Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * workqueue.h --- work queue handling for Linux. | |
3 | */ | |
4 | ||
5 | #ifndef _LINUX_WORKQUEUE_H | |
6 | #define _LINUX_WORKQUEUE_H | |
7 | ||
8 | #include <linux/timer.h> | |
9 | #include <linux/linkage.h> | |
10 | #include <linux/bitops.h> | |
4e6045f1 | 11 | #include <linux/lockdep.h> |
7a22ad75 | 12 | #include <linux/threads.h> |
a08727ba | 13 | #include <asm/atomic.h> |
1da177e4 LT |
14 | |
15 | struct workqueue_struct; | |
16 | ||
65f27f38 DH |
17 | struct work_struct; |
18 | typedef void (*work_func_t)(struct work_struct *work); | |
6bb49e59 | 19 | |
a08727ba LT |
20 | /* |
21 | * The first word is the work queue pointer and the flags rolled into | |
22 | * one | |
23 | */ | |
24 | #define work_data_bits(work) ((unsigned long *)(&(work)->data)) | |
25 | ||
22df02bb TH |
26 | enum { |
27 | WORK_STRUCT_PENDING_BIT = 0, /* work item is pending execution */ | |
8a2e8e5d TH |
28 | WORK_STRUCT_DELAYED_BIT = 1, /* work item is delayed */ |
29 | WORK_STRUCT_CWQ_BIT = 2, /* data points to cwq */ | |
30 | WORK_STRUCT_LINKED_BIT = 3, /* next work is linked to this one */ | |
22df02bb | 31 | #ifdef CONFIG_DEBUG_OBJECTS_WORK |
8a2e8e5d TH |
32 | WORK_STRUCT_STATIC_BIT = 4, /* static initializer (debugobjects) */ |
33 | WORK_STRUCT_COLOR_SHIFT = 5, /* color for workqueue flushing */ | |
0f900049 | 34 | #else |
8a2e8e5d | 35 | WORK_STRUCT_COLOR_SHIFT = 4, /* color for workqueue flushing */ |
22df02bb TH |
36 | #endif |
37 | ||
73f53c4a TH |
38 | WORK_STRUCT_COLOR_BITS = 4, |
39 | ||
22df02bb | 40 | WORK_STRUCT_PENDING = 1 << WORK_STRUCT_PENDING_BIT, |
8a2e8e5d | 41 | WORK_STRUCT_DELAYED = 1 << WORK_STRUCT_DELAYED_BIT, |
e120153d | 42 | WORK_STRUCT_CWQ = 1 << WORK_STRUCT_CWQ_BIT, |
affee4b2 | 43 | WORK_STRUCT_LINKED = 1 << WORK_STRUCT_LINKED_BIT, |
22df02bb TH |
44 | #ifdef CONFIG_DEBUG_OBJECTS_WORK |
45 | WORK_STRUCT_STATIC = 1 << WORK_STRUCT_STATIC_BIT, | |
46 | #else | |
47 | WORK_STRUCT_STATIC = 0, | |
48 | #endif | |
49 | ||
73f53c4a TH |
50 | /* |
51 | * The last color is no color used for works which don't | |
52 | * participate in workqueue flushing. | |
53 | */ | |
54 | WORK_NR_COLORS = (1 << WORK_STRUCT_COLOR_BITS) - 1, | |
55 | WORK_NO_COLOR = WORK_NR_COLORS, | |
56 | ||
bdbc5dd7 | 57 | /* special cpu IDs */ |
f3421797 TH |
58 | WORK_CPU_UNBOUND = NR_CPUS, |
59 | WORK_CPU_NONE = NR_CPUS + 1, | |
bdbc5dd7 TH |
60 | WORK_CPU_LAST = WORK_CPU_NONE, |
61 | ||
73f53c4a | 62 | /* |
e120153d | 63 | * Reserve 7 bits off of cwq pointer w/ debugobjects turned |
8a2e8e5d TH |
64 | * off. This makes cwqs aligned to 256 bytes and allows 15 |
65 | * workqueue flush colors. | |
73f53c4a TH |
66 | */ |
67 | WORK_STRUCT_FLAG_BITS = WORK_STRUCT_COLOR_SHIFT + | |
68 | WORK_STRUCT_COLOR_BITS, | |
69 | ||
0f900049 | 70 | WORK_STRUCT_FLAG_MASK = (1UL << WORK_STRUCT_FLAG_BITS) - 1, |
22df02bb | 71 | WORK_STRUCT_WQ_DATA_MASK = ~WORK_STRUCT_FLAG_MASK, |
bdbc5dd7 | 72 | WORK_STRUCT_NO_CPU = WORK_CPU_NONE << WORK_STRUCT_FLAG_BITS, |
dcd989cb TH |
73 | |
74 | /* bit mask for work_busy() return values */ | |
75 | WORK_BUSY_PENDING = 1 << 0, | |
76 | WORK_BUSY_RUNNING = 1 << 1, | |
