Peter Zijlstra e2c631ba75 clocksource: Revert "Remove kthread" ... I turns out that the silly spawn kthread from worker was actually needed. clocksource_watchdog_kthread() cannot be called directly from clocksource_watchdog_work(), because clocksource_select() calls timekeeping_notify() which uses stop_machine(). One cannot use stop_machine() from a workqueue() due lock inversions wrt CPU hotplug. Revert the patch but add a comment that explain why we jump through such apparently silly hoops. Fixes: 7197e77abc ("clocksource: Remove kthread") Reported-by: Siegfried Metz <frame@mailbox.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Niklas Cassel <niklas.cassel@linaro.org> Tested-by: Kevin Shanahan <kevin@shanahan.id.au> Tested-by: viktor_jaegerskuepper@freenet.de Tested-by: Siegfried Metz <frame@mailbox.org> Cc: rafael.j.wysocki@intel.com Cc: len.brown@intel.com Cc: diego.viola@gmail.com Cc: rui.zhang@intel.com Cc: bjorn.andersson@linaro.org Link: https://lkml.kernel.org/r/20180905084158.GR24124@hirez.programming.kicks-ass.net		2018-09-06 23:38:35 +02:00
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alarmtimer.c
clockevents.c
clocksource.c	clocksource: Revert "Remove kthread"	2018-09-06 23:38:35 +02:00
hrtimer.c
itimer.c
jiffies.c
Kconfig
Makefile
ntp_internal.h
ntp.c
posix-clock.c
posix-cpu-timers.c
posix-stubs.c
posix-timers.c
posix-timers.h
sched_clock.c
test_udelay.c
tick-broadcast-hrtimer.c
tick-broadcast.c
tick-common.c
tick-internal.h
tick-oneshot.c
tick-sched.c
tick-sched.h
time.c
timeconst.bc
timeconv.c
timecounter.c
timekeeping_debug.c
timekeeping_internal.h
timekeeping.c
timekeeping.h
timer_list.c
timer.c