blob: f4f6176dcd1286313c57ae80239ec1f0f7bbf65e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * kobject.c - library routines for handling generic kernel objects
3 *
4 * Copyright (c) 2002-2003 Patrick Mochel <mochel@osdl.org>
5 *
6 * This file is released under the GPLv2.
7 *
8 *
9 * Please see the file Documentation/kobject.txt for critical information
10 * about using the kobject interface.
11 */
12
13#include <linux/kobject.h>
14#include <linux/string.h>
15#include <linux/module.h>
16#include <linux/stat.h>
Tim Schmielau4e57b682005-10-30 15:03:48 -080017#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018
19/**
20 * populate_dir - populate directory with attributes.
21 * @kobj: object we're working on.
22 *
23 * Most subsystems have a set of default attributes that
24 * are associated with an object that registers with them.
25 * This is a helper called during object registration that
26 * loops through the default attributes of the subsystem
27 * and creates attributes files for them in sysfs.
28 *
29 */
30
31static int populate_dir(struct kobject * kobj)
32{
33 struct kobj_type * t = get_ktype(kobj);
34 struct attribute * attr;
35 int error = 0;
36 int i;
37
38 if (t && t->default_attrs) {
39 for (i = 0; (attr = t->default_attrs[i]) != NULL; i++) {
40 if ((error = sysfs_create_file(kobj,attr)))
41 break;
42 }
43 }
44 return error;
45}
46
Eric W. Biedermanb592fcf2007-01-24 12:35:52 -070047static int create_dir(struct kobject * kobj, struct dentry *shadow_parent)
Linus Torvalds1da177e2005-04-16 15:20:36 -070048{
49 int error = 0;
50 if (kobject_name(kobj)) {
Eric W. Biedermanb592fcf2007-01-24 12:35:52 -070051 error = sysfs_create_dir(kobj, shadow_parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 if (!error) {
53 if ((error = populate_dir(kobj)))
54 sysfs_remove_dir(kobj);
55 }
56 }
57 return error;
58}
59
60static inline struct kobject * to_kobj(struct list_head * entry)
61{
62 return container_of(entry,struct kobject,entry);
63}
64
65static int get_kobj_path_length(struct kobject *kobj)
66{
67 int length = 1;
68 struct kobject * parent = kobj;
69
70 /* walk up the ancestors until we hit the one pointing to the
71 * root.
72 * Add 1 to strlen for leading '/' of each level.
73 */
74 do {
Chuck Ebbertb365b3d2006-01-12 20:02:00 -050075 if (kobject_name(parent) == NULL)
76 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070077 length += strlen(kobject_name(parent)) + 1;
78 parent = parent->parent;
79 } while (parent);
80 return length;
81}
82
83static void fill_kobj_path(struct kobject *kobj, char *path, int length)
84{
85 struct kobject * parent;
86
87 --length;
88 for (parent = kobj; parent; parent = parent->parent) {
89 int cur = strlen(kobject_name(parent));
90 /* back up enough to print this name with '/' */
91 length -= cur;
92 strncpy (path + length, kobject_name(parent), cur);
93 *(path + --length) = '/';
94 }
95
96 pr_debug("%s: path = '%s'\n",__FUNCTION__,path);
97}
98
99/**
Robert P. J. Day72fd4a32007-02-10 01:45:59 -0800100 * kobject_get_path - generate and return the path associated with a given kobj and kset pair.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 *
102 * @kobj: kobject in question, with which to build the path
103 * @gfp_mask: the allocation type used to allocate the path
Robert P. J. Day72fd4a32007-02-10 01:45:59 -0800104 *
105 * The result must be freed by the caller with kfree().
