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Commit | Line | Data |
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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> |
60063497 | 13 | #include <linux/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); | |
d8e794df | 19 | void delayed_work_timer_fn(unsigned long __data); |
6bb49e59 | 20 | |
a08727ba LT |
21 | /* |
22 | * The first word is the work queue pointer and the flags rolled into | |
23 | * one | |
24 | */ | |
25 | #define work_data_bits(work) ((unsigned long *)(&(work)->data)) | |
26 | ||
22df02bb TH |
27 | enum { |
28 | WORK_STRUCT_PENDING_BIT = 0, /* work item is pending execution */ | |
8a2e8e5d TH |
29 | WORK_STRUCT_DELAYED_BIT = 1, /* work item is delayed */ |
30 | WORK_STRUCT_CWQ_BIT = 2, /* data points to cwq */ | |
31 | WORK_STRUCT_LINKED_BIT = 3, /* next work is linked to this one */ | |
22df02bb | 32 | #ifdef CONFIG_DEBUG_OBJECTS_WORK |
8a2e8e5d TH |
33 | WORK_STRUCT_STATIC_BIT = 4, /* static initializer (debugobjects) */ |
34 | WORK_STRUCT_COLOR_SHIFT = 5, /* color for workqueue flushing */ | |
0f900049 | 35 | #else |
8a2e8e5d | 36 | WORK_STRUCT_COLOR_SHIFT = 4, /* color for workqueue flushing */ |
22df02bb TH |
37 | #endif |
38 | ||
73f53c4a TH |
39 | WORK_STRUCT_COLOR_BITS = 4, |
40 | ||
22df02bb | 41 | WORK_STRUCT_PENDING = 1 << WORK_STRUCT_PENDING_BIT, |
8a2e8e5d | 42 | WORK_STRUCT_DELAYED = 1 << WORK_STRUCT_DELAYED_BIT, |
e120153d | 43 | WORK_STRUCT_CWQ = 1 << WORK_STRUCT_CWQ_BIT, |
affee4b2 | 44 | WORK_STRUCT_LINKED = 1 << WORK_STRUCT_LINKED_BIT, |
22df02bb TH |
45 | #ifdef CONFIG_DEBUG_OBJECTS_WORK |
46 | WORK_STRUCT_STATIC = 1 << WORK_STRUCT_STATIC_BIT, | |
47 | #else | |
48 | WORK_STRUCT_STATIC = 0, | |
49 | #endif | |
50 | ||
73f53c4a TH |
51 | /* |
52 | * The last color is no color used for works which don't | |
53 | * participate in workqueue flushing. | |
54 | */ | |
55 | WORK_NR_COLORS = (1 << WORK_STRUCT_COLOR_BITS) - 1, | |
56 | WORK_NO_COLOR = WORK_NR_COLORS, | |
57 | ||
bdbc5dd7 | 58 | /* special cpu IDs */ |
f3421797 | 59 | WORK_CPU_UNBOUND = NR_CPUS, |
6be19588 | 60 | WORK_CPU_END = NR_CPUS + 1, |
bdbc5dd7 | 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 | ||
b5490077 TH |
70 | /* data contains off-queue information when !WORK_STRUCT_CWQ */ |
71 | WORK_OFFQ_FLAG_BASE = WORK_STRUCT_FLAG_BITS, | |
bbb68dfa TH |
72 | |
73 | WORK_OFFQ_CANCELING = (1 << WORK_OFFQ_FLAG_BASE), | |
74 | ||
715b06b8 TH |
75 | /* |
76 | * When a work item is off queue, its high bits point to the last | |
7c3eed5c TH |
77 | * pool it was on. Cap at 31 bits and use the highest number to |
78 | * indicate that no pool is associated. | |
715b06b8 | 79 | */ |
bbb68dfa | 80 | WORK_OFFQ_FLAG_BITS = 1, |
7c3eed5c TH |
81 | WORK_OFFQ_POOL_SHIFT = WORK_OFFQ_FLAG_BASE + WORK_OFFQ_FLAG_BITS, |
82 | WORK_OFFQ_LEFT = BITS_PER_LONG - WORK_OFFQ_POOL_SHIFT, | |
83 | WORK_OFFQ_POOL_BITS = WORK_OFFQ_LEFT <= 31 ? WORK_OFFQ_LEFT : 31, | |
84 | WORK_OFFQ_POOL_NONE = (1LU << WORK_OFFQ_POOL_BITS) - 1, | |
