Lines Matching +full:local +full:- +full:timers
1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright(C) 2005-2006, Thomas Gleixner <tglx@linutronix.de>
4 * Copyright(C) 2005-2007, Red Hat, Inc., Ingo Molnar
5 * Copyright(C) 2006-2007 Timesys Corp., Thomas Gleixner
7 * High-resolution kernel timers
9 * In contrast to the low-resolution timeout API, aka timer wheel,
50 #include "tick-internal.h"
53 * Masks for selecting the soft and hard context timers from
54 * cpu_base->active
57 #define HRTIMER_ACTIVE_HARD ((1U << MASK_SHIFT) - 1)
119 [0 ... MAX_CLOCKS - 1] = HRTIMER_MAX_CLOCK_BASES,
136 * timer->base->cpu_base
155 * means that all timers which are tied to this base via timer->base are
158 * So __run_timers/migrate_timers can safely modify all timers which could
162 * possible to set timer->base = &migration_base and drop the lock: the timer
168 __acquires(&timer->base->lock) in lock_hrtimer_base()
173 base = READ_ONCE(timer->base); in lock_hrtimer_base()
175 raw_spin_lock_irqsave(&base->cpu_base->lock, *flags); in lock_hrtimer_base()
176 if (likely(base == timer->base)) in lock_hrtimer_base()
179 raw_spin_unlock_irqrestore(&base->cpu_base->lock, *flags); in lock_hrtimer_base()
192 * Called with cpu_base->lock of target cpu held.
199 expires = ktime_sub(hrtimer_get_expires(timer), new_base->offset); in hrtimer_check_target()
200 return expires < new_base->cpu_base->expires_next; in hrtimer_check_target()
215 * We switch the timer base to a power-optimized selected CPU target,
217 * - NO_HZ_COMMON is enabled
218 * - timer migration is enabled
219 * - the timer callback is not running
220 * - the timer is not the first expiring timer on the new target
232 int basenum = base->index; in switch_hrtimer_base()
237 new_base = &new_cpu_base->clock_base[basenum]; in switch_hrtimer_base()
253 WRITE_ONCE(timer->base, &migration_base); in switch_hrtimer_base()
254 raw_spin_unlock(&base->cpu_base->lock); in switch_hrtimer_base()
255 raw_spin_lock(&new_base->cpu_base->lock); in switch_hrtimer_base()
259 raw_spin_unlock(&new_base->cpu_base->lock); in switch_hrtimer_base()
260 raw_spin_lock(&base->cpu_base->lock); in switch_hrtimer_base()
262 WRITE_ONCE(timer->base, base); in switch_hrtimer_base()
265 WRITE_ONCE(timer->base, new_base); in switch_hrtimer_base()
285 __acquires(&timer->base->cpu_base->lock) in lock_hrtimer_base()
287 struct hrtimer_clock_base *base = timer->base; in lock_hrtimer_base()
289 raw_spin_lock_irqsave(&base->cpu_base->lock, *flags); in lock_hrtimer_base()
313 tmp = dclc < 0 ? -dclc : dclc; in __ktime_divns()
322 return dclc < 0 ? -tmp : tmp; in __ktime_divns()
352 return ((struct hrtimer *) addr)->function; in hrtimer_debug_hint()
357 * - an active object is initialized
375 * - an active object is activated
376 * - an unknown non-static object is activated
391 * - an active object is freed
448 debug_object_init_on_stack(&sl->timer, &hrtimer_debug_descr); in hrtimer_init_sleeper_on_stack()
499 return &cpu_base->clock_base[idx]; in __next_base()
517 next = timerqueue_getnext(&base->active); in __hrtimer_next_event_base()
527 expires = ktime_sub(hrtimer_get_expires(timer), base->offset); in __hrtimer_next_event_base()
535 if (timer->is_soft) in __hrtimer_next_event_base()
536 cpu_base->softirq_next_timer = timer; in __hrtimer_next_event_base()
538 cpu_base->next_timer = timer; in __hrtimer_next_event_base()
542 * clock_was_set() might have changed base->offset of any of in __hrtimer_next_event_base()
559 * those timers will get run whenever the softirq gets handled, at the end of
560 * hrtimer_run_softirq(), hrtimer_update_softirq_timer() will re-add these bases.
