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Commit | Line | Data |
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c0a31329 TG |
1 | /* |
2 | * include/linux/hrtimer.h | |
3 | * | |
4 | * hrtimers - High-resolution kernel timers | |
5 | * | |
6 | * Copyright(C) 2005, Thomas Gleixner <tglx@linutronix.de> | |
7 | * Copyright(C) 2005, Red Hat, Inc., Ingo Molnar | |
8 | * | |
9 | * data type definitions, declarations, prototypes | |
10 | * | |
11 | * Started by: Thomas Gleixner and Ingo Molnar | |
12 | * | |
13 | * For licencing details see kernel-base/COPYING | |
14 | */ | |
15 | #ifndef _LINUX_HRTIMER_H | |
16 | #define _LINUX_HRTIMER_H | |
17 | ||
18 | #include <linux/rbtree.h> | |
19 | #include <linux/ktime.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/list.h> | |
40b86062 | 22 | #include <linux/percpu.h> |
507e1231 | 23 | #include <linux/timer.h> |
998adc3d | 24 | #include <linux/timerqueue.h> |
c0a31329 | 25 | |
3c8aa39d TG |
26 | struct hrtimer_clock_base; |
27 | struct hrtimer_cpu_base; | |
28 | ||
c0a31329 TG |
29 | /* |
30 | * Mode arguments of xxx_hrtimer functions: | |
31 | */ | |
32 | enum hrtimer_mode { | |
597d0275 AB |
33 | HRTIMER_MODE_ABS = 0x0, /* Time value is absolute */ |
34 | HRTIMER_MODE_REL = 0x1, /* Time value is relative to now */ | |
35 | HRTIMER_MODE_PINNED = 0x02, /* Timer is bound to CPU */ | |
36 | HRTIMER_MODE_ABS_PINNED = 0x02, | |
37 | HRTIMER_MODE_REL_PINNED = 0x03, | |
c0a31329 TG |
38 | }; |
39 | ||
c9cb2e3d TG |
40 | /* |
41 | * Return values for the callback function | |
42 | */ | |
c0a31329 | 43 | enum hrtimer_restart { |
c9cb2e3d TG |
44 | HRTIMER_NORESTART, /* Timer is not restarted */ |
45 | HRTIMER_RESTART, /* Timer must be restarted */ | |
c0a31329 TG |
46 | }; |
47 | ||
54cdfdb4 TG |
48 | /* |
49 | * Values to track state of the timer | |
303e967f TG |
50 | * |
51 | * Possible states: | |
52 | * | |
53 | * 0x00 inactive | |
54 | * 0x01 enqueued into rbtree | |
54cdfdb4 | 55 | * |
887d9dc9 PZ |
56 | * The callback state is not part of the timer->state because clearing it would |
57 | * mean touching the timer after the callback, this makes it impossible to free | |
58 | * the timer from the callback function. | |
53370d2e | 59 | * |
887d9dc9 PZ |
60 | * Therefore we track the callback state in: |
61 | * | |
62 | * timer->base->cpu_base->running == timer | |
63 | * | |
64 | * On SMP it is possible to have a "callback function running and enqueued" | |
65 | * status. It happens for example when a posix timer expired and the callback | |
303e967f TG |
66 | * queued a signal. Between dropping the lock which protects the posix timer |
67 | * and reacquiring the base lock of the hrtimer, another CPU can deliver the | |
887d9dc9 | 68 | * signal and rearm the timer. |
303e967f TG |
69 | * |
70 | * All state transitions are protected by cpu_base->lock. | |
71 | */ | |
72 | #define HRTIMER_STATE_INACTIVE 0x00 | |
73 | #define HRTIMER_STATE_ENQUEUED 0x01 | |
303e967f | 74 | |
c0a31329 TG |
75 | /** |
76 | * struct hrtimer - the basic hrtimer structure | |
998adc3d JS |
77 | * @node: timerqueue node, which also manages node.expires, |
78 | * the absolute expiry time in the hrtimers internal | |
c0a31329 | 79 | * representation. The time is related to the clock on |
592aa999 TG |
80 | * which the timer is based. Is setup by adding |
81 | * slack to the _softexpires value. For non range timers | |
82 | * identical to _softexpires. | |