22df02bb TH |
77 | }; |
78 | ||
1da177e4 | 79 | struct work_struct { |
a08727ba | 80 | atomic_long_t data; |
1da177e4 | 81 | struct list_head entry; |
6bb49e59 | 82 | work_func_t func; |
4e6045f1 JB |
83 | #ifdef CONFIG_LOCKDEP |
84 | struct lockdep_map lockdep_map; | |
85 | #endif | |
52bad64d DH |
86 | }; |
87 | ||
7a22ad75 TH |
88 | #define WORK_DATA_INIT() ATOMIC_LONG_INIT(WORK_STRUCT_NO_CPU) |
89 | #define WORK_DATA_STATIC_INIT() \ | |
90 | ATOMIC_LONG_INIT(WORK_STRUCT_NO_CPU | WORK_STRUCT_STATIC) | |
a08727ba | 91 | |
52bad64d DH |
92 | struct delayed_work { |
93 | struct work_struct work; | |
1da177e4 LT |
94 | struct timer_list timer; |
95 | }; | |
96 | ||
bf6aede7 JD |
97 | static inline struct delayed_work *to_delayed_work(struct work_struct *work) |
98 | { | |
99 | return container_of(work, struct delayed_work, work); | |
100 | } | |
101 | ||
1fa44eca JB |
102 | struct execute_work { |
103 | struct work_struct work; | |
104 | }; | |
105 | ||
4e6045f1 JB |
106 | #ifdef CONFIG_LOCKDEP |
107 | /* | |
108 | * NB: because we have to copy the lockdep_map, setting _key | |
109 | * here is required, otherwise it could get initialised to the | |
110 | * copy of the lockdep_map! | |
111 | */ | |
112 | #define __WORK_INIT_LOCKDEP_MAP(n, k) \ | |
113 | .lockdep_map = STATIC_LOCKDEP_MAP_INIT(n, k), | |
114 | #else | |
115 | #define __WORK_INIT_LOCKDEP_MAP(n, k) | |
116 | #endif | |
117 | ||
65f27f38 | 118 | #define __WORK_INITIALIZER(n, f) { \ |
dc186ad7 | 119 | .data = WORK_DATA_STATIC_INIT(), \ |
23b2e599 | 120 | .entry = { &(n).entry, &(n).entry }, \ |
65f27f38 | 121 | .func = (f), \ |
4e6045f1 | 122 | __WORK_INIT_LOCKDEP_MAP(#n, &(n)) \ |
65f27f38 DH |
123 | } |
124 | ||
125 | #define __DELAYED_WORK_INITIALIZER(n, f) { \ | |
126 | .work = __WORK_INITIALIZER((n).work, (f)), \ | |
127 | .timer = TIMER_INITIALIZER(NULL, 0, 0), \ | |
128 | } | |
129 | ||
65f27f38 DH |
130 | #define DECLARE_WORK(n, f) \ |
131 | struct work_struct n = __WORK_INITIALIZER(n, f) | |
132 | ||
65f27f38 DH |
133 | #define DECLARE_DELAYED_WORK(n, f) \ |
134 | struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f) | |
135 | ||
1da177e4 | 136 | /* |
65f27f38 | 137 | * initialize a work item's function pointer |
1da177e4 | 138 | */ |
65f27f38 | 139 | #define PREPARE_WORK(_work, _func) \ |
1da177e4 | 140 | do { \ |
52bad64d | 141 | (_work)->func = (_func); \ |
1da177e4 LT |
142 | } while (0) |
143 | ||
65f27f38 DH |
144 | #define PREPARE_DELAYED_WORK(_work, _func) \ |
145 | PREPARE_WORK(&(_work)->work, (_func)) | |
52bad64d | 146 | |
dc186ad7 TG |
147 | #ifdef CONFIG_DEBUG_OBJECTS_WORK |
148 | extern void __init_work(struct work_struct *work, int onstack); | |
149 | extern void destroy_work_on_stack(struct work_struct *work); | |
4690c4ab TH |
150 | static inline unsigned int work_static(struct work_struct *work) |
151 | { | |
22df02bb | 152 | return *work_data_bits(work) & WORK_STRUCT_STATIC; |
4690c4ab | 153 | } |
dc186ad7 TG |
154 | #else |
155 | static inline void __init_work(struct work_struct *work, int onstack) { } | |
156 | static inline void destroy_work_on_stack(struct work_struct *work) { } | |