567 * - HRTIMER_ACTIVE_ALL,
568 * - HRTIMER_ACTIVE_SOFT, or
569 * - HRTIMER_ACTIVE_HARD.
578 if (!cpu_base->softirq_activated && (active_mask & HRTIMER_ACTIVE_SOFT)) { in __hrtimer_get_next_event()
579 active = cpu_base->active_bases & HRTIMER_ACTIVE_SOFT; in __hrtimer_get_next_event()
580 cpu_base->softirq_next_timer = NULL; in __hrtimer_get_next_event()
584 next_timer = cpu_base->softirq_next_timer; in __hrtimer_get_next_event()
588 active = cpu_base->active_bases & HRTIMER_ACTIVE_HARD; in __hrtimer_get_next_event()
589 cpu_base->next_timer = next_timer; in __hrtimer_get_next_event()
606 if (!cpu_base->softirq_activated) { in hrtimer_update_next_event()
612 cpu_base->softirq_expires_next = soft; in hrtimer_update_next_event()
617 * If a softirq timer is expiring first, update cpu_base->next_timer in hrtimer_update_next_event()
621 cpu_base->next_timer = cpu_base->softirq_next_timer; in hrtimer_update_next_event()
630 ktime_t *offs_real = &base->clock_base[HRTIMER_BASE_REALTIME].offset; in hrtimer_update_base()
631 ktime_t *offs_boot = &base->clock_base[HRTIMER_BASE_BOOTTIME].offset; in hrtimer_update_base()
632 ktime_t *offs_tai = &base->clock_base[HRTIMER_BASE_TAI].offset; in hrtimer_update_base()
634 ktime_t now = ktime_get_update_offsets_now(&base->clock_was_set_seq, in hrtimer_update_base()
637 base->clock_base[HRTIMER_BASE_REALTIME_SOFT].offset = *offs_real; in hrtimer_update_base()
638 base->clock_base[HRTIMER_BASE_BOOTTIME_SOFT].offset = *offs_boot; in hrtimer_update_base()
639 base->clock_base[HRTIMER_BASE_TAI_SOFT].offset = *offs_tai; in hrtimer_update_base()
650 cpu_base->hres_active : 0; in hrtimer_hres_active()
657 cpu_base->expires_next = expires_next; in __hrtimer_reprogram()
673 * set. So we'd effectively block all timers until the T2 event in __hrtimer_reprogram()
676 if (!hrtimer_hres_active(cpu_base) || cpu_base->hang_detected) in __hrtimer_reprogram()
685 * Called with interrupts disabled and base->lock held
694 if (skip_equal && expires_next == cpu_base->expires_next) in hrtimer_force_reprogram()
697 __hrtimer_reprogram(cpu_base, cpu_base->next_timer, expires_next); in hrtimer_force_reprogram()
721 * hrtimer_high_res_enabled - query, if the highres mode is enabled
739 base->cpu); in hrtimer_switch_to_hres()
742 base->hres_active = 1; in hrtimer_switch_to_hres()
762 * - CONFIG_HIGH_RES_TIMERS is enabled.