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 */
Al Virofd4f2df2005-10-21 03:18:50 -0400107char *kobject_get_path(struct kobject *kobj, gfp_t gfp_mask)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108{
109 char *path;
110 int len;
111
112 len = get_kobj_path_length(kobj);
Chuck Ebbertb365b3d2006-01-12 20:02:00 -0500113 if (len == 0)
114 return NULL;
Burman Yan4668edc2006-12-06 20:38:51 -0800115 path = kzalloc(len, gfp_mask);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 if (!path)
117 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 fill_kobj_path(kobj, path, len);
119
120 return path;
121}
Dmitry Torokhov80fc9f52006-10-11 01:43:58 -0400122EXPORT_SYMBOL_GPL(kobject_get_path);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123
124/**
125 * kobject_init - initialize object.
126 * @kobj: object in question.
127 */
128void kobject_init(struct kobject * kobj)
129{
Greg Kroah-Hartman31b90252007-01-18 12:23:51 -0800130 if (!kobj)
131 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 kref_init(&kobj->kref);
133 INIT_LIST_HEAD(&kobj->entry);
NeilBrown4508a7a2006-03-20 17:53:53 +1100134 init_waitqueue_head(&kobj->poll);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 kobj->kset = kset_get(kobj->kset);
136}
137
138
139/**
140 * unlink - remove kobject from kset list.
141 * @kobj: kobject.
142 *
143 * Remove the kobject from the kset list and decrement
144 * its parent's refcount.
145 * This is separated out, so we can use it in both
146 * kobject_del() and kobject_add() on error.
147 */
148
149static void unlink(struct kobject * kobj)
150{
151 if (kobj->kset) {
152 spin_lock(&kobj->kset->list_lock);
153 list_del_init(&kobj->entry);
154 spin_unlock(&kobj->kset->list_lock);
155 }
156 kobject_put(kobj);
157}
158
159/**
160 * kobject_add - add an object to the hierarchy.
161 * @kobj: object.
Eric W. Biedermanb592fcf2007-01-24 12:35:52 -0700162 * @shadow_parent: sysfs directory to add to.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 */
164
Eric W. Biedermanb592fcf2007-01-24 12:35:52 -0700165int kobject_shadow_add(struct kobject * kobj, struct dentry *shadow_parent)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166{
167 int error = 0;
168 struct kobject * parent;
169
170 if (!(kobj = kobject_get(kobj)))
171 return -ENOENT;
172 if (!kobj->k_name)
173 kobj->k_name = kobj->name;
Martin Stoilov13507702007-02-05 16:15:23 -0800174 if (!*kobj->k_name) {
Greg Kroah-Hartmanc171fef2006-01-20 14:08:59 -0800175 pr_debug("kobject attempted to be registered with no name!\n");
176 WARN_ON(1);
177 return -EINVAL;
178 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 parent = kobject_get(kobj->parent);
180
181 pr_debug("kobject %s: registering. parent: %s, set: %s\n",
182 kobject_name(kobj), parent ? kobject_name(parent) : "<NULL>",
183 kobj->kset ? kobj->kset->kobj.name : "<NULL>" );
184
185 if (kobj->kset) {
186 spin_lock(&kobj->kset->list_lock);
187
188 if (!parent)
189 parent = kobject_get(&kobj->kset->kobj);
190
191 list_add_tail(&kobj->entry,&kobj->kset->list);
192 spin_unlock(&kobj->kset->list_lock);
193 }
194 kobj->parent = parent;
195
Eric W. Biedermanb592fcf2007-01-24 12:35:52 -0700196 error = create_dir(kobj, shadow_parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 if (error) {
198 /* unlink does the kobject_put() for us */
199 unlink(kobj);
Mariusz Kozlowskib067db42007-01-02 13:44:44 +0100200 kobject_put(parent);
Greg Kroah-Hartmandcd0da02006-03-20 13:17:13 -0800201
202 /* be noisy on error issues */
203 if (error == -EEXIST)
Greg Kroah-Hartman183bd5b2006-05-18 10:39:21 -0700204 printk("kobject_add failed for %s with -EEXIST, "
Greg Kroah-Hartmandcd0da02006-03-20 13:17:13 -0800205 "don't try to register things with the "
206 "same name in the same directory.\n",
207 kobject_name(kobj));
208 else
Greg Kroah-Hartman183bd5b2006-05-18 10:39:21 -0700209 printk("kobject_add failed for %s (%d)\n",
Greg Kroah-Hartmandcd0da02006-03-20 13:17:13 -0800210 kobject_name(kobj), error);
Greg Kroah-Hartman183bd5b2006-05-18 10:39:21 -0700211 dump_stack();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 }
213
214 return error;
215}
216
Eric W. Biedermanb592fcf2007-01-24 12:35:52 -0700217/**
218 * kobject_add - add an object to the hierarchy.
