This source file includes following definitions.
- cpuidle_sysfs_setup
- show_available_governors
- show_current_driver
- show_current_governor
- store_current_governor
- cpuidle_add_interface
- cpuidle_remove_interface
- to_cpuidle_device
- cpuidle_show
- cpuidle_store
- cpuidle_sysfs_release
- cpuidle_add_s2idle_attr_group
- cpuidle_remove_s2idle_attr_group
- cpuidle_add_s2idle_attr_group
- cpuidle_remove_s2idle_attr_group
- cpuidle_state_show
- cpuidle_state_store
- cpuidle_state_sysfs_release
- cpuidle_free_state_kobj
- cpuidle_add_state_sysfs
- cpuidle_remove_state_sysfs
- show_driver_name
- cpuidle_driver_sysfs_release
- cpuidle_driver_show
- cpuidle_driver_store
- cpuidle_add_driver_sysfs
- cpuidle_remove_driver_sysfs
- cpuidle_add_driver_sysfs
- cpuidle_remove_driver_sysfs
- cpuidle_add_device_sysfs
- cpuidle_remove_device_sysfs
- cpuidle_add_sysfs
- cpuidle_remove_sysfs
1
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8
9 #include <linux/kernel.h>
10 #include <linux/cpuidle.h>
11 #include <linux/sysfs.h>
12 #include <linux/slab.h>
13 #include <linux/cpu.h>
14 #include <linux/completion.h>
15 #include <linux/capability.h>
16 #include <linux/device.h>
17 #include <linux/kobject.h>
18
19 #include "cpuidle.h"
20
21 static unsigned int sysfs_switch;
22 static int __init cpuidle_sysfs_setup(char *unused)
23 {
24 sysfs_switch = 1;
25 return 1;
26 }
27 __setup("cpuidle_sysfs_switch", cpuidle_sysfs_setup);
28
29 static ssize_t show_available_governors(struct device *dev,
30 struct device_attribute *attr,
31 char *buf)
32 {
33 ssize_t i = 0;
34 struct cpuidle_governor *tmp;
35
36 mutex_lock(&cpuidle_lock);
37 list_for_each_entry(tmp, &cpuidle_governors, governor_list) {
38 if (i >= (ssize_t) ((PAGE_SIZE/sizeof(char)) -
39 CPUIDLE_NAME_LEN - 2))
40 goto out;
41 i += scnprintf(&buf[i], CPUIDLE_NAME_LEN, "%s ", tmp->name);
42 }
43
44 out:
45 i+= sprintf(&buf[i], "\n");
46 mutex_unlock(&cpuidle_lock);
47 return i;
48 }
49
50 static ssize_t show_current_driver(struct device *dev,
51 struct device_attribute *attr,
52 char *buf)
53 {
54 ssize_t ret;
55 struct cpuidle_driver *drv;
56
57 spin_lock(&cpuidle_driver_lock);
58 drv = cpuidle_get_driver();
59 if (drv)
60 ret = sprintf(buf, "%s\n", drv->name);
61 else
62 ret = sprintf(buf, "none\n");
63 spin_unlock(&cpuidle_driver_lock);
64
65 return ret;
66 }
67
68 static ssize_t show_current_governor(struct device *dev,
69 struct device_attribute *attr,
70 char *buf)
71 {
72 ssize_t ret;
73
74 mutex_lock(&cpuidle_lock);
75 if (cpuidle_curr_governor)
76 ret = sprintf(buf, "%s\n", cpuidle_curr_governor->name);
77 else
78 ret = sprintf(buf, "none\n");
79 mutex_unlock(&cpuidle_lock);
80
81 return ret;
82 }
83
84 static ssize_t store_current_governor(struct device *dev,
85 struct device_attribute *attr,
86 const char *buf, size_t count)
87 {
88 char gov_name[CPUIDLE_NAME_LEN];
89 int ret = -EINVAL;
90 size_t len = count;
91 struct cpuidle_governor *gov;
92
93 if (!len || len >= sizeof(gov_name))
94 return -EINVAL;
95
96 memcpy(gov_name, buf, len);
97 gov_name[len] = '\0';
98 if (gov_name[len - 1] == '\n')
99 gov_name[--len] = '\0';
100
101 mutex_lock(&cpuidle_lock);
102
103 list_for_each_entry(gov, &cpuidle_governors, governor_list) {
104 if (strlen(gov->name) == len && !strcmp(gov->name, gov_name)) {
105 ret = cpuidle_switch_governor(gov);
106 break;
107 }
108 }
109
110 mutex_unlock(&cpuidle_lock);
111