4690c4ab | 157 | static inline unsigned int work_static(struct work_struct *work) { return 0; } |
dc186ad7 TG |
158 | #endif |
159 | ||
1da177e4 | 160 | /* |
52bad64d | 161 | * initialize all of a work item in one go |
a08727ba | 162 | * |
b9049df5 | 163 | * NOTE! No point in using "atomic_long_set()": using a direct |
a08727ba LT |
164 | * assignment of the work data initializer allows the compiler |
165 | * to generate better code. | |
1da177e4 | 166 | */ |
4e6045f1 | 167 | #ifdef CONFIG_LOCKDEP |
dc186ad7 | 168 | #define __INIT_WORK(_work, _func, _onstack) \ |
65f27f38 | 169 | do { \ |
4e6045f1 JB |
170 | static struct lock_class_key __key; \ |
171 | \ | |
dc186ad7 | 172 | __init_work((_work), _onstack); \ |
23b2e599 | 173 | (_work)->data = (atomic_long_t) WORK_DATA_INIT(); \ |
4e6045f1 | 174 | lockdep_init_map(&(_work)->lockdep_map, #_work, &__key, 0);\ |
65f27f38 DH |
175 | INIT_LIST_HEAD(&(_work)->entry); \ |
176 | PREPARE_WORK((_work), (_func)); \ | |
177 | } while (0) | |
4e6045f1 | 178 | #else |
dc186ad7 | 179 | #define __INIT_WORK(_work, _func, _onstack) \ |
4e6045f1 | 180 | do { \ |
dc186ad7 | 181 | __init_work((_work), _onstack); \ |
4e6045f1 JB |
182 | (_work)->data = (atomic_long_t) WORK_DATA_INIT(); \ |
183 | INIT_LIST_HEAD(&(_work)->entry); \ | |
184 | PREPARE_WORK((_work), (_func)); \ | |
185 | } while (0) | |
186 | #endif | |
65f27f38 | 187 | |
dc186ad7 TG |
188 | #define INIT_WORK(_work, _func) \ |
189 | do { \ | |
190 | __INIT_WORK((_work), (_func), 0); \ | |
191 | } while (0) | |
192 | ||
ca1cab37 | 193 | #define INIT_WORK_ONSTACK(_work, _func) \ |
dc186ad7 TG |
194 | do { \ |
195 | __INIT_WORK((_work), (_func), 1); \ | |
196 | } while (0) | |
197 | ||
65f27f38 DH |
198 | #define INIT_DELAYED_WORK(_work, _func) \ |
199 | do { \ | |
200 | INIT_WORK(&(_work)->work, (_func)); \ | |
201 | init_timer(&(_work)->timer); \ | |
52bad64d DH |
202 | } while (0) |
203 | ||
ca1cab37 | 204 | #define INIT_DELAYED_WORK_ONSTACK(_work, _func) \ |
6d612b0f | 205 | do { \ |
ca1cab37 | 206 | INIT_WORK_ONSTACK(&(_work)->work, (_func)); \ |
6d612b0f PZ |
207 | init_timer_on_stack(&(_work)->timer); \ |
208 | } while (0) | |
209 | ||
dc186ad7 | 210 | #define INIT_DELAYED_WORK_DEFERRABLE(_work, _func) \ |
28287033 VP |
211 | do { \ |
212 | INIT_WORK(&(_work)->work, (_func)); \ | |
213 | init_timer_deferrable(&(_work)->timer); \ | |
214 | } while (0) | |
215 | ||
365970a1 DH |
216 | /** |
217 | * work_pending - Find out whether a work item is currently pending | |
218 | * @work: The work item in question | |
219 | */ | |
220 | #define work_pending(work) \ | |
22df02bb | 221 | test_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work)) |
365970a1 DH |
222 | |
223 | /** | |
224 | * delayed_work_pending - Find out whether a delayable work item is currently | |
225 | * pending | |
226 | * @work: The work item in question | |
227 | */ | |
0221872a LT |
228 | #define delayed_work_pending(w) \ |
229 | work_pending(&(w)->work) | |
365970a1 | 230 | |
65f27f38 | 231 | /** |
23b2e599 ON |
232 | * work_clear_pending - for internal use only, mark a work item as not pending |
233 | * @work: The work item in question | |
65f27f38 | 234 | */ |