763 * - CONFIG_NOHZ_COMMON is enabled
790 raw_spin_lock(&base->lock); in retrigger_next_event()
796 raw_spin_unlock(&base->lock); in retrigger_next_event()
801 * timers, we have to check, whether it expires earlier than the timer for
804 * Called with interrupts disabled and base->cpu_base.lock held
809 struct hrtimer_clock_base *base = timer->base; in hrtimer_reprogram()
810 ktime_t expires = ktime_sub(hrtimer_get_expires(timer), base->offset); in hrtimer_reprogram()
816 * expiry time which is less than base->offset. Set it to 0. in hrtimer_reprogram()
821 if (timer->is_soft) { in hrtimer_reprogram()
826 * first hard hrtimer on the remote CPU - in hrtimer_reprogram()
829 struct hrtimer_cpu_base *timer_cpu_base = base->cpu_base; in hrtimer_reprogram()
831 if (timer_cpu_base->softirq_activated) in hrtimer_reprogram()
834 if (!ktime_before(expires, timer_cpu_base->softirq_expires_next)) in hrtimer_reprogram()
837 timer_cpu_base->softirq_next_timer = timer; in hrtimer_reprogram()
838 timer_cpu_base->softirq_expires_next = expires; in hrtimer_reprogram()
840 if (!ktime_before(expires, timer_cpu_base->expires_next) || in hrtimer_reprogram()
849 if (base->cpu_base != cpu_base) in hrtimer_reprogram()
852 if (expires >= cpu_base->expires_next) in hrtimer_reprogram()
859 if (cpu_base->in_hrtirq) in hrtimer_reprogram()
862 cpu_base->next_timer = timer; in hrtimer_reprogram()
884 seq = cpu_base->clock_was_set_seq; in update_needs_ipi()
891 if (seq == cpu_base->clock_was_set_seq) in update_needs_ipi()
899 if (cpu_base->in_hrtirq) in update_needs_ipi()
908 active &= cpu_base->active_bases; in update_needs_ipi()
913 next = timerqueue_getnext(&base->active); in update_needs_ipi()
914 expires = ktime_sub(next->expires, base->offset); in update_needs_ipi()
915 if (expires < cpu_base->expires_next) in update_needs_ipi()
919 if (base->clockid < HRTIMER_BASE_MONOTONIC_SOFT) in update_needs_ipi()
921 if (cpu_base->softirq_activated) in update_needs_ipi()
923 if (expires < cpu_base->softirq_expires_next) in update_needs_ipi()
934 * vs. CLOCK_MONOTONIC. When high resolution timers are enabled, then this
963 raw_spin_lock_irqsave(&cpu_base->lock, flags); in clock_was_set()
968 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in clock_was_set()
1005 /* Retrigger on the local CPU */ in hrtimers_resume_local()
1014 __releases(&timer->base->cpu_base->lock) in unlock_hrtimer_base()
1016 raw_spin_unlock_irqrestore(&timer->base->cpu_base->lock, *flags); in unlock_hrtimer_base()
1020 * hrtimer_forward() - forward the timer expiry
1048 if (WARN_ON(timer->state & HRTIMER_STATE_ENQUEUED)) in hrtimer_forward()
1074 * enqueue_hrtimer - internal function to (re)start a timer
1086 WARN_ON_ONCE(!base->cpu_base->online); in enqueue_hrtimer()
1088 base->cpu_base->active_bases |= 1 << base->index; in enqueue_hrtimer()
1091 WRITE_ONCE(timer->state, HRTIMER_STATE_ENQUEUED); in enqueue_hrtimer()
1093 return timerqueue_add(&base->active, &timer->node); in enqueue_hrtimer()
1097 * __remove_hrtimer - internal function to remove a timer
1110 struct hrtimer_cpu_base *cpu_base = base->cpu_base; in __remove_hrtimer()
1111 u8 state = timer->state; in __remove_hrtimer()
1114 WRITE_ONCE(timer->state, newstate); in __remove_hrtimer()
1118 if (!timerqueue_del(&base->active, &timer->node)) in __remove_hrtimer()
1119 cpu_base->active_bases &= ~(1 << base->index); in __remove_hrtimer()
1123 * cpu_base->next_timer. This happens when we remove the first in __remove_hrtimer()
1125 * cpu_base->next_timer. So the worst thing what can happen is in __remove_hrtimer()
1129 if (reprogram && timer == cpu_base->next_timer) in __remove_hrtimer()
1140 u8 state = timer->state; in remove_hrtimer()