b5490077 TH |
85 | |
86 | /* convenience constants */ | |
0f900049 | 87 | WORK_STRUCT_FLAG_MASK = (1UL << WORK_STRUCT_FLAG_BITS) - 1, |
22df02bb | 88 | WORK_STRUCT_WQ_DATA_MASK = ~WORK_STRUCT_FLAG_MASK, |
7c3eed5c | 89 | WORK_STRUCT_NO_POOL = (unsigned long)WORK_OFFQ_POOL_NONE << WORK_OFFQ_POOL_SHIFT, |
dcd989cb TH |
90 | |
91 | /* bit mask for work_busy() return values */ | |
92 | WORK_BUSY_PENDING = 1 << 0, | |
93 | WORK_BUSY_RUNNING = 1 << 1, | |
22df02bb TH |
94 | }; |
95 | ||
1da177e4 | 96 | struct work_struct { |
a08727ba | 97 | atomic_long_t data; |
1da177e4 | 98 | struct list_head entry; |
6bb49e59 | 99 | work_func_t func; |
4e6045f1 JB |
100 | #ifdef CONFIG_LOCKDEP |
101 | struct lockdep_map lockdep_map; | |
102 | #endif | |
52bad64d DH |
103 | }; |
104 | ||
7c3eed5c | 105 | #define WORK_DATA_INIT() ATOMIC_LONG_INIT(WORK_STRUCT_NO_POOL) |
7a22ad75 | 106 | #define WORK_DATA_STATIC_INIT() \ |
7c3eed5c | 107 | ATOMIC_LONG_INIT(WORK_STRUCT_NO_POOL | WORK_STRUCT_STATIC) |
a08727ba | 108 | |
52bad64d DH |
109 | struct delayed_work { |
110 | struct work_struct work; | |
1da177e4 | 111 | struct timer_list timer; |
1265057f | 112 | int cpu; |
1da177e4 LT |
113 | }; |
114 | ||
bf6aede7 JD |
115 | static inline struct delayed_work *to_delayed_work(struct work_struct *work) |
116 | { | |
117 | return container_of(work, struct delayed_work, work); | |
118 | } | |
119 | ||
1fa44eca JB |
120 | struct execute_work { |
121 | struct work_struct work; | |
122 | }; | |
123 | ||
4e6045f1 JB |
124 | #ifdef CONFIG_LOCKDEP |
125 | /* | |
126 | * NB: because we have to copy the lockdep_map, setting _key | |
127 | * here is required, otherwise it could get initialised to the | |
128 | * copy of the lockdep_map! | |
129 | */ | |
130 | #define __WORK_INIT_LOCKDEP_MAP(n, k) \ | |
131 | .lockdep_map = STATIC_LOCKDEP_MAP_INIT(n, k), | |
132 | #else | |
133 | #define __WORK_INIT_LOCKDEP_MAP(n, k) | |
134 | #endif | |
135 | ||
ee64e7f6 TH |
136 | #define __WORK_INITIALIZER(n, f) { \ |
137 | .data = WORK_DATA_STATIC_INIT(), \ | |
138 | .entry = { &(n).entry, &(n).entry }, \ | |
139 | .func = (f), \ | |
140 | __WORK_INIT_LOCKDEP_MAP(#n, &(n)) \ | |
65f27f38 DH |
141 | } |
142 | ||
f991b318 | 143 | #define __DELAYED_WORK_INITIALIZER(n, f, tflags) { \ |
ee64e7f6 | 144 | .work = __WORK_INITIALIZER((n).work, (f)), \ |
f991b318 | 145 | .timer = __TIMER_INITIALIZER(delayed_work_timer_fn, \ |
e0aecdd8 TH |
146 | 0, (unsigned long)&(n), \ |
147 | (tflags) | TIMER_IRQSAFE), \ | |
dd6414b5 PC |
148 | } |
149 | ||
ee64e7f6 | 150 | #define DECLARE_WORK(n, f) \ |
65f27f38 DH |
151 | struct work_struct n = __WORK_INITIALIZER(n, f) |
152 | ||
ee64e7f6 | 153 | #define DECLARE_DELAYED_WORK(n, f) \ |
f991b318 | 154 | struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f, 0) |
65f27f38 | 155 | |
203b42f7 | 156 | #define DECLARE_DEFERRABLE_WORK(n, f) \ |
f991b318 | 157 | struct delayed_work n = __DELAYED_WORK_INITIALIZER(n, f, TIMER_DEFERRABLE) |
dd6414b5 | 158 | |
1da177e4 | 159 | /* |