219 * @kobj: object.
220 */
221int kobject_add(struct kobject * kobj)
222{
223 return kobject_shadow_add(kobj, NULL);
224}
225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
227/**
228 * kobject_register - initialize and add an object.
229 * @kobj: object in question.
230 */
231
232int kobject_register(struct kobject * kobj)
233{
Greg Kroah-Hartmandcd0da02006-03-20 13:17:13 -0800234 int error = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 if (kobj) {
236 kobject_init(kobj);
237 error = kobject_add(kobj);
Greg Kroah-Hartmandcd0da02006-03-20 13:17:13 -0800238 if (!error)
Kay Sievers312c0042005-11-16 09:00:00 +0100239 kobject_uevent(kobj, KOBJ_ADD);
Greg Kroah-Hartmandcd0da02006-03-20 13:17:13 -0800240 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 return error;
242}
243
244
245/**
246 * kobject_set_name - Set the name of an object
247 * @kobj: object.
Martin Waitz67be2dd2005-05-01 08:59:26 -0700248 * @fmt: format string used to build the name
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 *
250 * If strlen(name) >= KOBJ_NAME_LEN, then use a dynamically allocated
251 * string that @kobj->k_name points to. Otherwise, use the static
252 * @kobj->name array.
253 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254int kobject_set_name(struct kobject * kobj, const char * fmt, ...)
255{
256 int error = 0;
257 int limit = KOBJ_NAME_LEN;
258 int need;
259 va_list args;
260 char * name;
261
262 /*
263 * First, try the static array
264 */
265 va_start(args,fmt);
266 need = vsnprintf(kobj->name,limit,fmt,args);
267 va_end(args);
268 if (need < limit)
269 name = kobj->name;
270 else {
271 /*
272 * Need more space? Allocate it and try again
273 */
274 limit = need + 1;
275 name = kmalloc(limit,GFP_KERNEL);
276 if (!name) {
277 error = -ENOMEM;
278 goto Done;
279 }
280 va_start(args,fmt);
281 need = vsnprintf(name,limit,fmt,args);
282 va_end(args);
283
284 /* Still? Give up. */
285 if (need >= limit) {
286 kfree(name);
287 error = -EFAULT;
288 goto Done;
289 }
290 }
291
292 /* Free the old name, if necessary. */
293 if (kobj->k_name && kobj->k_name != kobj->name)
294 kfree(kobj->k_name);
295
296 /* Now, set the new name */
297 kobj->k_name = name;
298 Done:
299 return error;
300}
301
302EXPORT_SYMBOL(kobject_set_name);
303
304
305/**
306 * kobject_rename - change the name of an object
307 * @kobj: object in question.
308 * @new_name: object's new name
309 */
310
Dmitry Torokhovf3b4f3c2005-04-26 02:32:00 -0500311int kobject_rename(struct kobject * kobj, const char *new_name)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312{
313 int error = 0;
314
315 kobj = kobject_get(kobj);
316 if (!kobj)
317 return -EINVAL;
Eric W. Biedermanb592fcf2007-01-24 12:35:52 -0700318 if (!kobj->parent)
319 return -EINVAL;
320 error = sysfs_rename_dir(kobj, kobj->parent->dentry, new_name);
321 kobject_put(kobj);
322
323 return error;
324}
325
326/**
327 * kobject_rename - change the name of an object
328 * @kobj: object in question.