112 if (ret)
113 return ret;
114 else
115 return count;
116 }
117
118 static DEVICE_ATTR(current_driver, 0444, show_current_driver, NULL);
119 static DEVICE_ATTR(current_governor_ro, 0444, show_current_governor, NULL);
120
121 static struct attribute *cpuidle_default_attrs[] = {
122 &dev_attr_current_driver.attr,
123 &dev_attr_current_governor_ro.attr,
124 NULL
125 };
126
127 static DEVICE_ATTR(available_governors, 0444, show_available_governors, NULL);
128 static DEVICE_ATTR(current_governor, 0644, show_current_governor,
129 store_current_governor);
130
131 static struct attribute *cpuidle_switch_attrs[] = {
132 &dev_attr_available_governors.attr,
133 &dev_attr_current_driver.attr,
134 &dev_attr_current_governor.attr,
135 NULL
136 };
137
138 static struct attribute_group cpuidle_attr_group = {
139 .attrs = cpuidle_default_attrs,
140 .name = "cpuidle",
141 };
142
143
144
145
146 int cpuidle_add_interface(struct device *dev)
147 {
148 if (sysfs_switch)
149 cpuidle_attr_group.attrs = cpuidle_switch_attrs;
150
151 return sysfs_create_group(&dev->kobj, &cpuidle_attr_group);
152 }
153
154
155
156
157 void cpuidle_remove_interface(struct device *dev)
158 {
159 sysfs_remove_group(&dev->kobj, &cpuidle_attr_group);
160 }
161
162 struct cpuidle_attr {
163 struct attribute attr;
164 ssize_t (*show)(struct cpuidle_device *, char *);
165 ssize_t (*store)(struct cpuidle_device *, const char *, size_t count);
166 };
167
168 #define define_one_ro(_name, show) \
169 static struct cpuidle_attr attr_##_name = __ATTR(_name, 0444, show, NULL)
170 #define define_one_rw(_name, show, store) \
171 static struct cpuidle_attr attr_##_name = __ATTR(_name, 0644, show, store)
172
173 #define attr_to_cpuidleattr(a) container_of(a, struct cpuidle_attr, attr)
174
175 struct cpuidle_device_kobj {
176 struct cpuidle_device *dev;
177 struct completion kobj_unregister;
178 struct kobject kobj;
179 };
180
181 static inline struct cpuidle_device *to_cpuidle_device(struct kobject *kobj)
182 {
183 struct cpuidle_device_kobj *kdev =
184 container_of(kobj, struct cpuidle_device_kobj, kobj);
185
186 return kdev->dev;
187 }
188
189 static ssize_t cpuidle_show(struct kobject *kobj, struct attribute *attr,
190 char *buf)
191 {
192 int ret = -EIO;
193 struct cpuidle_device *dev = to_cpuidle_device(kobj);
194 struct cpuidle_attr *cattr = attr_to_cpuidleattr(attr);
195
196 if (cattr->show) {
197 mutex_lock(&cpuidle_lock);
198 ret = cattr->show(dev, buf);
199 mutex_unlock(&cpuidle_lock);
200 }
201 return ret;
202 }
203
204 static ssize_t cpuidle_store(struct kobject *kobj, struct attribute *attr,
205 const char *buf, size_t count)
206 {
207 int ret = -EIO;
208 struct cpuidle_device *dev = to_cpuidle_device(kobj);
209 struct cpuidle_attr *cattr = attr_to_cpuidleattr(attr);
210
211 if (cattr->store) {
212 mutex_lock(&cpuidle_lock);
213 ret = cattr->store(dev, buf, count);
214 mutex_unlock(&cpuidle_lock);
215 }
216 return ret;
217 }
218
219 static const struct sysfs_ops cpuidle_sysfs_ops = {
220 .show = cpuidle_show,
221 .store = cpuidle_store,
222 };
223
224 static void cpuidle_sysfs_release(struct kobject *kobj)
225 {
226 struct cpuidle_device_kobj *kdev =
227 container_of(kobj, struct cpuidle_device_kobj, kobj);
228
229 complete(&kdev->kobj_unregister);
230 }
231
232 static struct kobj_type ktype_cpuidle = {
233 .sysfs_ops = &cpuidle_sysfs_ops,
234 .release = cpuidle_sysfs_release,
235 };
236