1154 reprogram = base->cpu_base == this_cpu_ptr(&hrtimer_bases); in remove_hrtimer()
1158 * required if the timer is local. If it is local and about in remove_hrtimer()
1179 * granular time values. For relative timers we add hrtimer_resolution in hrtimer_update_lowres()
1182 timer->is_rel = mode & HRTIMER_MODE_REL; in hrtimer_update_lowres()
1183 if (timer->is_rel) in hrtimer_update_lowres()
1202 * hrtimer. cpu_base->softirq_expires_next needs to be updated! in hrtimer_update_softirq_timer()
1208 * cpu_base->*next_timer is recomputed by __hrtimer_get_next_event() in hrtimer_update_softirq_timer()
1209 * cpu_base->*expires_next is only set by hrtimer_reprogram() in hrtimer_update_softirq_timer()
1211 hrtimer_reprogram(cpu_base->softirq_next_timer, reprogram); in hrtimer_update_softirq_timer()
1222 * If the timer is on the local cpu base and is the first expiring in __hrtimer_start_range_ns()
1225 * reprogram on removal, keep the timer local to the current CPU in __hrtimer_start_range_ns()
1229 force_local = base->cpu_base == this_cpu_ptr(&hrtimer_bases); in __hrtimer_start_range_ns()
1230 force_local &= base->cpu_base->next_timer == timer; in __hrtimer_start_range_ns()
1238 * skip reprogramming, keep the timer local and enforce in __hrtimer_start_range_ns()
1246 tim = ktime_add_safe(tim, base->get_time()); in __hrtimer_start_range_ns()
1269 hrtimer_force_reprogram(new_base->cpu_base, 1); in __hrtimer_start_range_ns()
1274 * hrtimer_start_range_ns - (re)start an hrtimer
1288 if (WARN_ON_ONCE(!timer->function)) in hrtimer_start_range_ns()
1293 * expiry mode because unmarked timers are moved to softirq expiry. in hrtimer_start_range_ns()
1296 WARN_ON_ONCE(!(mode & HRTIMER_MODE_SOFT) ^ !timer->is_soft); in hrtimer_start_range_ns()
1298 WARN_ON_ONCE(!(mode & HRTIMER_MODE_HARD) ^ !timer->is_hard); in hrtimer_start_range_ns()
1310 * hrtimer_try_to_cancel - try to deactivate a timer
1317 * * -1 when the timer is currently executing the callback function and
1324 int ret = -1; in hrtimer_try_to_cancel()
1350 spin_lock_init(&base->softirq_expiry_lock); in hrtimer_cpu_base_init_expiry_lock()
1354 __acquires(&base->softirq_expiry_lock) in hrtimer_cpu_base_lock_expiry()
1356 spin_lock(&base->softirq_expiry_lock); in hrtimer_cpu_base_lock_expiry()
1360 __releases(&base->softirq_expiry_lock) in hrtimer_cpu_base_unlock_expiry()
1362 spin_unlock(&base->softirq_expiry_lock); in hrtimer_cpu_base_unlock_expiry()
1368 * If there is a waiter for cpu_base->expiry_lock, then it was waiting for
1375 if (atomic_read(&cpu_base->timer_waiters)) { in hrtimer_sync_wait_running()
1376 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in hrtimer_sync_wait_running()
1377 spin_unlock(&cpu_base->softirq_expiry_lock); in hrtimer_sync_wait_running()
1378 spin_lock(&cpu_base->softirq_expiry_lock); in hrtimer_sync_wait_running()
1379 raw_spin_lock_irq(&cpu_base->lock); in hrtimer_sync_wait_running()
1392 * - If the caller is on a remote CPU then it has to spin wait for the timer
1395 * - If the caller originates from the task which preempted the timer
1402 struct hrtimer_clock_base *base = READ_ONCE(timer->base); in hrtimer_cancel_wait_running()
1408 if (!timer->is_soft || is_migration_base(base)) { in hrtimer_cancel_wait_running()
1420 atomic_inc(&base->cpu_base->timer_waiters); in hrtimer_cancel_wait_running()
1421 spin_lock_bh(&base->cpu_base->softirq_expiry_lock); in hrtimer_cancel_wait_running()
1422 atomic_dec(&base->cpu_base->timer_waiters); in hrtimer_cancel_wait_running()
1423 spin_unlock_bh(&base->cpu_base->softirq_expiry_lock); in hrtimer_cancel_wait_running()
1437 * hrtimer_cancel - cancel a timer and wait for the handler to finish.