23b2e599 | 235 | #define work_clear_pending(work) \ |
22df02bb | 236 | clear_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work)) |
65f27f38 | 237 | |
c54fce6e TH |
238 | /* |
239 | * Workqueue flags and constants. For details, please refer to | |
240 | * Documentation/workqueue.txt. | |
241 | */ | |
97e37d7b | 242 | enum { |
bdbc5dd7 | 243 | WQ_NON_REENTRANT = 1 << 0, /* guarantee non-reentrance */ |
c7fc77f7 | 244 | WQ_UNBOUND = 1 << 1, /* not bound to any cpu */ |
bdbc5dd7 | 245 | WQ_FREEZEABLE = 1 << 2, /* freeze during suspend */ |
6370a6ad | 246 | WQ_MEM_RECLAIM = 1 << 3, /* may be used for memory reclaim */ |
649027d7 | 247 | WQ_HIGHPRI = 1 << 4, /* high priority */ |
fb0e7beb | 248 | WQ_CPU_INTENSIVE = 1 << 5, /* cpu instensive workqueue */ |
b71ab8c2 | 249 | |
e41e704b | 250 | WQ_DYING = 1 << 6, /* internal: workqueue is dying */ |
6370a6ad | 251 | WQ_RESCUER = 1 << 7, /* internal: workqueue has rescuer */ |
e41e704b | 252 | |
b71ab8c2 | 253 | WQ_MAX_ACTIVE = 512, /* I like 512, better ideas? */ |
f3421797 | 254 | WQ_MAX_UNBOUND_PER_CPU = 4, /* 4 * #cpus for unbound wq */ |
b71ab8c2 | 255 | WQ_DFL_ACTIVE = WQ_MAX_ACTIVE / 2, |
97e37d7b | 256 | }; |
52bad64d | 257 | |
f3421797 TH |
258 | /* unbound wq's aren't per-cpu, scale max_active according to #cpus */ |
259 | #define WQ_UNBOUND_MAX_ACTIVE \ | |
260 | max_t(int, WQ_MAX_ACTIVE, num_possible_cpus() * WQ_MAX_UNBOUND_PER_CPU) | |
65f27f38 | 261 | |
d320c038 TH |
262 | /* |
263 | * System-wide workqueues which are always present. | |
264 | * | |
265 | * system_wq is the one used by schedule[_delayed]_work[_on](). | |
266 | * Multi-CPU multi-threaded. There are users which expect relatively | |
267 | * short queue flush time. Don't queue works which can run for too | |
268 | * long. | |
269 | * | |
270 | * system_long_wq is similar to system_wq but may host long running | |
271 | * works. Queue flushing might take relatively long. | |
272 | * | |
273 | * system_nrt_wq is non-reentrant and guarantees that any given work | |
274 | * item is never executed in parallel by multiple CPUs. Queue | |
275 | * flushing might take relatively long. | |
f3421797 TH |
276 | * |
277 | * system_unbound_wq is unbound workqueue. Workers are not bound to | |
278 | * any specific CPU, not concurrency managed, and all queued works are | |
279 | * executed immediately as long as max_active limit is not reached and | |
280 | * resources are available. | |
d320c038 TH |
281 | */ |
282 | extern struct workqueue_struct *system_wq; | |
283 | extern struct workqueue_struct *system_long_wq; | |
284 | extern struct workqueue_struct *system_nrt_wq; | |
f3421797 | 285 | extern struct workqueue_struct *system_unbound_wq; |
52bad64d | 286 | |
4e6045f1 | 287 | extern struct workqueue_struct * |
d320c038 TH |
288 | __alloc_workqueue_key(const char *name, unsigned int flags, int max_active, |
289 | struct lock_class_key *key, const char *lock_name); | |
4e6045f1 JB |
290 | |
291 | #ifdef CONFIG_LOCKDEP | |
d320c038 | 292 | #define alloc_workqueue(name, flags, max_active) \ |
4e6045f1 JB |
293 | ({ \ |
294 | static struct lock_class_key __key; \ | |
eb13ba87 JB |
295 | const char *__lock_name; \ |