65f27f38 | 160 | * initialize a work item's function pointer |
1da177e4 | 161 | */ |
ee64e7f6 TH |
162 | #define PREPARE_WORK(_work, _func) \ |
163 | do { \ | |
164 | (_work)->func = (_func); \ | |
1da177e4 LT |
165 | } while (0) |
166 | ||
ee64e7f6 | 167 | #define PREPARE_DELAYED_WORK(_work, _func) \ |
65f27f38 | 168 | PREPARE_WORK(&(_work)->work, (_func)) |
52bad64d | 169 | |
dc186ad7 TG |
170 | #ifdef CONFIG_DEBUG_OBJECTS_WORK |
171 | extern void __init_work(struct work_struct *work, int onstack); | |
172 | extern void destroy_work_on_stack(struct work_struct *work); | |
4690c4ab TH |
173 | static inline unsigned int work_static(struct work_struct *work) |
174 | { | |
22df02bb | 175 | return *work_data_bits(work) & WORK_STRUCT_STATIC; |
4690c4ab | 176 | } |
dc186ad7 TG |
177 | #else |
178 | static inline void __init_work(struct work_struct *work, int onstack) { } | |
179 | static inline void destroy_work_on_stack(struct work_struct *work) { } | |
4690c4ab | 180 | static inline unsigned int work_static(struct work_struct *work) { return 0; } |
dc186ad7 TG |
181 | #endif |
182 | ||
1da177e4 | 183 | /* |
52bad64d | 184 | * initialize all of a work item in one go |
a08727ba | 185 | * |
b9049df5 | 186 | * NOTE! No point in using "atomic_long_set()": using a direct |
a08727ba LT |
187 | * assignment of the work data initializer allows the compiler |
188 | * to generate better code. | |
1da177e4 | 189 | */ |
4e6045f1 | 190 | #ifdef CONFIG_LOCKDEP |
dc186ad7 | 191 | #define __INIT_WORK(_work, _func, _onstack) \ |
65f27f38 | 192 | do { \ |
4e6045f1 JB |
193 | static struct lock_class_key __key; \ |
194 | \ | |
dc186ad7 | 195 | __init_work((_work), _onstack); \ |
23b2e599 | 196 | (_work)->data = (atomic_long_t) WORK_DATA_INIT(); \ |
ee64e7f6 | 197 | lockdep_init_map(&(_work)->lockdep_map, #_work, &__key, 0); \ |
65f27f38 DH |
198 | INIT_LIST_HEAD(&(_work)->entry); \ |
199 | PREPARE_WORK((_work), (_func)); \ | |
200 | } while (0) | |
4e6045f1 | 201 | #else |
dc186ad7 | 202 | #define __INIT_WORK(_work, _func, _onstack) \ |
4e6045f1 | 203 | do { \ |
dc186ad7 | 204 | __init_work((_work), _onstack); \ |
4e6045f1 JB |
205 | (_work)->data = (atomic_long_t) WORK_DATA_INIT(); \ |
206 | INIT_LIST_HEAD(&(_work)->entry); \ | |
207 | PREPARE_WORK((_work), (_func)); \ | |
208 | } while (0) | |
209 | #endif | |
65f27f38 | 210 | |
ee64e7f6 TH |
211 | #define INIT_WORK(_work, _func) \ |
212 | do { \ | |
213 | __INIT_WORK((_work), (_func), 0); \ | |
dc186ad7 TG |
214 | } while (0) |
215 | ||
ee64e7f6 TH |
216 | #define INIT_WORK_ONSTACK(_work, _func) \ |
217 | do { \ | |
218 | __INIT_WORK((_work), (_func), 1); \ | |
dc186ad7 TG |
219 | } while (0) |
220 | ||
f991b318 | 221 | #define __INIT_DELAYED_WORK(_work, _func, _tflags) \ |
ee64e7f6 TH |
222 | do { \ |
223 | INIT_WORK(&(_work)->work, (_func)); \ | |
f991b318 | 224 | __setup_timer(&(_work)->timer, delayed_work_timer_fn, \ |
e0aecdd8 TH |
225 | (unsigned long)(_work), \ |
226 | (_tflags) | TIMER_IRQSAFE); \ | |
52bad64d DH |
227 | } while (0) |