1459 * __hrtimer_get_remaining - get remaining time for the timer
1461 * @adjust: adjust relative timers when CONFIG_TIME_LOW_RES=y
1481 * hrtimer_get_next_event - get the time until next expiry event
1491 raw_spin_lock_irqsave(&cpu_base->lock, flags); in hrtimer_get_next_event()
1496 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in hrtimer_get_next_event()
1502 * hrtimer_next_event_without - time until next expiry event w/o one timer
1505 * Returns the next expiry time over all timers except for the @exclude one or
1514 raw_spin_lock_irqsave(&cpu_base->lock, flags); in hrtimer_next_event_without()
1519 if (!cpu_base->softirq_activated) { in hrtimer_next_event_without()
1520 active = cpu_base->active_bases & HRTIMER_ACTIVE_SOFT; in hrtimer_next_event_without()
1524 active = cpu_base->active_bases & HRTIMER_ACTIVE_HARD; in hrtimer_next_event_without()
1529 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in hrtimer_next_event_without()
1568 * POSIX magic: Relative CLOCK_REALTIME timers are not affected by in __hrtimer_init()
1577 timer->is_soft = softtimer; in __hrtimer_init()
1578 timer->is_hard = !!(mode & HRTIMER_MODE_HARD); in __hrtimer_init()
1579 timer->base = &cpu_base->clock_base[base]; in __hrtimer_init()
1580 timerqueue_init(&timer->node); in __hrtimer_init()
1584 * hrtimer_init - initialize a timer to the given clock
1616 base = READ_ONCE(timer->base); in hrtimer_active()
1617 seq = raw_read_seqcount_begin(&base->seq); in hrtimer_active()
1619 if (timer->state != HRTIMER_STATE_INACTIVE || in hrtimer_active()
1620 base->running == timer) in hrtimer_active()
1623 } while (read_seqcount_retry(&base->seq, seq) || in hrtimer_active()
1624 base != READ_ONCE(timer->base)); in hrtimer_active()
1634 * - queued: the timer is queued
1635 * - callback: the timer is being ran
1636 * - post: the timer is inactive or (re)queued
1638 * On the read side we ensure we observe timer->state and cpu_base->running
1640 * This includes timer->base changing because sequence numbers alone are
1651 unsigned long flags) __must_hold(&cpu_base->lock) in __run_hrtimer()
1657 lockdep_assert_held(&cpu_base->lock); in __run_hrtimer()
1660 base->running = timer; in __run_hrtimer()
1663 * Separate the ->running assignment from the ->state assignment. in __run_hrtimer()
1666 * hrtimer_active() cannot observe base->running == NULL && in __run_hrtimer()
1667 * timer->state == INACTIVE. in __run_hrtimer()
1669 raw_write_seqcount_barrier(&base->seq); in __run_hrtimer()
1672 fn = timer->function; in __run_hrtimer()
1680 timer->is_rel = false; in __run_hrtimer()
1687 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in __run_hrtimer()
1695 raw_spin_lock_irq(&cpu_base->lock); in __run_hrtimer()
1702 * Note: Because we dropped the cpu_base->lock above, in __run_hrtimer()
1707 !(timer->state & HRTIMER_STATE_ENQUEUED)) in __run_hrtimer()
1711 * Separate the ->running assignment from the ->state assignment. in __run_hrtimer()
