diff options
Diffstat (limited to 'kernel/time')
| -rw-r--r-- | kernel/time/Kconfig | 5 | ||||
| -rw-r--r-- | kernel/time/Makefile | 2 | ||||
| -rw-r--r-- | kernel/time/clockevents.c | 3 | ||||
| -rw-r--r-- | kernel/time/clocksource.c | 22 | ||||
| -rw-r--r-- | kernel/time/tick-broadcast.c | 51 | ||||
| -rw-r--r-- | kernel/time/tick-common.c | 5 | ||||
| -rw-r--r-- | kernel/time/tick-sched.c | 2 | ||||
| -rw-r--r-- | kernel/time/timekeeping.c | 12 |
8 files changed, 43 insertions, 59 deletions
diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig index f66351126544..8d53106a0a92 100644 --- a/kernel/time/Kconfig +++ b/kernel/time/Kconfig @@ -23,3 +23,8 @@ config HIGH_RES_TIMERS hardware is not capable then this option only increases the size of the kernel image. +config GENERIC_CLOCKEVENTS_BUILD + bool + default y + depends on GENERIC_CLOCKEVENTS || GENERIC_CLOCKEVENTS_MIGR + diff --git a/kernel/time/Makefile b/kernel/time/Makefile index 99b6034fc86b..905b0b50792d 100644 --- a/kernel/time/Makefile +++ b/kernel/time/Makefile @@ -1,6 +1,6 @@ obj-y += timekeeping.o ntp.o clocksource.o jiffies.o timer_list.o -obj-$(CONFIG_GENERIC_CLOCKEVENTS) += clockevents.o +obj-$(CONFIG_GENERIC_CLOCKEVENTS_BUILD) += clockevents.o obj-$(CONFIG_GENERIC_CLOCKEVENTS) += tick-common.o obj-$(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) += tick-broadcast.o obj-$(CONFIG_TICK_ONESHOT) += tick-oneshot.o diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c index 41dd3105ce7f..822beebe664a 100644 --- a/kernel/time/clockevents.c +++ b/kernel/time/clockevents.c @@ -194,6 +194,7 @@ void clockevents_exchange_device(struct clock_event_device *old, local_irq_restore(flags); } +#ifdef CONFIG_GENERIC_CLOCKEVENTS /** * clockevents_notify - notification about relevant events */ @@ -222,4 +223,4 @@ void clockevents_notify(unsigned long reason, void *arg) spin_unlock(&clockevents_lock); } EXPORT_SYMBOL_GPL(clockevents_notify); - +#endif diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c index 51b6a6a6158c..c8a9d13874df 100644 --- a/kernel/time/clocksource.c +++ b/kernel/time/clocksource.c @@ -207,15 +207,12 @@ static inline void clocksource_resume_watchdog(void) { } */ void clocksource_resume(void) { - struct list_head *tmp; + struct clocksource *cs; unsigned long flags; spin_lock_irqsave(&clocksource_lock, flags); - list_for_each(tmp, &clocksource_list) { - struct clocksource *cs; - - cs = list_entry(tmp, struct clocksource, list); + list_for_each_entry(cs, &clocksource_list, list) { if (cs->resume) cs->resume(); } @@ -369,7 +366,6 @@ static ssize_t sysfs_override_clocksource(struct sys_device *dev, const char *buf, size_t count) { struct clocksource *ovr = NULL; - struct list_head *tmp; size_t ret = count; int len; @@ -389,12 +385,11 @@ static ssize_t sysfs_override_clocksource(struct sys_device *dev, len = strlen(override_name); if (len) { + struct clocksource *cs; + ovr = clocksource_override; /* try to select it: */ - list_for_each(tmp, &clocksource_list) { - struct clocksource *cs; - - cs = list_entry(tmp, struct clocksource, list); + list_for_each_entry(cs, &clocksource_list, list) { if (strlen(cs->name) == len && !strcmp(cs->name, override_name)) ovr = cs; @@ -422,14 +417,11 @@ static ssize_t sysfs_override_clocksource(struct sys_device *dev, static ssize_t sysfs_show_available_clocksources(struct sys_device *dev, char *buf) { - struct list_head *tmp; + struct clocksource *src; char *curr = buf; spin_lock_irq(&clocksource_lock); - list_for_each(tmp, &clocksource_list) { - struct clocksource *src; - - src = list_entry(tmp, struct clocksource, list); + list_for_each_entry(src, &clocksource_list, list) { curr += sprintf(curr, "%s ", src->name); } spin_unlock_irq(&clocksource_lock); diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c index 0962e0577660..8cfb8b2ce773 100644 --- a/kernel/time/tick-broadcast.c +++ b/kernel/time/tick-broadcast.c @@ -64,8 +64,9 @@ static void tick_broadcast_start_periodic(struct clock_event_device *bc) */ int tick_check_broadcast_device(struct clock_event_device *dev) { - if (tick_broadcast_device.evtdev || - (dev->features & CLOCK_EVT_FEAT_C3STOP)) + if ((tick_broadcast_device.evtdev && + tick_broadcast_device.evtdev->rating >= dev->rating) || + (dev->features & CLOCK_EVT_FEAT_C3STOP)) return 0; clockevents_exchange_device(NULL, dev); @@ -176,8 +177,6 @@ static void tick_do_periodic_broadcast(void) */ static void tick_handle_periodic_broadcast(struct clock_event_device *dev) { - dev->next_event.tv64 = KTIME_MAX; - tick_do_periodic_broadcast(); /* @@ -218,26 +217,33 @@ static void tick_do_broadcast_on_off(void *why) bc = tick_broadcast_device.evtdev; /* - * Is the device in broadcast mode forever or is it not - * affected by the powerstate ? + * Is the device not affected by the powerstate ? */ - if (!dev || !tick_device_is_functional(dev) || - !