588 linux_class_kfree(struct class *class)
589 {
590 
591 	kfree(class);
592 }
593 
594 static inline void
595 class_destroy(struct class *class)
596 {
597 
598 	if (class == NULL)
599 		return;
600 	class_unregister(class);
601 }
602 
603 static inline int
604 device_create_file(struct device *dev, const struct device_attribute *attr)
605 {
606 
607 	if (dev)
608 		return sysfs_create_file(&dev->kobj, &attr->attr);
609 	return -EINVAL;
610 }
611 
612 static inline void
613 device_remove_file(struct device *dev, const struct device_attribute *attr)
614 {
615 
616 	if (dev)
617 		sysfs_remove_file(&dev->kobj, &attr->attr);
618 }
619 
620 static inline int
621 class_create_file(struct class *class, const struct class_attribute *attr)
622 {
623 
624 	if (class)
625 		return sysfs_create_file(&class->kobj, &attr->attr);
626 	return -EINVAL;
627 }
628 
629 static inline void
630 class_remove_file(struct class *class, const struct class_attribute *attr)
631 {
632 
633 	if (class)
634 		sysfs_remove_file(&class->kobj, &attr->attr);
635 }
636 
637 #define	dev_to_node(dev) linux_dev_to_node(dev)
638 #define	of_node_to_nid(node) -1
639 int linux_dev_to_node(struct device *);
640 
641 char *kvasprintf(gfp_t, const char *, va_list);
642 char *kasprintf(gfp_t, const char *, ...);
643 char *lkpi_devm_kasprintf(struct device *, gfp_t, const char *, ...);
644 
645 #define	devm_kasprintf(_dev, _gfp, _fmt, ...)			\
646     lkpi_devm_kasprintf(_dev, _gfp, _fmt, ##__VA_ARGS__)
647 
648 static __inline void *
649 devm_kmalloc(struct device *dev, size_t size, gfp_t gfp)
650 {
651 	void *p;
652 
653 	p = lkpi_devres_alloc(lkpi_devm_kmalloc_release, size, gfp);
654 	if (p != NULL)
655 		lkpi_devres_add(dev, p);
656 
657 	return (p);
658 }
659 
660 static inline void *
661 devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp)
662 {
663 	void *dst;
664 
665 	if (len == 0)
666 		return (NULL);
667 
668 	dst = devm_kmalloc(dev, len, gfp);
669 	if (dst != NULL)
670 		memcpy(dst, src, len);
671 
672 	return (dst);
673 }
674 
675 #define	devm_kzalloc(_dev, _size, _gfp)				\
676     devm_kmalloc((_dev), (_size), (_gfp) | __GFP_ZERO)
677 
678 #define	devm_kcalloc(_dev, _sizen, _size, _gfp)			\
679     devm_kmalloc((_dev), ((_sizen) * (_size)), (_gfp) | __GFP_ZERO)
680 
681 int lkpi_devm_add_action(struct device *dev, void (*action)(void *), void *data);
682 #define	devm_add_action(dev, action, data)	\
683 	lkpi_devm_add_action(dev, action, data);
684 int lkpi_devm_add_action_or_reset(struct device *dev, void (*action)(void *), void *data);
685 #define	devm_add_action_or_reset(dev, action, data)	\
686 	lkpi_devm_add_action_or_reset(dev, action, data)
687 
688 #endif	/* _LINUXKPI_LINUX_DEVICE_H_ */
689