Randy Dunlapf95d8822007-02-10 14:41:56 -0800329 * @new_parent: object's new parent
Eric W. Biedermanb592fcf2007-01-24 12:35:52 -0700330 * @new_name: object's new name
331 */
332
333int kobject_shadow_rename(struct kobject * kobj, struct dentry *new_parent,
334 const char *new_name)
335{
336 int error = 0;
337
338 kobj = kobject_get(kobj);
339 if (!kobj)
340 return -EINVAL;
341 error = sysfs_rename_dir(kobj, new_parent, new_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 kobject_put(kobj);
343
344 return error;
345}
346
347/**
Cornelia Huck8a824722006-11-20 17:07:51 +0100348 * kobject_move - move object to another parent
349 * @kobj: object in question.
Cornelia Huckc744aea2007-01-08 20:16:44 +0100350 * @new_parent: object's new parent (can be NULL)
Cornelia Huck8a824722006-11-20 17:07:51 +0100351 */
352
353int kobject_move(struct kobject *kobj, struct kobject *new_parent)
354{
355 int error;
356 struct kobject *old_parent;
357 const char *devpath = NULL;
358 char *devpath_string = NULL;
359 char *envp[2];
360
361 kobj = kobject_get(kobj);
362 if (!kobj)
363 return -EINVAL;
364 new_parent = kobject_get(new_parent);
365 if (!new_parent) {
Cornelia Huckc744aea2007-01-08 20:16:44 +0100366 if (kobj->kset)
367 new_parent = kobject_get(&kobj->kset->kobj);
Cornelia Huck8a824722006-11-20 17:07:51 +0100368 }
369 /* old object path */
370 devpath = kobject_get_path(kobj, GFP_KERNEL);
371 if (!devpath) {
372 error = -ENOMEM;
373 goto out;
374 }
375 devpath_string = kmalloc(strlen(devpath) + 15, GFP_KERNEL);
376 if (!devpath_string) {
377 error = -ENOMEM;
378 goto out;
379 }
380 sprintf(devpath_string, "DEVPATH_OLD=%s", devpath);
381 envp[0] = devpath_string;
382 envp[1] = NULL;
383 error = sysfs_move_dir(kobj, new_parent);
384 if (error)
385 goto out;
386 old_parent = kobj->parent;
387 kobj->parent = new_parent;
388 kobject_put(old_parent);
389 kobject_uevent_env(kobj, KOBJ_MOVE, envp);
390out:
391 kobject_put(kobj);
392 kfree(devpath_string);
393 kfree(devpath);
394 return error;
395}
396
397/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398 * kobject_del - unlink kobject from hierarchy.
399 * @kobj: object.
400 */
401
402void kobject_del(struct kobject * kobj)
403{
Greg Kroah-Hartman31b90252007-01-18 12:23:51 -0800404 if (!kobj)
405 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 sysfs_remove_dir(kobj);
407 unlink(kobj);
408}
409
410/**
411 * kobject_unregister - remove object from hierarchy and decrement refcount.
412 * @kobj: object going away.
413 */
414
415void kobject_unregister(struct kobject * kobj)
416{
Greg Kroah-Hartman31b90252007-01-18 12:23:51 -0800417 if (!kobj)
418 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 pr_debug("kobject %s: unregistering\n",kobject_name(kobj));
Kay Sievers312c0042005-11-16 09:00:00 +0100420 kobject_uevent(kobj, KOBJ_REMOVE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 kobject_del(kobj);
422 kobject_put(kobj);
423}
424
425/**
426 * kobject_get - increment refcount for object.
427 * @kobj: object.
428 */
429
430struct kobject * kobject_get(struct kobject * kobj)
431{
432 if (kobj)
433 kref_get(&kobj->kref);
434 return kobj;
435}
436
437/**
438 * kobject_cleanup - free kobject resources.
439 * @kobj: object.