296 | \ | |
297 | if (__builtin_constant_p(name)) \ | |
298 | __lock_name = (name); \ | |
299 | else \ | |
300 | __lock_name = #name; \ | |
4e6045f1 | 301 | \ |
d320c038 TH |
302 | __alloc_workqueue_key((name), (flags), (max_active), \ |
303 | &__key, __lock_name); \ | |
4e6045f1 JB |
304 | }) |
305 | #else | |
d320c038 TH |
306 | #define alloc_workqueue(name, flags, max_active) \ |
307 | __alloc_workqueue_key((name), (flags), (max_active), NULL, NULL) | |
4e6045f1 JB |
308 | #endif |
309 | ||
81dcaf65 TH |
310 | /** |
311 | * alloc_ordered_workqueue - allocate an ordered workqueue | |
312 | * @name: name of the workqueue | |
6370a6ad | 313 | * @flags: WQ_* flags (only WQ_FREEZEABLE and WQ_MEM_RECLAIM are meaningful) |
81dcaf65 TH |
314 | * |
315 | * Allocate an ordered workqueue. An ordered workqueue executes at | |
316 | * most one work item at any given time in the queued order. They are | |
317 | * implemented as unbound workqueues with @max_active of one. | |
318 | * | |
319 | * RETURNS: | |
320 | * Pointer to the allocated workqueue on success, %NULL on failure. | |
321 | */ | |
322 | static inline struct workqueue_struct * | |
323 | alloc_ordered_workqueue(const char *name, unsigned int flags) | |
324 | { | |
325 | return alloc_workqueue(name, WQ_UNBOUND | flags, 1); | |
326 | } | |
327 | ||
97e37d7b | 328 | #define create_workqueue(name) \ |
6370a6ad | 329 | alloc_workqueue((name), WQ_MEM_RECLAIM, 1) |
97e37d7b | 330 | #define create_freezeable_workqueue(name) \ |
6370a6ad | 331 | alloc_workqueue((name), WQ_FREEZEABLE | WQ_UNBOUND | WQ_MEM_RECLAIM, 1) |
97e37d7b | 332 | #define create_singlethread_workqueue(name) \ |
6370a6ad | 333 | alloc_workqueue((name), WQ_UNBOUND | WQ_MEM_RECLAIM, 1) |
1da177e4 LT |
334 | |
335 | extern void destroy_workqueue(struct workqueue_struct *wq); | |
336 | ||
b3c97528 | 337 | extern int queue_work(struct workqueue_struct *wq, struct work_struct *work); |
c1a220e7 ZR |
338 | extern int queue_work_on(int cpu, struct workqueue_struct *wq, |
339 | struct work_struct *work); | |
b3c97528 HH |
340 | extern int queue_delayed_work(struct workqueue_struct *wq, |
341 | struct delayed_work *work, unsigned long delay); | |
7a6bc1cd | 342 | extern int queue_delayed_work_on(int cpu, struct workqueue_struct *wq, |
28e53bdd ON |
343 | struct delayed_work *work, unsigned long delay); |
344 | ||
b3c97528 | 345 | extern void flush_workqueue(struct workqueue_struct *wq); |
28e53bdd | 346 | extern void flush_scheduled_work(void); |
1da177e4 | 347 | |
b3c97528 | 348 | extern int schedule_work(struct work_struct *work); |
c1a220e7 | 349 | extern int schedule_work_on(int cpu, struct work_struct *work); |
b3c97528 | 350 | extern int schedule_delayed_work(struct delayed_work *work, unsigned long delay); |
28e53bdd ON |
351 | extern int schedule_delayed_work_on(int cpu, struct delayed_work *work, |
352 | unsigned long delay); | |
65f27f38 | 353 | extern int schedule_on_each_cpu(work_func_t func); |
1da177e4 LT |
354 | extern int keventd_up(void); |
355 | ||
65f27f38 | 356 | int execute_in_process_context(work_func_t fn, struct execute_work *); |
1da177e4 | 357 | |
401a8d04 | 358 | extern bool flush_work(struct work_struct *work); |