228 | ||
f991b318 | 229 | #define __INIT_DELAYED_WORK_ONSTACK(_work, _func, _tflags) \ |
ee64e7f6 TH |
230 | do { \ |
231 | INIT_WORK_ONSTACK(&(_work)->work, (_func)); \ | |
f991b318 TH |
232 | __setup_timer_on_stack(&(_work)->timer, \ |
233 | delayed_work_timer_fn, \ | |
234 | (unsigned long)(_work), \ | |
e0aecdd8 | 235 | (_tflags) | TIMER_IRQSAFE); \ |
6d612b0f PZ |
236 | } while (0) |
237 | ||
f991b318 TH |
238 | #define INIT_DELAYED_WORK(_work, _func) \ |
239 | __INIT_DELAYED_WORK(_work, _func, 0) | |
240 | ||
241 | #define INIT_DELAYED_WORK_ONSTACK(_work, _func) \ | |
242 | __INIT_DELAYED_WORK_ONSTACK(_work, _func, 0) | |
243 | ||
203b42f7 | 244 | #define INIT_DEFERRABLE_WORK(_work, _func) \ |
f991b318 TH |
245 | __INIT_DELAYED_WORK(_work, _func, TIMER_DEFERRABLE) |
246 | ||
247 | #define INIT_DEFERRABLE_WORK_ONSTACK(_work, _func) \ | |
248 | __INIT_DELAYED_WORK_ONSTACK(_work, _func, TIMER_DEFERRABLE) | |
28287033 | 249 | |
365970a1 DH |
250 | /** |
251 | * work_pending - Find out whether a work item is currently pending | |
252 | * @work: The work item in question | |
253 | */ | |
254 | #define work_pending(work) \ | |
22df02bb | 255 | test_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work)) |
365970a1 DH |
256 | |
257 | /** | |
258 | * delayed_work_pending - Find out whether a delayable work item is currently | |
259 | * pending | |
260 | * @work: The work item in question | |
261 | */ | |
0221872a LT |
262 | #define delayed_work_pending(w) \ |
263 | work_pending(&(w)->work) | |
365970a1 | 264 | |
65f27f38 | 265 | /** |
23b2e599 ON |
266 | * work_clear_pending - for internal use only, mark a work item as not pending |
267 | * @work: The work item in question | |
65f27f38 | 268 | */ |
23b2e599 | 269 | #define work_clear_pending(work) \ |
22df02bb | 270 | clear_bit(WORK_STRUCT_PENDING_BIT, work_data_bits(work)) |
65f27f38 | 271 | |
c54fce6e TH |
272 | /* |
273 | * Workqueue flags and constants. For details, please refer to | |
274 | * Documentation/workqueue.txt. | |
275 | */ | |
97e37d7b | 276 | enum { |
bdbc5dd7 | 277 | WQ_NON_REENTRANT = 1 << 0, /* guarantee non-reentrance */ |
c7fc77f7 | 278 | WQ_UNBOUND = 1 << 1, /* not bound to any cpu */ |
58a69cb4 | 279 | WQ_FREEZABLE = 1 << 2, /* freeze during suspend */ |
6370a6ad | 280 | WQ_MEM_RECLAIM = 1 << 3, /* may be used for memory reclaim */ |
649027d7 | 281 | WQ_HIGHPRI = 1 << 4, /* high priority */ |
fb0e7beb | 282 | WQ_CPU_INTENSIVE = 1 << 5, /* cpu instensive workqueue */ |
b71ab8c2 | 283 | |
9c5a2ba7 | 284 | WQ_DRAINING = 1 << 6, /* internal: workqueue is draining */ |
6370a6ad | 285 | WQ_RESCUER = 1 << 7, /* internal: workqueue has rescuer */ |
e41e704b | 286 | |
b71ab8c2 | 287 | WQ_MAX_ACTIVE = 512, /* I like 512, better ideas? */ |
f3421797 | 288 | WQ_MAX_UNBOUND_PER_CPU = 4, /* 4 * #cpus for unbound wq */ |
b71ab8c2 | 289 | WQ_DFL_ACTIVE = WQ_MAX_ACTIVE / 2, |
97e37d7b | 290 | }; |
52bad64d | 291 | |
f3421797 TH |
292 | /* unbound wq's aren't per-cpu, scale max_active according to #cpus */ |