440 */
441
442void kobject_cleanup(struct kobject * kobj)
443{
444 struct kobj_type * t = get_ktype(kobj);
445 struct kset * s = kobj->kset;
446 struct kobject * parent = kobj->parent;
447
448 pr_debug("kobject %s: cleaning up\n",kobject_name(kobj));
449 if (kobj->k_name != kobj->name)
450 kfree(kobj->k_name);
451 kobj->k_name = NULL;
452 if (t && t->release)
453 t->release(kobj);
454 if (s)
455 kset_put(s);
Mariusz Kozlowskib067db42007-01-02 13:44:44 +0100456 kobject_put(parent);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457}
458
459static void kobject_release(struct kref *kref)
460{
461 kobject_cleanup(container_of(kref, struct kobject, kref));
462}
463
464/**
465 * kobject_put - decrement refcount for object.
466 * @kobj: object.
467 *
468 * Decrement the refcount, and if 0, call kobject_cleanup().
469 */
470void kobject_put(struct kobject * kobj)
471{
472 if (kobj)
473 kref_put(&kobj->kref, kobject_release);
474}
475
476
Jun'ichi Nomura74231722006-03-13 17:14:25 -0500477static void dir_release(struct kobject *kobj)
478{
479 kfree(kobj);
480}
481
482static struct kobj_type dir_ktype = {
483 .release = dir_release,
484 .sysfs_ops = NULL,
485 .default_attrs = NULL,
486};
487
488/**
489 * kobject_add_dir - add sub directory of object.
490 * @parent: object in which a directory is created.
491 * @name: directory name.
492 *
493 * Add a plain directory object as child of given object.
494 */
495struct kobject *kobject_add_dir(struct kobject *parent, const char *name)
496{
497 struct kobject *k;
Randy Dunlap10188012006-07-11 20:49:41 -0700498 int ret;
Jun'ichi Nomura74231722006-03-13 17:14:25 -0500499
500 if (!parent)
501 return NULL;
502
503 k = kzalloc(sizeof(*k), GFP_KERNEL);
504 if (!k)
505 return NULL;
506
507 k->parent = parent;
508 k->ktype = &dir_ktype;
509 kobject_set_name(k, name);
Randy Dunlap10188012006-07-11 20:49:41 -0700510 ret = kobject_register(k);
511 if (ret < 0) {
512 printk(KERN_WARNING "kobject_add_dir: "
513 "kobject_register error: %d\n", ret);
514 kobject_del(k);
515 return NULL;
516 }
Jun'ichi Nomura74231722006-03-13 17:14:25 -0500517
518 return k;
519}
Jun'ichi Nomura74231722006-03-13 17:14:25 -0500520
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521/**
522 * kset_init - initialize a kset for use
523 * @k: kset
524 */
525
526void kset_init(struct kset * k)
527{
528 kobject_init(&k->kobj);
529 INIT_LIST_HEAD(&k->list);
530 spin_lock_init(&k->list_lock);
531}
532
533
534/**
535 * kset_add - add a kset object to the hierarchy.
536 * @k: kset.
537 *
538 * Simply, this adds the kset's embedded kobject to the
539 * hierarchy.
540 * We also try to make sure that the kset's embedded kobject
541 * has a parent before it is added. We only care if the embedded
542 * kobject is not part of a kset itself, since kobject_add()
543 * assigns a parent in that case.
544 * If that is the case, and the kset has a controlling subsystem,
545 * then we set the kset's parent to be said subsystem.
546 */
547
548int kset_add(struct kset * k)
549{
550 if (!k->kobj.parent && !k->kobj.kset && k->subsys)
551 k->kobj.parent = &k->subsys->kset.kobj;
552
553 return kobject_add(&k->kobj);
554}
555
556
557/**
558 * kset_register - initialize and add a kset.
559 * @k: kset.
560 */
561
562int kset_register(struct kset * k)
563{
Greg Kroah-Hartman31b90252007-01-18 12:23:51 -0800564 if (!k)
565 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 kset_init(k);
567 return kset_add(k);
568}
569
570
571/**
572 * kset_unregister - remove a kset.
573 * @k: kset.