83 | * @_softexpires: the absolute earliest expiry time of the hrtimer. | |
84 | * The time which was given as expiry time when the timer | |
85 | * was armed. | |
c0a31329 | 86 | * @function: timer expiry callback function |
c0a31329 | 87 | * @base: pointer to the timer base (per cpu and per clock) |
303e967f | 88 | * @state: state information (See bit values above) |
203cbf77 | 89 | * @is_rel: Set if the timer was armed relative |
c0a31329 | 90 | * |
54cdfdb4 | 91 | * The hrtimer structure must be initialized by hrtimer_init() |
c0a31329 TG |
92 | */ |
93 | struct hrtimer { | |
998adc3d | 94 | struct timerqueue_node node; |
654c8e0b | 95 | ktime_t _softexpires; |
3c8aa39d TG |
96 | enum hrtimer_restart (*function)(struct hrtimer *); |
97 | struct hrtimer_clock_base *base; | |
203cbf77 TG |
98 | u8 state; |
99 | u8 is_rel; | |
c0a31329 TG |
100 | }; |
101 | ||
00362e33 TG |
102 | /** |
103 | * struct hrtimer_sleeper - simple sleeper structure | |
00362e33 TG |
104 | * @timer: embedded timer structure |
105 | * @task: task to wake up | |
106 | * | |
107 | * task is set to NULL, when the timer expires. | |
108 | */ | |
109 | struct hrtimer_sleeper { | |
110 | struct hrtimer timer; | |
111 | struct task_struct *task; | |
112 | }; | |
113 | ||
b8e38413 TG |
114 | #ifdef CONFIG_64BIT |
115 | # define HRTIMER_CLOCK_BASE_ALIGN 64 | |
116 | #else | |
117 | # define HRTIMER_CLOCK_BASE_ALIGN 32 | |
118 | #endif | |
119 | ||
c0a31329 | 120 | /** |
d1d67174 | 121 | * struct hrtimer_clock_base - the timer base for a specific clock |
05fb6bf0 | 122 | * @cpu_base: per cpu clock base |
3c8aa39d TG |
123 | * @index: clock type index for per_cpu support when moving a |
124 | * timer to a base on another cpu. | |
4d258b25 | 125 | * @clockid: clock id for per_cpu support |
92127c7a | 126 | * @active: red black tree root node for the active timers |
92127c7a | 127 | * @get_time: function to retrieve the current time of the clock |
54cdfdb4 | 128 | * @offset: offset of this clock to the monotonic base |
c0a31329 | 129 | */ |
3c8aa39d TG |
130 | struct hrtimer_clock_base { |
131 | struct hrtimer_cpu_base *cpu_base; | |
ab8177bc TG |
132 | int index; |
133 | clockid_t clockid; | |
998adc3d | 134 | struct timerqueue_head active; |
c0a31329 | 135 | ktime_t (*get_time)(void); |
54cdfdb4 | 136 | ktime_t offset; |
b8e38413 | 137 | } __attribute__((__aligned__(HRTIMER_CLOCK_BASE_ALIGN))); |
3c8aa39d | 138 | |
e06383db | 139 | enum hrtimer_base_type { |
e06383db | 140 | HRTIMER_BASE_MONOTONIC, |
68fa61c0 | 141 | HRTIMER_BASE_REALTIME, |
70a08cca | 142 | HRTIMER_BASE_BOOTTIME, |
90adda98 | 143 | HRTIMER_BASE_TAI, |
e06383db JS |
144 | HRTIMER_MAX_CLOCK_BASES, |
145 | }; | |
3c8aa39d TG |
146 | |
147 | /* | |
148 | * struct hrtimer_cpu_base - the per cpu clock bases | |
149 | * @lock: lock protecting the base and associated clock bases | |
150 | * and timers | |
887d9dc9 PZ |
151 | * @seq: seqcount around __run_hrtimer |
152 | * @running: pointer to the currently running hrtimer | |
cddd0248 | 153 | * @cpu: cpu number |
ab8177bc | 154 | * @active_bases: Bitfield to mark bases with active timers |
868a3e91 | 155 | * @clock_was_set_seq: Sequence counter of clock was set events |
bc7a34b8 | 156 | * @migration_enabled: The migration of hrtimers to other cpus is enabled |
683be13a | 157 | * @nohz_active: The nohz functionality is enabled |
54cdfdb4 TG |
158 | * @expires_next: absolute time of the next event which was scheduled |