237 struct cpuidle_state_attr {
238 struct attribute attr;
239 ssize_t (*show)(struct cpuidle_state *, \
240 struct cpuidle_state_usage *, char *);
241 ssize_t (*store)(struct cpuidle_state *, \
242 struct cpuidle_state_usage *, const char *, size_t);
243 };
244
245 #define define_one_state_ro(_name, show) \
246 static struct cpuidle_state_attr attr_##_name = __ATTR(_name, 0444, show, NULL)
247
248 #define define_one_state_rw(_name, show, store) \
249 static struct cpuidle_state_attr attr_##_name = __ATTR(_name, 0644, show, store)
250
251 #define define_show_state_function(_name) \
252 static ssize_t show_state_##_name(struct cpuidle_state *state, \
253 struct cpuidle_state_usage *state_usage, char *buf) \
254 { \
255 return sprintf(buf, "%u\n", state->_name);\
256 }
257
258 #define define_store_state_ull_function(_name) \
259 static ssize_t store_state_##_name(struct cpuidle_state *state, \
260 struct cpuidle_state_usage *state_usage, \
261 const char *buf, size_t size) \
262 { \
263 unsigned long long value; \
264 int err; \
265 if (!capable(CAP_SYS_ADMIN)) \
266 return -EPERM; \
267 err = kstrtoull(buf, 0, &value); \
268 if (err) \
269 return err; \
270 if (value) \
271 state_usage->_name = 1; \
272 else \
273 state_usage->_name = 0; \
274 return size; \
275 }
276
277 #define define_show_state_ull_function(_name) \
278 static ssize_t show_state_##_name(struct cpuidle_state *state, \
279 struct cpuidle_state_usage *state_usage, \
280 char *buf) \
281 { \
282 return sprintf(buf, "%llu\n", state_usage->_name);\
283 }
284
285 #define define_show_state_str_function(_name) \
286 static ssize_t show_state_##_name(struct cpuidle_state *state, \
287 struct cpuidle_state_usage *state_usage, \
288 char *buf) \
289 { \
290 if (state->_name[0] == '\0')\
291 return sprintf(buf, "<null>\n");\
292 return sprintf(buf, "%s\n", state->_name);\
293 }
294
295 define_show_state_function(exit_latency)
296 define_show_state_function(target_residency)
297 define_show_state_function(power_usage)
298 define_show_state_ull_function(usage)
299 define_show_state_ull_function(time)
300 define_show_state_str_function(name)
301 define_show_state_str_function(desc)
302 define_show_state_ull_function(disable)
303 define_store_state_ull_function(disable)
304 define_show_state_ull_function(above)
305 define_show_state_ull_function(below)
306
307 define_one_state_ro(name, show_state_name);
308 define_one_state_ro(desc, show_state_desc);
309 define_one_state_ro(latency, show_state_exit_latency);
310 define_one_state_ro(residency, show_state_target_residency);
311 define_one_state_ro(power, show_state_power_usage);
312 define_one_state_ro(usage, show_state_usage);
313 define_one_state_ro(time, show_state_time);
314 define_one_state_rw(disable, show_state_disable, store_state_disable);
315 define_one_state_ro(above, show_state_above);
316 define_one_state_ro(below, show_state_below);
317
318 static struct attribute *cpuidle_state_default_attrs[] = {
319 &attr_name.attr,
320 &attr_desc.attr,
321 &attr_latency.attr,
322 &attr_residency.attr,
323 &attr_power.attr,
324 &attr_usage.attr,
325 &attr_time.attr,
326 &attr_disable.attr,
327 &attr_above.attr,
328 &attr_below.attr,
329 NULL
330 };
331
332 struct cpuidle_state_kobj {
333 struct cpuidle_state *state;
334 struct cpuidle_state_usage *state_usage;
335 struct completion kobj_unregister;
336 struct kobject kobj;
337 struct cpuidle_device *device;