09383498 | 359 | extern bool flush_work_sync(struct work_struct *work); |
401a8d04 TH |
360 | extern bool cancel_work_sync(struct work_struct *work); |
361 | ||
362 | extern bool flush_delayed_work(struct delayed_work *dwork); | |
09383498 | 363 | extern bool flush_delayed_work_sync(struct delayed_work *work); |
401a8d04 | 364 | extern bool cancel_delayed_work_sync(struct delayed_work *dwork); |
28e53bdd | 365 | |
dcd989cb TH |
366 | extern void workqueue_set_max_active(struct workqueue_struct *wq, |
367 | int max_active); | |
368 | extern bool workqueue_congested(unsigned int cpu, struct workqueue_struct *wq); | |
369 | extern unsigned int work_cpu(struct work_struct *work); | |
370 | extern unsigned int work_busy(struct work_struct *work); | |
371 | ||
1da177e4 LT |
372 | /* |
373 | * Kill off a pending schedule_delayed_work(). Note that the work callback | |
071b6386 ON |
374 | * function may still be running on return from cancel_delayed_work(), unless |
375 | * it returns 1 and the work doesn't re-arm itself. Run flush_workqueue() or | |
28e53bdd | 376 | * cancel_work_sync() to wait on it. |
1da177e4 | 377 | */ |
401a8d04 | 378 | static inline bool cancel_delayed_work(struct delayed_work *work) |
1da177e4 | 379 | { |
401a8d04 | 380 | bool ret; |
1da177e4 | 381 | |
223a10a9 | 382 | ret = del_timer_sync(&work->timer); |
1da177e4 | 383 | if (ret) |
23b2e599 | 384 | work_clear_pending(&work->work); |
1da177e4 LT |
385 | return ret; |
386 | } | |
387 | ||
4e49627b ON |
388 | /* |
389 | * Like above, but uses del_timer() instead of del_timer_sync(). This means, | |
390 | * if it returns 0 the timer function may be running and the queueing is in | |
391 | * progress. | |
392 | */ | |
401a8d04 | 393 | static inline bool __cancel_delayed_work(struct delayed_work *work) |
4e49627b | 394 | { |
401a8d04 | 395 | bool ret; |
4e49627b ON |
396 | |
397 | ret = del_timer(&work->timer); | |
398 | if (ret) | |
399 | work_clear_pending(&work->work); | |
400 | return ret; | |
401 | } | |
402 | ||
f5a421a4 | 403 | /* Obsolete. use cancel_delayed_work_sync() */ |
1634c48f ON |
404 | static inline |
405 | void cancel_rearming_delayed_workqueue(struct workqueue_struct *wq, | |
406 | struct delayed_work *work) | |
407 | { | |
f5a421a4 ON |
408 | cancel_delayed_work_sync(work); |
409 | } | |
410 | ||
411 | /* Obsolete. use cancel_delayed_work_sync() */ | |
412 | static inline | |
413 | void cancel_rearming_delayed_work(struct delayed_work *work) | |
414 | { | |
415 | cancel_delayed_work_sync(work); | |
1634c48f ON |
416 | } |
417 | ||
2d3854a3 RR |
418 | #ifndef CONFIG_SMP |
419 | static inline long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg) | |
420 | { | |
421 | return fn(arg); | |
422 | } | |
423 | #else | |
424 | long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg); | |
425 | #endif /* CONFIG_SMP */ | |
a25909a4 | 426 | |
a0a1a5fd TH |
427 | #ifdef CONFIG_FREEZER |
428 | extern void freeze_workqueues_begin(void); | |
429 | extern bool freeze_workqueues_busy(void); | |
430 | extern void thaw_workqueues(void); | |
431 | #endif /* CONFIG_FREEZER */ | |
432 | ||
1da177e4 | 433 | #endif |