159 | * via clock_set_next_event() | |
895bdfa7 | 160 | * @next_timer: Pointer to the first expiring timer |
9bc74919 | 161 | * @in_hrtirq: hrtimer_interrupt() is currently executing |
54cdfdb4 | 162 | * @hres_active: State of high resolution mode |
41d2e494 TG |
163 | * @hang_detected: The last hrtimer interrupt detected a hang |
164 | * @nr_events: Total number of hrtimer interrupt events | |
165 | * @nr_retries: Total number of hrtimer interrupt retries | |
166 | * @nr_hangs: Total number of hrtimer interrupt hangs | |
167 | * @max_hang_time: Maximum time spent in hrtimer_interrupt | |
ab8177bc | 168 | * @clock_base: array of clock bases for this cpu |
895bdfa7 TG |
169 | * |
170 | * Note: next_timer is just an optimization for __remove_hrtimer(). | |
171 | * Do not dereference the pointer because it is not reliable on | |
172 | * cross cpu removals. | |
3c8aa39d TG |
173 | */ |
174 | struct hrtimer_cpu_base { | |
ecb49d1a | 175 | raw_spinlock_t lock; |
887d9dc9 PZ |
176 | seqcount_t seq; |
177 | struct hrtimer *running; | |
cddd0248 | 178 | unsigned int cpu; |
f55a6faa | 179 | unsigned int active_bases; |
868a3e91 | 180 | unsigned int clock_was_set_seq; |
bc7a34b8 | 181 | bool migration_enabled; |
683be13a | 182 | bool nohz_active; |
54cdfdb4 | 183 | #ifdef CONFIG_HIGH_RES_TIMERS |
e19ffe8b TG |
184 | unsigned int in_hrtirq : 1, |
185 | hres_active : 1, | |
186 | hang_detected : 1; | |
54cdfdb4 | 187 | ktime_t expires_next; |
895bdfa7 | 188 | struct hrtimer *next_timer; |
a6ffebce TG |
189 | unsigned int nr_events; |
190 | unsigned int nr_retries; | |
191 | unsigned int nr_hangs; | |
192 | unsigned int max_hang_time; | |
54cdfdb4 | 193 | #endif |
f24444b0 | 194 | struct hrtimer_clock_base clock_base[HRTIMER_MAX_CLOCK_BASES]; |
6d9a1411 | 195 | } ____cacheline_aligned; |
c0a31329 | 196 | |
63ca243b AV |
197 | static inline void hrtimer_set_expires(struct hrtimer *timer, ktime_t time) |
198 | { | |
b8e38413 TG |
199 | BUILD_BUG_ON(sizeof(struct hrtimer_clock_base) > HRTIMER_CLOCK_BASE_ALIGN); |
200 | ||
998adc3d | 201 | timer->node.expires = time; |
654c8e0b | 202 | timer->_softexpires = time; |
63ca243b | 203 | } |
654c8e0b AV |
204 | |
205 | static inline void hrtimer_set_expires_range(struct hrtimer *timer, ktime_t time, ktime_t delta) | |
206 | { | |
207 | timer->_softexpires = time; | |
998adc3d | 208 | timer->node.expires = ktime_add_safe(time, delta); |
654c8e0b AV |
209 | } |
210 | ||
da8b44d5 | 211 | static inline void hrtimer_set_expires_range_ns(struct hrtimer *timer, ktime_t time, u64 delta) |
654c8e0b AV |
212 | { |
213 | timer->_softexpires = time; | |
998adc3d | 214 | timer->node.expires = ktime_add_safe(time, ns_to_ktime(delta)); |
654c8e0b AV |
215 | } |
216 | ||
63ca243b AV |
217 | static inline void hrtimer_set_expires_tv64(struct hrtimer *timer, s64 tv64) |
218 | { | |
2456e855 TG |
219 | timer->node.expires = tv64; |
220 | timer->_softexpires = tv64; | |
63ca243b AV |
221 | } |
222 | ||
223 | static inline void hrtimer_add_expires(struct hrtimer *timer, ktime_t time) | |
224 | { | |
998adc3d | 225 | timer->node.expires = ktime_add_safe(timer->node.expires, time); |
654c8e0b | 226 | timer->_softexpires = ktime_add_safe(timer->_softexpires, time); |
63ca243b AV |
227 | } |
228 | ||
7597bc94 | 229 | static inline void hrtimer_add_expires_ns(struct hrtimer *timer, u64 ns) |
63ca243b | 230 | { |
998adc3d | 231 | timer->node.expires = ktime_add_ns(timer->node.expires, ns); |