338 };
339
340 #ifdef CONFIG_SUSPEND
341 #define define_show_state_s2idle_ull_function(_name) \
342 static ssize_t show_state_s2idle_##_name(struct cpuidle_state *state, \
343 struct cpuidle_state_usage *state_usage, \
344 char *buf) \
345 { \
346 return sprintf(buf, "%llu\n", state_usage->s2idle_##_name);\
347 }
348
349 define_show_state_s2idle_ull_function(usage);
350 define_show_state_s2idle_ull_function(time);
351
352 #define define_one_state_s2idle_ro(_name, show) \
353 static struct cpuidle_state_attr attr_s2idle_##_name = \
354 __ATTR(_name, 0444, show, NULL)
355
356 define_one_state_s2idle_ro(usage, show_state_s2idle_usage);
357 define_one_state_s2idle_ro(time, show_state_s2idle_time);
358
359 static struct attribute *cpuidle_state_s2idle_attrs[] = {
360 &attr_s2idle_usage.attr,
361 &attr_s2idle_time.attr,
362 NULL
363 };
364
365 static const struct attribute_group cpuidle_state_s2idle_group = {
366 .name = "s2idle",
367 .attrs = cpuidle_state_s2idle_attrs,
368 };
369
370 static void cpuidle_add_s2idle_attr_group(struct cpuidle_state_kobj *kobj)
371 {
372 int ret;
373
374 if (!kobj->state->enter_s2idle)
375 return;
376
377 ret = sysfs_create_group(&kobj->kobj, &cpuidle_state_s2idle_group);
378 if (ret)
379 pr_debug("%s: sysfs attribute group not created\n", __func__);
380 }
381
382 static void cpuidle_remove_s2idle_attr_group(struct cpuidle_state_kobj *kobj)
383 {
384 if (kobj->state->enter_s2idle)
385 sysfs_remove_group(&kobj->kobj, &cpuidle_state_s2idle_group);
386 }
387 #else
388 static inline void cpuidle_add_s2idle_attr_group(struct cpuidle_state_kobj *kobj) { }
389 static inline void cpuidle_remove_s2idle_attr_group(struct cpuidle_state_kobj *kobj) { }
390 #endif
391
392 #define kobj_to_state_obj(k) container_of(k, struct cpuidle_state_kobj, kobj)
393 #define kobj_to_state(k) (kobj_to_state_obj(k)->state)
394 #define kobj_to_state_usage(k) (kobj_to_state_obj(k)->state_usage)
395 #define kobj_to_device(k) (kobj_to_state_obj(k)->device)
396 #define attr_to_stateattr(a) container_of(a, struct cpuidle_state_attr, attr)
397
398 static ssize_t cpuidle_state_show(struct kobject *kobj, struct attribute *attr,
399 char * buf)
400 {
401 int ret = -EIO;
402 struct cpuidle_state *state = kobj_to_state(kobj);
403 struct cpuidle_state_usage *state_usage = kobj_to_state_usage(kobj);
404 struct cpuidle_state_attr * cattr = attr_to_stateattr(attr);
405
406 if (cattr->show)
407 ret = cattr->show(state, state_usage, buf);
408
409 return ret;
410 }
411
412 static ssize_t cpuidle_state_store(struct kobject *kobj, struct attribute *attr,
413 const char *buf, size_t size)
414 {
415 int ret = -EIO;
416 struct cpuidle_state *state = kobj_to_state(kobj);
417 struct cpuidle_state_usage *state_usage = kobj_to_state_usage(kobj);
418 struct cpuidle_state_attr *cattr = attr_to_stateattr(attr);
419 struct cpuidle_device *dev = kobj_to_device(kobj);
420
421 if (cattr->store)
422 ret = cattr->store(state, state_usage, buf, size);
423
424
425 dev->poll_limit_ns = 0;
426
427 return ret;
428 }
429
430 static const struct sysfs_ops cpuidle_state_sysfs_ops = {
431 .show = cpuidle_state_show,
432 .store = cpuidle_state_store,
433 };
434
435 static void cpuidle_state_sysfs_release(struct kobject *kobj)
436 {
437 struct cpuidle_state_kobj *state_obj = kobj_to_state_obj(kobj);
438
439 complete(&state_obj->kobj_unregister);
440 }
441
