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Stephen Boyd a272dcca18 tick: broadcast: Check broadcast mode on CPU hotplug ... On ARM systems the dummy clockevent is registered with the cpu hotplug notifier chain before any other per-cpu clockevent. This has the side-effect of causing the dummy clockevent to be registered first in every hotplug sequence. Because the dummy is first, we'll try to turn the broadcast source on but the code in tick_device_uses_broadcast() assumes the broadcast source is in periodic mode and calls tick_broadcast_start_periodic() unconditionally. On boot this isn't a problem because we typically haven't switched into oneshot mode yet (if at all). During hotplug, if the broadcast source isn't in periodic mode we'll replace the broadcast oneshot handler with the broadcast periodic handler and start emulating oneshot mode when we shouldn't. Due to the way the broadcast oneshot handler programs the next_event it's possible for it to contain KTIME_MAX and cause us to hang the system when the periodic handler tries to program the next tick. Fix this by using the appropriate function to start the broadcast source. Reported-by: Stephen Warren <swarren@nvidia.com> Tested-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Cc: Mark Rutland <Mark.Rutland@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: ARM kernel mailing list <linux-arm-kernel@lists.infradead.org> Cc: John Stultz <john.stultz@linaro.org> Cc: Joseph Lo <josephl@nvidia.com> Link: http://lkml.kernel.org/r/20130711140059.GA27430@codeaurora.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>		12 years ago
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Kconfig	Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	12 years ago
Makefile	sched_clock: Make ARM's sched_clock generic for all architectures	12 years ago
alarmtimer.c	alarmtimer: Export symbols of functions declared in linux/alarmtimer.h	12 years ago
clockevents.c	clockevents: Implement unbind functionality	12 years ago
clocksource.c	clocksource: Reselect clocksource when watchdog validated high-res capability	12 years ago
jiffies.c	time: Kill xtime_lock, replacing it with jiffies_lock	12 years ago
ntp.c	ntp: Remove unused variable flags in __hardpps	12 years ago
ntp_internal.h	ntp: Rework do_adjtimex to take timespec and tai arguments	12 years ago
posix-clock.c	kernel: Fix files explicitly needing EXPORT_SYMBOL infrastructure	13 years ago
sched_clock.c	ARM: sched_clock: Load cycle count after epoch stabilizes	12 years ago
tick-broadcast.c	tick: broadcast: Check broadcast mode on CPU hotplug	12 years ago
tick-common.c	tick: Sanitize broadcast control logic	12 years ago
tick-internal.h	clockevents: Define CS_NAME_LEN unconditionally	12 years ago
tick-oneshot.c	clockevents: Make minimum delay adjustments configurable	14 years ago
tick-sched.c	Merge branch 'timers/core' of git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks into timers/urgent	12 years ago
timeconv.c	…
timekeeping.c	Merge branch 'timers/posix-cpu-timers-for-tglx' of	12 years ago
timekeeping_debug.c	power: Add option to log time spent in suspend	12 years ago
timekeeping_internal.h	power: Add option to log time spent in suspend	12 years ago
timer_list.c	timer_list: Convert timer list to be a proper seq_file	12 years ago
timer_stats.c	locking, timer_stats: Annotate table_lock as raw	14 years ago