(dev->features & CLOCK_EVT_FEAT_C3STOP)) + if (!dev || !(dev->features & CLOCK_EVT_FEAT_C3STOP)) + goto out; + + if (!tick_device_is_functional(dev)) goto out; - if (*reason == CLOCK_EVT_NOTIFY_BROADCAST_ON) { + switch (*reason) { + case CLOCK_EVT_NOTIFY_BROADCAST_ON: + case CLOCK_EVT_NOTIFY_BROADCAST_FORCE: if (!cpu_isset(cpu, tick_broadcast_mask)) { cpu_set(cpu, tick_broadcast_mask); if (td->mode == TICKDEV_MODE_PERIODIC) clockevents_set_mode(dev, CLOCK_EVT_MODE_SHUTDOWN); } - } else { + if (*reason == CLOCK_EVT_NOTIFY_BROADCAST_FORCE) + dev->features |= CLOCK_EVT_FEAT_DUMMY; + break; + case CLOCK_EVT_NOTIFY_BROADCAST_OFF: if (cpu_isset(cpu, tick_broadcast_mask)) { cpu_clear(cpu, tick_broadcast_mask); if (td->mode == TICKDEV_MODE_PERIODIC) tick_setup_periodic(dev, 0); } + break; } if (cpus_empty(tick_broadcast_mask)) @@ -258,21 +264,12 @@ out: */ void tick_broadcast_on_off(unsigned long reason, int *oncpu) { - int cpu = get_cpu(); - - if (!cpu_isset(*oncpu, cpu_online_map)) { + if (!cpu_isset(*oncpu, cpu_online_map)) printk(KERN_ERR "tick-braodcast: ignoring broadcast for " "offline CPU #%d\n", *oncpu); - } else { - - if (cpu == *oncpu) - tick_do_broadcast_on_off(&reason); - else - smp_call_function_single(*oncpu, - tick_do_broadcast_on_off, - &reason, 1, 1); - } - put_cpu(); + else + smp_call_function_single(*oncpu, tick_do_broadcast_on_off, + &reason, 1, 1); } /* @@ -515,11 +512,9 @@ static void tick_broadcast_clear_oneshot(int cpu) */ void tick_broadcast_setup_oneshot(struct clock_event_device *bc) { - if (bc->mode != CLOCK_EVT_MODE_ONESHOT) { - bc->event_handler = tick_handle_oneshot_broadcast; - clockevents_set_mode(bc, CLOCK_EVT_MODE_ONESHOT); - bc->next_event.tv64 = KTIME_MAX; - } + bc->event_handler = tick_handle_oneshot_broadcast; + clockevents_set_mode(bc, CLOCK_EVT_MODE_ONESHOT); + bc->next_event.tv64 = KTIME_MAX; } /* diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c index 77a21abc8716..1bea399a9ef0 100644 --- a/kernel/time/tick-common.c +++ b/kernel/time/tick-common.c @@ -200,7 +200,7 @@ static int tick_check_new_device(struct clock_event_device *newdev) cpu = smp_processor_id(); if (!cpu_isset(cpu, newdev->cpumask)) - goto out; + goto out_bc; td = &per_cpu(tick_cpu_device, cpu); curdev = td->evtdev; @@ -265,7 +265,7 @@ out_bc: */ if (tick_check_broadcast_device(newdev)) ret = NOTIFY_STOP; -out: + spin_unlock_irqrestore(&tick_device_lock, flags); return ret; @@ -345,6 +345,7 @@ static int tick_notify(struct notifier_block *nb, unsigned long reason, case CLOCK_EVT_NOTIFY_BROADCAST_ON: case CLOCK_EVT_NOTIFY_BROADCAST_OFF: + case CLOCK_EVT_NOTIFY_BROADCAST_FORCE: tick_broadcast_on_off(reason, dev); break; diff --git a/kernel/time/tick-sched.c b/kernel/time/tick-sched.c index 637519af6151..10a1347597fd 100644 --- a/kernel/time/tick-sched.c +++ b/kernel/time/tick-sched.c @@ -586,7 +586,7 @@ void tick_setup_sched_timer(void) /* Get the next period (per cpu) */ ts->sched_timer.expires = tick_init_jiffy_update(); offset = ktime_to_ns(tick_period) >> 1; - do_div(offset, NR_CPUS); + do_div(offset, num_possible_cpus()); offset *= smp_processor_id(); ts->sched_timer.expires = ktime_add_ns(ts->sched_timer.expires, offset); diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 4ad79f6bdec6..e5e466b27598 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -24,9 +24,7 @@ * This read-write spinlock protects us from races in SMP while * playing with xtime and avenrun. */ -__attribute__((weak)) __cacheline_aligned_in_smp DEFINE_SEQLOCK(xtime_lock); - -EXPORT_SYMBOL(xtime_lock); +__cacheline_aligned_in_smp DEFINE_SEQLOCK(xtime_lock); /* @@ -47,21 +45,13 @@ EXPORT_SYMBOL(xtime_lock); struct timespec xtime __attribute__ ((aligned (16))); struct timespec wall_to_monotonic __attribute__ ((aligned (16))); static unsigned long total_sleep_time; /* seconds */ -EXPORT_SYMBOL(xtime); - -#ifdef CONFIG_NO_HZ static struct timespec xtime_cache __attribute__ ((aligned (16))); static inline void update_xtime_cache(u64 nsec) { xtime_cache = xtime; timespec_add_ns(&xtime_cache, nsec); } -#else -#define xtime_cache xtime -/* We do *not* want to evaluate the argument for this case */ -#define update_xtime_cache(n) do { } while (0) -#endif static struct clocksource *clock; /* pointer to current clocksource */ |