442 static struct kobj_type ktype_state_cpuidle = {
443 .sysfs_ops = &cpuidle_state_sysfs_ops,
444 .default_attrs = cpuidle_state_default_attrs,
445 .release = cpuidle_state_sysfs_release,
446 };
447
448 static inline void cpuidle_free_state_kobj(struct cpuidle_device *device, int i)
449 {
450 cpuidle_remove_s2idle_attr_group(device->kobjs[i]);
451 kobject_put(&device->kobjs[i]->kobj);
452 wait_for_completion(&device->kobjs[i]->kobj_unregister);
453 kfree(device->kobjs[i]);
454 device->kobjs[i] = NULL;
455 }
456
457
458
459
460
461 static int cpuidle_add_state_sysfs(struct cpuidle_device *device)
462 {
463 int i, ret = -ENOMEM;
464 struct cpuidle_state_kobj *kobj;
465 struct cpuidle_device_kobj *kdev = device->kobj_dev;
466 struct cpuidle_driver *drv = cpuidle_get_cpu_driver(device);
467
468
469 for (i = 0; i < drv->state_count; i++) {
470 kobj = kzalloc(sizeof(struct cpuidle_state_kobj), GFP_KERNEL);
471 if (!kobj) {
472 ret = -ENOMEM;
473 goto error_state;
474 }
475 kobj->state = &drv->states[i];
476 kobj->state_usage = &device->states_usage[i];
477 kobj->device = device;
478 init_completion(&kobj->kobj_unregister);
479
480 ret = kobject_init_and_add(&kobj->kobj, &ktype_state_cpuidle,
481 &kdev->kobj, "state%d", i);
482 if (ret) {
483 kfree(kobj);
484 goto error_state;
485 }
486 cpuidle_add_s2idle_attr_group(kobj);
487 kobject_uevent(&kobj->kobj, KOBJ_ADD);
488 device->kobjs[i] = kobj;
489 }
490
491 return 0;
492
493 error_state:
494 for (i = i - 1; i >= 0; i--)
495 cpuidle_free_state_kobj(device, i);
496 return ret;
497 }
498
499
500
501
502
503 static void cpuidle_remove_state_sysfs(struct cpuidle_device *device)
504 {
505 struct cpuidle_driver *drv = cpuidle_get_cpu_driver(device);
506 int i;
507
508 for (i = 0; i < drv->state_count; i++)
509 cpuidle_free_state_kobj(device, i);
510 }
511
512 #ifdef CONFIG_CPU_IDLE_MULTIPLE_DRIVERS
513 #define kobj_to_driver_kobj(k) container_of(k, struct cpuidle_driver_kobj, kobj)
514 #define attr_to_driver_attr(a) container_of(a, struct cpuidle_driver_attr, attr)
515
516 #define define_one_driver_ro(_name, show) \
517 static struct cpuidle_driver_attr attr_driver_##_name = \
518 __ATTR(_name, 0444, show, NULL)
519
520 struct cpuidle_driver_kobj {
521 struct cpuidle_driver *drv;
522 struct completion kobj_unregister;
523 struct kobject kobj;
524 };
525
526 struct cpuidle_driver_attr {
527 struct attribute attr;
528 ssize_t (*show)(struct cpuidle_driver *, char *);
529 ssize_t (*store)(struct cpuidle_driver *, const char *, size_t);
530 };
531
532 static ssize_t show_driver_name(struct cpuidle_driver *drv, char *buf)
533 {
534 ssize_t ret;
535
536 spin_lock(&cpuidle_driver_lock);
537 ret = sprintf(buf, "%s\n", drv ? drv->name : "none");
538 spin_unlock(&cpuidle_driver_lock);
539
540 return ret;
541 }
542
543 static void cpuidle_driver_sysfs_release(struct kobject *kobj)
544 {
545 struct cpuidle_driver_kobj *driver_kobj = kobj_to_driver_kobj(kobj);
546 complete(&driver_kobj->kobj_unregister);
547 }
548
549 static ssize_t cpuidle_driver_show(struct kobject *kobj, struct attribute *attr,
550 char *buf)
551 {
552 int ret = -EIO;
553 struct cpuidle_driver_kobj *driver_kobj = kobj_to_driver_kobj(kobj);
554 struct cpuidle_driver_attr *dattr = attr_to_driver_attr(attr);
555
556 if (dattr->show)
557 ret = dattr->show(driver_kobj->drv, buf);
558
559 return ret;
560 }
561
562 static ssize_t cpuidle_driver_store(struct kobject *kobj, struct attribute *attr,