574 */
575
576void kset_unregister(struct kset * k)
577{
Greg Kroah-Hartman31b90252007-01-18 12:23:51 -0800578 if (!k)
579 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 kobject_unregister(&k->kobj);
581}
582
583
584/**
585 * kset_find_obj - search for object in kset.
586 * @kset: kset we're looking in.
587 * @name: object's name.
588 *
589 * Lock kset via @kset->subsys, and iterate over @kset->list,
590 * looking for a matching kobject. If matching object is found
591 * take a reference and return the object.
592 */
593
594struct kobject * kset_find_obj(struct kset * kset, const char * name)
595{
596 struct list_head * entry;
597 struct kobject * ret = NULL;
598
599 spin_lock(&kset->list_lock);
600 list_for_each(entry,&kset->list) {
601 struct kobject * k = to_kobj(entry);
602 if (kobject_name(k) && !strcmp(kobject_name(k),name)) {
603 ret = kobject_get(k);
604 break;
605 }
606 }
607 spin_unlock(&kset->list_lock);
608 return ret;
609}
610
611
612void subsystem_init(struct subsystem * s)
613{
614 init_rwsem(&s->rwsem);
615 kset_init(&s->kset);
616}
617
618/**
619 * subsystem_register - register a subsystem.
620 * @s: the subsystem we're registering.
621 *
622 * Once we register the subsystem, we want to make sure that
623 * the kset points back to this subsystem for correct usage of
624 * the rwsem.
625 */
626
627int subsystem_register(struct subsystem * s)
628{
629 int error;
630
Greg Kroah-Hartman31b90252007-01-18 12:23:51 -0800631 if (!s)
632 return -EINVAL;
633
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 subsystem_init(s);
635 pr_debug("subsystem %s: registering\n",s->kset.kobj.name);
636
637 if (!(error = kset_add(&s->kset))) {
638 if (!s->kset.subsys)
639 s->kset.subsys = s;
640 }
641 return error;
642}
643
644void subsystem_unregister(struct subsystem * s)
645{
Greg Kroah-Hartman31b90252007-01-18 12:23:51 -0800646 if (!s)
647 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 pr_debug("subsystem %s: unregistering\n",s->kset.kobj.name);
649 kset_unregister(&s->kset);
650}
651
652
653/**
654 * subsystem_create_file - export sysfs attribute file.
655 * @s: subsystem.
656 * @a: subsystem attribute descriptor.
657 */
658
659int subsys_create_file(struct subsystem * s, struct subsys_attribute * a)
660{
661 int error = 0;
Greg Kroah-Hartman31b90252007-01-18 12:23:51 -0800662
663 if (!s || !a)
664 return -EINVAL;
665
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 if (subsys_get(s)) {
667 error = sysfs_create_file(&s->kset.kobj,&a->attr);
668 subsys_put(s);
669 }
670 return error;
671}
672
673
674/**
675 * subsystem_remove_file - remove sysfs attribute file.
676 * @s: subsystem.
677 * @a: attribute desciptor.
678 */
Adrian Bunk5b3ef142006-04-22 12:14:44 +0200679#if 0
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680void subsys_remove_file(struct subsystem * s, struct subsys_attribute * a)
681{
682 if (subsys_get(s)) {
683 sysfs_remove_file(&s->kset.kobj,&a->attr);
684 subsys_put(s);
685 }
686}
Adrian Bunk5b3ef142006-04-22 12:14:44 +0200687#endif /* 0 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
689EXPORT_SYMBOL(kobject_init);
690EXPORT_SYMBOL(kobject_register);
691EXPORT_SYMBOL(kobject_unregister);
692EXPORT_SYMBOL(kobject_get);
693EXPORT_SYMBOL(kobject_put);
694EXPORT_SYMBOL(kobject_add);
695EXPORT_SYMBOL(kobject_del);
696
697EXPORT_SYMBOL(kset_register);
698EXPORT_SYMBOL(kset_unregister);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700EXPORT_SYMBOL(subsystem_register);
701EXPORT_SYMBOL(subsystem_unregister);
702EXPORT_SYMBOL(subsys_create_file);