654c8e0b | 232 | timer->_softexpires = ktime_add_ns(timer->_softexpires, ns); |
63ca243b AV |
233 | } |
234 | ||
235 | static inline ktime_t hrtimer_get_expires(const struct hrtimer *timer) | |
236 | { | |
998adc3d | 237 | return timer->node.expires; |
63ca243b AV |
238 | } |
239 | ||
654c8e0b AV |
240 | static inline ktime_t hrtimer_get_softexpires(const struct hrtimer *timer) |
241 | { | |
242 | return timer->_softexpires; | |
243 | } | |
244 | ||
63ca243b AV |
245 | static inline s64 hrtimer_get_expires_tv64(const struct hrtimer *timer) |
246 | { | |
2456e855 | 247 | return timer->node.expires; |
63ca243b | 248 | } |
654c8e0b AV |
249 | static inline s64 hrtimer_get_softexpires_tv64(const struct hrtimer *timer) |
250 | { | |
2456e855 | 251 | return timer->_softexpires; |
654c8e0b | 252 | } |
63ca243b AV |
253 | |
254 | static inline s64 hrtimer_get_expires_ns(const struct hrtimer *timer) | |
255 | { | |
998adc3d | 256 | return ktime_to_ns(timer->node.expires); |
63ca243b AV |
257 | } |
258 | ||
259 | static inline ktime_t hrtimer_expires_remaining(const struct hrtimer *timer) | |
260 | { | |
998adc3d | 261 | return ktime_sub(timer->node.expires, timer->base->get_time()); |
63ca243b AV |
262 | } |
263 | ||
54cdfdb4 TG |
264 | static inline ktime_t hrtimer_cb_get_time(struct hrtimer *timer) |
265 | { | |
266 | return timer->base->get_time(); | |
267 | } | |
268 | ||
21d6d52a TG |
269 | #ifdef CONFIG_HIGH_RES_TIMERS |
270 | struct clock_event_device; | |
271 | ||
272 | extern void hrtimer_interrupt(struct clock_event_device *dev); | |
273 | ||
8f4d37ec PZ |
274 | static inline int hrtimer_is_hres_active(struct hrtimer *timer) |
275 | { | |
276 | return timer->base->cpu_base->hres_active; | |
277 | } | |
278 | ||
54cdfdb4 TG |
279 | /* |
280 | * The resolution of the clocks. The resolution value is returned in | |
281 | * the clock_getres() system call to give application programmers an | |
282 | * idea of the (in)accuracy of timers. Timer values are rounded up to | |
283 | * this resolution values. | |
284 | */ | |
151db1fc | 285 | # define HIGH_RES_NSEC 1 |
2456e855 | 286 | # define KTIME_HIGH_RES (HIGH_RES_NSEC) |
151db1fc | 287 | # define MONOTONIC_RES_NSEC HIGH_RES_NSEC |
54cdfdb4 TG |
288 | # define KTIME_MONOTONIC_RES KTIME_HIGH_RES |
289 | ||
f55a6faa JS |
290 | extern void clock_was_set_delayed(void); |
291 | ||
398ca17f TG |
292 | extern unsigned int hrtimer_resolution; |
293 | ||
54cdfdb4 TG |
294 | #else |
295 | ||
151db1fc | 296 | # define MONOTONIC_RES_NSEC LOW_RES_NSEC |
54cdfdb4 TG |
297 | # define KTIME_MONOTONIC_RES KTIME_LOW_RES |
298 | ||
d711b8b3 | 299 | #define hrtimer_resolution (unsigned int)LOW_RES_NSEC |
398ca17f | 300 | |
8f4d37ec PZ |
301 | static inline int hrtimer_is_hres_active(struct hrtimer *timer) |
302 | { | |
303 | return 0; | |
304 | } | |
f55a6faa JS |
305 | |
306 | static inline void clock_was_set_delayed(void) { } | |
307 | ||
54cdfdb4 TG |
308 | #endif |
309 | ||
203cbf77 TG |
310 | static inline ktime_t |
311 | __hrtimer_expires_remaining_adjusted(const struct hrtimer *timer, ktime_t now) | |
312 | { | |
313 | ktime_t rem = ktime_sub(timer->node.expires, now); | |
314 | ||
315 | /* | |
316 | * Adjust relative timers for the extra we added in | |
317 | * hrtimer_start_range_ns() to prevent short timeouts. | |
318 | */ | |
319 | if (IS_ENABLED(CONFIG_TIME_LOW_RES) && timer->is_rel) | |
2456e855 | 320 | rem -= hrtimer_resolution; |
203cbf77 TG |