563 const char *buf, size_t size)
564 {
565 int ret = -EIO;
566 struct cpuidle_driver_kobj *driver_kobj = kobj_to_driver_kobj(kobj);
567 struct cpuidle_driver_attr *dattr = attr_to_driver_attr(attr);
568
569 if (dattr->store)
570 ret = dattr->store(driver_kobj->drv, buf, size);
571
572 return ret;
573 }
574
575 define_one_driver_ro(name, show_driver_name);
576
577 static const struct sysfs_ops cpuidle_driver_sysfs_ops = {
578 .show = cpuidle_driver_show,
579 .store = cpuidle_driver_store,
580 };
581
582 static struct attribute *cpuidle_driver_default_attrs[] = {
583 &attr_driver_name.attr,
584 NULL
585 };
586
587 static struct kobj_type ktype_driver_cpuidle = {
588 .sysfs_ops = &cpuidle_driver_sysfs_ops,
589 .default_attrs = cpuidle_driver_default_attrs,
590 .release = cpuidle_driver_sysfs_release,
591 };
592
593
594
595
596
597 static int cpuidle_add_driver_sysfs(struct cpuidle_device *dev)
598 {
599 struct cpuidle_driver_kobj *kdrv;
600 struct cpuidle_device_kobj *kdev = dev->kobj_dev;
601 struct cpuidle_driver *drv = cpuidle_get_cpu_driver(dev);
602 int ret;
603
604 kdrv = kzalloc(sizeof(*kdrv), GFP_KERNEL);
605 if (!kdrv)
606 return -ENOMEM;
607
608 kdrv->drv = drv;
609 init_completion(&kdrv->kobj_unregister);
610
611 ret = kobject_init_and_add(&kdrv->kobj, &ktype_driver_cpuidle,
612 &kdev->kobj, "driver");
613 if (ret) {
614 kfree(kdrv);
615 return ret;
616 }
617
618 kobject_uevent(&kdrv->kobj, KOBJ_ADD);
619 dev->kobj_driver = kdrv;
620
621 return ret;
622 }
623
624
625
626
627
628 static void cpuidle_remove_driver_sysfs(struct cpuidle_device *dev)
629 {
630 struct cpuidle_driver_kobj *kdrv = dev->kobj_driver;
631 kobject_put(&kdrv->kobj);
632 wait_for_completion(&kdrv->kobj_unregister);
633 kfree(kdrv);
634 }
635 #else
636 static inline int cpuidle_add_driver_sysfs(struct cpuidle_device *dev)
637 {
638 return 0;
639 }
640
641 static inline void cpuidle_remove_driver_sysfs(struct cpuidle_device *dev)
642 {
643 ;
644 }
645 #endif
646
647
648
649
650
651 int cpuidle_add_device_sysfs(struct cpuidle_device *device)
652 {
653 int ret;
654
655 ret = cpuidle_add_state_sysfs(device);
656 if (ret)
657 return ret;
658
659 ret = cpuidle_add_driver_sysfs(device);
660 if (ret)
661 cpuidle_remove_state_sysfs(device);
662 return ret;
663 }
664
665
666
667
668
669 void cpuidle_remove_device_sysfs(struct cpuidle_device *device)
670 {
671 cpuidle_remove_driver_sysfs(device);
672 cpuidle_remove_state_sysfs(device);
673 }
674
675
676
677
678
679 int cpuidle_add_sysfs(struct cpuidle_device *dev)
680 {
681 struct cpuidle_device_kobj *kdev;
682 struct device *cpu_dev = get_cpu_device((unsigned long)dev->cpu);
683 int error;
684
685
686
687
688
689
690
691
692
693
694 if (!cpu_dev)
695 return -ENODEV;
696
697 kdev = kzalloc(sizeof(*kdev), GFP_KERNEL);
698 if (!kdev)
699 return -ENOMEM;
700 kdev->dev = dev;
701 dev->kobj_dev = kdev;
702
703 init_completion(&kdev->kobj_unregister);
704
705 error = kobject_init_and_add(&kdev->kobj, &ktype_cpuidle, &cpu_dev->kobj,
706 "cpuidle");
707 if (error) {
708 kfree(kdev);
709 return error;
710 }
711
712 kobject_uevent(&kdev->kobj, KOBJ_ADD);
713
714 return 0;
715 }
716
717
718
719
720
721 void cpuidle_remove_sysfs(struct cpuidle_device *dev)
722 {
723 struct cpuidle_device_kobj *kdev = dev->kobj_dev;
724
725 kobject_put(&kdev->kobj);
726 wait_for_completion(&kdev->kobj_unregister);
727 kfree(kdev);
728 }