1714 * hrtimer_active() cannot observe base->running.timer == NULL && in __run_hrtimer()
1715 * timer->state == INACTIVE. in __run_hrtimer()
1717 raw_write_seqcount_barrier(&base->seq); in __run_hrtimer()
1719 WARN_ON_ONCE(base->running != timer); in __run_hrtimer()
1720 base->running = NULL; in __run_hrtimer()
1727 unsigned int active = cpu_base->active_bases & active_mask; in __hrtimer_run_queues()
1733 basenow = ktime_add(now, base->offset); in __hrtimer_run_queues()
1735 while ((node = timerqueue_getnext(&base->active))) { in __hrtimer_run_queues()
1742 * minimizing wakeups, not running timers at the in __hrtimer_run_queues()
1748 * We don't add extra wakeups by delaying timers that in __hrtimer_run_queues()
1749 * are right-of a not yet expired timer, because that in __hrtimer_run_queues()
1769 raw_spin_lock_irqsave(&cpu_base->lock, flags); in hrtimer_run_softirq()
1774 cpu_base->softirq_activated = 0; in hrtimer_run_softirq()
1777 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in hrtimer_run_softirq()
1794 BUG_ON(!cpu_base->hres_active); in hrtimer_interrupt()
1795 cpu_base->nr_events++; in hrtimer_interrupt()
1796 dev->next_event = KTIME_MAX; in hrtimer_interrupt()
1798 raw_spin_lock_irqsave(&cpu_base->lock, flags); in hrtimer_interrupt()
1801 cpu_base->in_hrtirq = 1; in hrtimer_interrupt()
1803 * We set expires_next to KTIME_MAX here with cpu_base->lock in hrtimer_interrupt()
1806 * timers which run their callback and need to be requeued on in hrtimer_interrupt()
1809 cpu_base->expires_next = KTIME_MAX; in hrtimer_interrupt()
1811 if (!ktime_before(now, cpu_base->softirq_expires_next)) { in hrtimer_interrupt()
1812 cpu_base->softirq_expires_next = KTIME_MAX; in hrtimer_interrupt()
1813 cpu_base->softirq_activated = 1; in hrtimer_interrupt()
1825 cpu_base->expires_next = expires_next; in hrtimer_interrupt()
1826 cpu_base->in_hrtirq = 0; in hrtimer_interrupt()
1827 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in hrtimer_interrupt()
1831 cpu_base->hang_detected = 0; in hrtimer_interrupt()
1837 * - tracing in hrtimer_interrupt()
1838 * - long lasting callbacks in hrtimer_interrupt()
1839 * - being scheduled away when running in a VM in hrtimer_interrupt()
1848 raw_spin_lock_irqsave(&cpu_base->lock, flags); in hrtimer_interrupt()
1850 cpu_base->nr_retries++; in hrtimer_interrupt()
1859 cpu_base->nr_hangs++; in hrtimer_interrupt()
1860 cpu_base->hang_detected = 1; in hrtimer_interrupt()
1861 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in hrtimer_interrupt()
1864 if ((unsigned int)delta > cpu_base->max_hang_time) in hrtimer_interrupt()
1865 cpu_base->max_hang_time = (unsigned int) delta; in hrtimer_interrupt()
1903 raw_spin_lock_irqsave(&cpu_base->lock, flags); in hrtimer_run_queues()
1906 if (!ktime_before(now, cpu_base->softirq_expires_next)) { in hrtimer_run_queues()
1907 cpu_base->softirq_expires_next = KTIME_MAX; in hrtimer_run_queues()