293 | #define WQ_UNBOUND_MAX_ACTIVE \ | |
294 | max_t(int, WQ_MAX_ACTIVE, num_possible_cpus() * WQ_MAX_UNBOUND_PER_CPU) | |
65f27f38 | 295 | |
d320c038 TH |
296 | /* |
297 | * System-wide workqueues which are always present. | |
298 | * | |
299 | * system_wq is the one used by schedule[_delayed]_work[_on](). | |
300 | * Multi-CPU multi-threaded. There are users which expect relatively | |
301 | * short queue flush time. Don't queue works which can run for too | |
302 | * long. | |
303 | * | |
304 | * system_long_wq is similar to system_wq but may host long running | |
305 | * works. Queue flushing might take relatively long. | |
306 | * | |
f3421797 TH |
307 | * system_unbound_wq is unbound workqueue. Workers are not bound to |
308 | * any specific CPU, not concurrency managed, and all queued works are | |
309 | * executed immediately as long as max_active limit is not reached and | |
310 | * resources are available. | |
4149efb2 | 311 | * |
24d51add TH |
312 | * system_freezable_wq is equivalent to system_wq except that it's |
313 | * freezable. | |
d320c038 TH |
314 | */ |
315 | extern struct workqueue_struct *system_wq; | |
316 | extern struct workqueue_struct *system_long_wq; | |
f3421797 | 317 | extern struct workqueue_struct *system_unbound_wq; |
24d51add | 318 | extern struct workqueue_struct *system_freezable_wq; |
ae930e0f | 319 | |
3b07e9ca | 320 | static inline struct workqueue_struct * __deprecated __system_nrt_wq(void) |
ae930e0f TH |
321 | { |
322 | return system_wq; | |
323 | } | |
324 | ||
3b07e9ca | 325 | static inline struct workqueue_struct * __deprecated __system_nrt_freezable_wq(void) |
ae930e0f TH |
326 | { |
327 | return system_freezable_wq; | |
328 | } | |
329 | ||
330 | /* equivlalent to system_wq and system_freezable_wq, deprecated */ | |
331 | #define system_nrt_wq __system_nrt_wq() | |
332 | #define system_nrt_freezable_wq __system_nrt_freezable_wq() | |
52bad64d | 333 | |
4e6045f1 | 334 | extern struct workqueue_struct * |
b196be89 TH |
335 | __alloc_workqueue_key(const char *fmt, unsigned int flags, int max_active, |
336 | struct lock_class_key *key, const char *lock_name, ...) __printf(1, 6); | |
4e6045f1 | 337 | |
b196be89 TH |
338 | /** |
339 | * alloc_workqueue - allocate a workqueue | |
340 | * @fmt: printf format for the name of the workqueue | |
341 | * @flags: WQ_* flags | |
342 | * @max_active: max in-flight work items, 0 for default | |
343 | * @args: args for @fmt | |
344 | * | |
345 | * Allocate a workqueue with the specified parameters. For detailed | |
346 | * information on WQ_* flags, please refer to Documentation/workqueue.txt. | |
347 | * | |
348 | * The __lock_name macro dance is to guarantee that single lock_class_key | |
349 | * doesn't end up with different namesm, which isn't allowed by lockdep. | |
350 | * | |
351 | * RETURNS: | |
352 | * Pointer to the allocated workqueue on success, %NULL on failure. | |
353 | */ | |
4e6045f1 | 354 | #ifdef CONFIG_LOCKDEP |
ee64e7f6 TH |
355 | #define alloc_workqueue(fmt, flags, max_active, args...) \ |