321 | return rem; |
322 | } | |
323 | ||
324 | static inline ktime_t | |
325 | hrtimer_expires_remaining_adjusted(const struct hrtimer *timer) | |
326 | { | |
327 | return __hrtimer_expires_remaining_adjusted(timer, | |
328 | timer->base->get_time()); | |
329 | } | |
330 | ||
b12a03ce | 331 | extern void clock_was_set(void); |
9ec26907 TG |
332 | #ifdef CONFIG_TIMERFD |
333 | extern void timerfd_clock_was_set(void); | |
334 | #else | |
335 | static inline void timerfd_clock_was_set(void) { } | |
336 | #endif | |
b12a03ce TG |
337 | extern void hrtimers_resume(void); |
338 | ||
2e94d1f7 | 339 | DECLARE_PER_CPU(struct tick_device, tick_cpu_device); |
2e94d1f7 AV |
340 | |
341 | ||
c0a31329 TG |
342 | /* Exported timer functions: */ |
343 | ||
344 | /* Initialize timers: */ | |
7978672c GA |
345 | extern void hrtimer_init(struct hrtimer *timer, clockid_t which_clock, |
346 | enum hrtimer_mode mode); | |
c0a31329 | 347 | |
237fc6e7 TG |
348 | #ifdef CONFIG_DEBUG_OBJECTS_TIMERS |
349 | extern void hrtimer_init_on_stack(struct hrtimer *timer, clockid_t which_clock, | |
350 | enum hrtimer_mode mode); | |
351 | ||
352 | extern void destroy_hrtimer_on_stack(struct hrtimer *timer); | |
353 | #else | |
354 | static inline void hrtimer_init_on_stack(struct hrtimer *timer, | |
355 | clockid_t which_clock, | |
356 | enum hrtimer_mode mode) | |
357 | { | |
358 | hrtimer_init(timer, which_clock, mode); | |
359 | } | |
360 | static inline void destroy_hrtimer_on_stack(struct hrtimer *timer) { } | |
361 | #endif | |
362 | ||
c0a31329 | 363 | /* Basic timer operations: */ |
61699e13 | 364 | extern void hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim, |
da8b44d5 | 365 | u64 range_ns, const enum hrtimer_mode mode); |
7f1e2ca9 | 366 | |
02a171af TG |
367 | /** |
368 | * hrtimer_start - (re)start an hrtimer on the current CPU | |
369 | * @timer: the timer to be added | |
370 | * @tim: expiry time | |
371 | * @mode: expiry mode: absolute (HRTIMER_MODE_ABS) or | |
372 | * relative (HRTIMER_MODE_REL) | |
02a171af | 373 | */ |
61699e13 TG |
374 | static inline void hrtimer_start(struct hrtimer *timer, ktime_t tim, |
375 | const enum hrtimer_mode mode) | |
02a171af | 376 | { |
61699e13 | 377 | hrtimer_start_range_ns(timer, tim, 0, mode); |
02a171af TG |
378 | } |
379 | ||
c0a31329 TG |
380 | extern int hrtimer_cancel(struct hrtimer *timer); |
381 | extern int hrtimer_try_to_cancel(struct hrtimer *timer); | |
382 | ||
61699e13 TG |
383 | static inline void hrtimer_start_expires(struct hrtimer *timer, |
384 | enum hrtimer_mode mode) | |
63ca243b | 385 | { |
da8b44d5 | 386 | u64 delta; |
da8f2e17 AV |
387 | ktime_t soft, hard; |
388 | soft = hrtimer_get_softexpires(timer); | |
389 | hard = hrtimer_get_expires(timer); | |
390 | delta = ktime_to_ns(ktime_sub(hard, soft)); | |
61699e13 | 391 | hrtimer_start_range_ns(timer, soft, delta, mode); |
63ca243b AV |
392 | } |
393 | ||
61699e13 | 394 | static inline void hrtimer_restart(struct hrtimer *timer) |
c9cb2e3d | 395 | { |
61699e13 | 396 | hrtimer_start_expires(timer, HRTIMER_MODE_ABS); |
c9cb2e3d | 397 | } |
c0a31329 TG |
398 | |
399 | /* Query timers: */ | |
203cbf77 TG |
400 | extern ktime_t __hrtimer_get_remaining(const struct hrtimer *timer, bool adjust); |
401 | ||
402 | static inline ktime_t hrtimer_get_remaining(const struct hrtimer *timer) | |
403 | { | |
404 | return __hrtimer_get_remaining(timer, false); | |
405 | } | |
c0a31329 | 406 | |