1908 cpu_base->softirq_activated = 1; in hrtimer_run_queues()
1913 raw_spin_unlock_irqrestore(&cpu_base->lock, flags); in hrtimer_run_queues()
1923 struct task_struct *task = t->task; in hrtimer_wakeup()
1925 t->task = NULL; in hrtimer_wakeup()
1933 * hrtimer_sleeper_start_expires - Start a hrtimer sleeper timer
1937 * Wrapper around hrtimer_start_expires() for hrtimer_sleeper based timers
1950 if (IS_ENABLED(CONFIG_PREEMPT_RT) && sl->timer.is_hard) in hrtimer_sleeper_start_expires()
1953 hrtimer_start_expires(&sl->timer, mode); in hrtimer_sleeper_start_expires()
1970 * spawn many threads which arm timers for the same expiry time on in __hrtimer_init_sleeper()
1974 * OTOH, privileged real-time user space applications rely on the in __hrtimer_init_sleeper()
1976 * a real-time scheduling class, mark the mode for hard interrupt in __hrtimer_init_sleeper()
1984 __hrtimer_init(&sl->timer, clock_id, mode); in __hrtimer_init_sleeper()
1985 sl->timer.function = hrtimer_wakeup; in __hrtimer_init_sleeper()
1986 sl->task = current; in __hrtimer_init_sleeper()
1990 * hrtimer_init_sleeper - initialize sleeper to the given clock
1998 debug_init(&sl->timer, clock_id, mode); in hrtimer_init_sleeper()
2006 switch(restart->nanosleep.type) { in nanosleep_copyout()
2009 if (put_old_timespec32(ts, restart->nanosleep.compat_rmtp)) in nanosleep_copyout()
2010 return -EFAULT; in nanosleep_copyout()
2014 if (put_timespec64(ts, restart->nanosleep.rmtp)) in nanosleep_copyout()
2015 return -EFAULT; in nanosleep_copyout()
2020 return -ERESTART_RESTARTBLOCK; in nanosleep_copyout()
2031 if (likely(t->task)) in do_nanosleep()
2034 hrtimer_cancel(&t->timer); in do_nanosleep()
2037 } while (t->task && !signal_pending(current)); in do_nanosleep()
2041 if (!t->task) in do_nanosleep()
2044 restart = ¤t->restart_block; in do_nanosleep()
2045 if (restart->nanosleep.type != TT_NONE) { in do_nanosleep()
2046 ktime_t rem = hrtimer_expires_remaining(&t->timer); in do_nanosleep()
2055 return -ERESTART_RESTARTBLOCK; in do_nanosleep()
2063 hrtimer_init_sleeper_on_stack(&t, restart->nanosleep.clockid, in hrtimer_nanosleep_restart()
2065 hrtimer_set_expires_tv64(&t.timer, restart->nanosleep.expires); in hrtimer_nanosleep_restart()
2079 hrtimer_set_expires_range_ns(&t.timer, rqtp, current->timer_slack_ns); in hrtimer_nanosleep()
2081 if (ret != -ERESTART_RESTARTBLOCK) in hrtimer_nanosleep()
2084 /* Absolute timers do not update the rmtp value and restart: */ in hrtimer_nanosleep()
2086 ret = -ERESTARTNOHAND; in hrtimer_nanosleep()
2090 restart = ¤t->restart_block; in hrtimer_nanosleep()
2091 restart->nanosleep.clockid = t.timer.base->clockid; in hrtimer_nanosleep()
2092 restart->nanosleep.expires = hrtimer_get_expires_tv64(&t.timer); in hrtimer_nanosleep()
2107 return -EFAULT; in SYSCALL_DEFINE2()
2110 return -EINVAL; in SYSCALL_DEFINE2()
2112 current->restart_block.fn = do_no_restart_syscall; in SYSCALL_DEFINE2()