356 | ({ \ | |
357 | static struct lock_class_key __key; \ | |
358 | const char *__lock_name; \ | |
359 | \ | |
360 | if (__builtin_constant_p(fmt)) \ | |
361 | __lock_name = (fmt); \ | |
362 | else \ | |
363 | __lock_name = #fmt; \ | |
364 | \ | |
365 | __alloc_workqueue_key((fmt), (flags), (max_active), \ | |
366 | &__key, __lock_name, ##args); \ | |
4e6045f1 JB |
367 | }) |
368 | #else | |
ee64e7f6 TH |
369 | #define alloc_workqueue(fmt, flags, max_active, args...) \ |
370 | __alloc_workqueue_key((fmt), (flags), (max_active), \ | |
b196be89 | 371 | NULL, NULL, ##args) |
4e6045f1 JB |
372 | #endif |
373 | ||
81dcaf65 TH |
374 | /** |
375 | * alloc_ordered_workqueue - allocate an ordered workqueue | |
b196be89 | 376 | * @fmt: printf format for the name of the workqueue |
58a69cb4 | 377 | * @flags: WQ_* flags (only WQ_FREEZABLE and WQ_MEM_RECLAIM are meaningful) |
b196be89 | 378 | * @args: args for @fmt |
81dcaf65 TH |
379 | * |
380 | * Allocate an ordered workqueue. An ordered workqueue executes at | |
381 | * most one work item at any given time in the queued order. They are | |
382 | * implemented as unbound workqueues with @max_active of one. | |
383 | * | |
384 | * RETURNS: | |
385 | * Pointer to the allocated workqueue on success, %NULL on failure. | |
386 | */ | |
ee64e7f6 | 387 | #define alloc_ordered_workqueue(fmt, flags, args...) \ |
b196be89 | 388 | alloc_workqueue(fmt, WQ_UNBOUND | (flags), 1, ##args) |
81dcaf65 | 389 | |
ee64e7f6 | 390 | #define create_workqueue(name) \ |
6370a6ad | 391 | alloc_workqueue((name), WQ_MEM_RECLAIM, 1) |
ee64e7f6 | 392 | #define create_freezable_workqueue(name) \ |
58a69cb4 | 393 | alloc_workqueue((name), WQ_FREEZABLE | WQ_UNBOUND | WQ_MEM_RECLAIM, 1) |
ee64e7f6 | 394 | #define create_singlethread_workqueue(name) \ |
6370a6ad | 395 | alloc_workqueue((name), WQ_UNBOUND | WQ_MEM_RECLAIM, 1) |
1da177e4 LT |
396 | |
397 | extern void destroy_workqueue(struct workqueue_struct *wq); | |
398 | ||
d4283e93 | 399 | extern bool queue_work_on(int cpu, struct workqueue_struct *wq, |
c1a220e7 | 400 | struct work_struct *work); |
d4283e93 TH |
401 | extern bool queue_work(struct workqueue_struct *wq, struct work_struct *work); |
402 | extern bool queue_delayed_work_on(int cpu, struct workqueue_struct *wq, | |
28e53bdd | 403 | struct delayed_work *work, unsigned long delay); |
d4283e93 | 404 | extern bool queue_delayed_work(struct workqueue_struct *wq, |
0a13c00e | 405 | struct delayed_work *work, unsigned long delay); |
8376fe22 TH |
406 | extern bool mod_delayed_work_on(int cpu, struct workqueue_struct *wq, |
407 | struct delayed_work *dwork, unsigned long delay); | |
408 | extern bool mod_delayed_work(struct workqueue_struct *wq, | |
409 | struct delayed_work *dwork, unsigned long delay); | |
28e53bdd | 410 | |
b3c97528 | 411 | extern void flush_workqueue(struct workqueue_struct *wq); |
9c5a2ba7 | 412 | extern void drain_workqueue(struct workqueue_struct *wq); |
28e53bdd | 413 | extern void flush_scheduled_work(void); |