c1ad348b | 407 | extern u64 hrtimer_get_next_event(void); |
69239749 | 408 | |
887d9dc9 | 409 | extern bool hrtimer_active(const struct hrtimer *timer); |
c0a31329 | 410 | |
54cdfdb4 TG |
411 | /* |
412 | * Helper function to check, whether the timer is on one of the queues | |
413 | */ | |
414 | static inline int hrtimer_is_queued(struct hrtimer *timer) | |
415 | { | |
ca109491 | 416 | return timer->state & HRTIMER_STATE_ENQUEUED; |
54cdfdb4 TG |
417 | } |
418 | ||
4346f654 OH |
419 | /* |
420 | * Helper function to check, whether the timer is running the callback | |
421 | * function | |
422 | */ | |
423 | static inline int hrtimer_callback_running(struct hrtimer *timer) | |
424 | { | |
887d9dc9 | 425 | return timer->base->cpu_base->running == timer; |
4346f654 OH |
426 | } |
427 | ||
c0a31329 | 428 | /* Forward a hrtimer so it expires after now: */ |
4d672e7a | 429 | extern u64 |
44f21475 | 430 | hrtimer_forward(struct hrtimer *timer, ktime_t now, ktime_t interval); |
c0a31329 | 431 | |
91e5a217 TG |
432 | /** |
433 | * hrtimer_forward_now - forward the timer expiry so it expires after now | |
434 | * @timer: hrtimer to forward | |
435 | * @interval: the interval to forward | |
436 | * | |
437 | * Forward the timer expiry so it will expire after the current time | |
438 | * of the hrtimer clock base. Returns the number of overruns. | |
439 | * | |
440 | * Can be safely called from the callback function of @timer. If | |
441 | * called from other contexts @timer must neither be enqueued nor | |
442 | * running the callback and the caller needs to take care of | |
443 | * serialization. | |
444 | * | |
445 | * Note: This only updates the timer expiry value and does not requeue | |
446 | * the timer. | |
447 | */ | |
4d672e7a DL |
448 | static inline u64 hrtimer_forward_now(struct hrtimer *timer, |
449 | ktime_t interval) | |
5e05ad7d DL |
450 | { |
451 | return hrtimer_forward(timer, timer->base->get_time(), interval); | |
452 | } | |
453 | ||
10c94ec1 | 454 | /* Precise sleep: */ |
ce41aaf4 | 455 | |
c0edd7c9 | 456 | extern int nanosleep_copyout(struct restart_block *, struct timespec64 *); |
938e7cf2 | 457 | extern long hrtimer_nanosleep(const struct timespec64 *rqtp, |
10c94ec1 TG |
458 | const enum hrtimer_mode mode, |
459 | const clockid_t clockid); | |
460 | ||
00362e33 TG |
461 | extern void hrtimer_init_sleeper(struct hrtimer_sleeper *sl, |
462 | struct task_struct *tsk); | |
463 | ||
da8b44d5 | 464 | extern int schedule_hrtimeout_range(ktime_t *expires, u64 delta, |
654c8e0b | 465 | const enum hrtimer_mode mode); |
351b3f7a | 466 | extern int schedule_hrtimeout_range_clock(ktime_t *expires, |
da8b44d5 JS |
467 | u64 delta, |
468 | const enum hrtimer_mode mode, | |
469 | int clock); | |
7bb67439 AV |
470 | extern int schedule_hrtimeout(ktime_t *expires, const enum hrtimer_mode mode); |
471 | ||
c0a31329 TG |
472 | /* Soft interrupt function to run the hrtimer queues: */ |
473 | extern void hrtimer_run_queues(void); | |
474 | ||
475 | /* Bootup initialization: */ | |
476 | extern void __init hrtimers_init(void); | |
477 | ||
88ad0bf6 IM |
478 | /* Show pending timers: */ |
479 | extern void sysrq_timer_list_show(void); | |
480 | ||
27590dc1 TG |
481 | int hrtimers_prepare_cpu(unsigned int cpu); |
482 | #ifdef CONFIG_HOTPLUG_CPU | |
483 | int hrtimers_dead_cpu(unsigned int cpu); | |
484 | #else | |
485 | #define hrtimers_dead_cpu NULL | |
486 | #endif | |
487 | ||
c0a31329 | 488 | #endif |