2113 current->restart_block.nanosleep.type = rmtp ? TT_NATIVE : TT_NONE; in SYSCALL_DEFINE2()
2114 current->restart_block.nanosleep.rmtp = rmtp; in SYSCALL_DEFINE2()
2129 return -EFAULT; in SYSCALL_DEFINE2()
2132 return -EINVAL; in SYSCALL_DEFINE2()
2134 current->restart_block.fn = do_no_restart_syscall; in SYSCALL_DEFINE2()
2135 current->restart_block.nanosleep.type = rmtp ? TT_COMPAT : TT_NONE; in SYSCALL_DEFINE2()
2136 current->restart_block.nanosleep.compat_rmtp = rmtp; in SYSCALL_DEFINE2()
2143 * Functions related to boot-time initialization:
2151 struct hrtimer_clock_base *clock_b = &cpu_base->clock_base[i]; in hrtimers_prepare_cpu()
2153 clock_b->cpu_base = cpu_base; in hrtimers_prepare_cpu()
2154 seqcount_raw_spinlock_init(&clock_b->seq, &cpu_base->lock); in hrtimers_prepare_cpu()
2155 timerqueue_init_head(&clock_b->active); in hrtimers_prepare_cpu()
2158 cpu_base->cpu = cpu; in hrtimers_prepare_cpu()
2159 cpu_base->active_bases = 0; in hrtimers_prepare_cpu()
2160 cpu_base->hres_active = 0; in hrtimers_prepare_cpu()
2161 cpu_base->hang_detected = 0; in hrtimers_prepare_cpu()
2162 cpu_base->next_timer = NULL; in hrtimers_prepare_cpu()
2163 cpu_base->softirq_next_timer = NULL; in hrtimers_prepare_cpu()
2164 cpu_base->expires_next = KTIME_MAX; in hrtimers_prepare_cpu()
2165 cpu_base->softirq_expires_next = KTIME_MAX; in hrtimers_prepare_cpu()
2166 cpu_base->online = 1; in hrtimers_prepare_cpu()
2179 while ((node = timerqueue_getnext(&old_base->active))) { in migrate_hrtimer_list()
2190 timer->base = new_base; in migrate_hrtimer_list()
2192 * Enqueue the timers on the new cpu. This does not in migrate_hrtimer_list()
2196 * sort out already expired timers and reprogram the in migrate_hrtimer_list()
2215 raw_spin_lock(&old_base->lock); in hrtimers_cpu_dying()
2216 raw_spin_lock_nested(&new_base->lock, SINGLE_DEPTH_NESTING); in hrtimers_cpu_dying()
2219 migrate_hrtimer_list(&old_base->clock_base[i], in hrtimers_cpu_dying()
2220 &new_base->clock_base[i]); in hrtimers_cpu_dying()
2231 raw_spin_unlock(&new_base->lock); in hrtimers_cpu_dying()
2232 old_base->online = 0; in hrtimers_cpu_dying()
2233 raw_spin_unlock(&old_base->lock); in hrtimers_cpu_dying()
2247 * schedule_hrtimeout_range_clock - sleep until timeout
2273 return -EINTR; in schedule_hrtimeout_range_clock()
2288 return !t.task ? 0 : -EINTR; in schedule_hrtimeout_range_clock()
2293 * schedule_hrtimeout_range - sleep until timeout
2308 * You can set the task state as follows -
2310 * %TASK_UNINTERRUPTIBLE - at least @timeout time is guaranteed to
2314 * %TASK_INTERRUPTIBLE - the routine may return early if a signal is
2323 * by an explicit wakeup, it returns -EINTR.
2334 * schedule_hrtimeout - sleep until timeout
2342 * You can set the task state as follows -
2344 * %TASK_UNINTERRUPTIBLE - at least @timeout time is guaranteed to
2348 * %TASK_INTERRUPTIBLE - the routine may return early if a signal is
2357 * by an explicit wakeup, it returns -EINTR.