1da177e4 | 414 | |
d4283e93 TH |
415 | extern bool schedule_work_on(int cpu, struct work_struct *work); |
416 | extern bool schedule_work(struct work_struct *work); | |
417 | extern bool schedule_delayed_work_on(int cpu, struct delayed_work *work, | |
418 | unsigned long delay); | |
419 | extern bool schedule_delayed_work(struct delayed_work *work, | |
420 | unsigned long delay); | |
65f27f38 | 421 | extern int schedule_on_each_cpu(work_func_t func); |
1da177e4 LT |
422 | extern int keventd_up(void); |
423 | ||
65f27f38 | 424 | int execute_in_process_context(work_func_t fn, struct execute_work *); |
1da177e4 | 425 | |
401a8d04 TH |
426 | extern bool flush_work(struct work_struct *work); |
427 | extern bool cancel_work_sync(struct work_struct *work); | |
428 | ||
429 | extern bool flush_delayed_work(struct delayed_work *dwork); | |
57b30ae7 | 430 | extern bool cancel_delayed_work(struct delayed_work *dwork); |
401a8d04 | 431 | extern bool cancel_delayed_work_sync(struct delayed_work *dwork); |
28e53bdd | 432 | |
dcd989cb TH |
433 | extern void workqueue_set_max_active(struct workqueue_struct *wq, |
434 | int max_active); | |
435 | extern bool workqueue_congested(unsigned int cpu, struct workqueue_struct *wq); | |
dcd989cb TH |
436 | extern unsigned int work_busy(struct work_struct *work); |
437 | ||
4e49627b ON |
438 | /* |
439 | * Like above, but uses del_timer() instead of del_timer_sync(). This means, | |
440 | * if it returns 0 the timer function may be running and the queueing is in | |
441 | * progress. | |
442 | */ | |
136b5721 | 443 | static inline bool __deprecated __cancel_delayed_work(struct delayed_work *work) |
4e49627b | 444 | { |
401a8d04 | 445 | bool ret; |
4e49627b ON |
446 | |
447 | ret = del_timer(&work->timer); | |
448 | if (ret) | |
449 | work_clear_pending(&work->work); | |
450 | return ret; | |
451 | } | |
452 | ||
606a5020 | 453 | /* used to be different but now identical to flush_work(), deprecated */ |
43829731 | 454 | static inline bool __deprecated flush_work_sync(struct work_struct *work) |
606a5020 TH |
455 | { |
456 | return flush_work(work); | |
457 | } | |
458 | ||
459 | /* used to be different but now identical to flush_delayed_work(), deprecated */ | |
43829731 | 460 | static inline bool __deprecated flush_delayed_work_sync(struct delayed_work *dwork) |
606a5020 TH |
461 | { |
462 | return flush_delayed_work(dwork); | |
463 | } | |
464 | ||
2d3854a3 RR |
465 | #ifndef CONFIG_SMP |
466 | static inline long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg) | |
467 | { | |
468 | return fn(arg); | |
469 | } | |
470 | #else | |
471 | long work_on_cpu(unsigned int cpu, long (*fn)(void *), void *arg); | |
472 | #endif /* CONFIG_SMP */ | |
a25909a4 | 473 | |
a0a1a5fd TH |
474 | #ifdef CONFIG_FREEZER |
475 | extern void freeze_workqueues_begin(void); | |
476 | extern bool freeze_workqueues_busy(void); | |
477 | extern void thaw_workqueues(void); | |
478 | #endif /* CONFIG_FREEZER */ | |
479 | ||
1da177e4 | 480 | #endif |