John Stultz 4eca11dbd2 timekeeping: Avoid taking lock in NMI path with CONFIG_DEBUG_TIMEKEEPING ... commit 27727df240 upstream. When I added some extra sanity checking in timekeeping_get_ns() under CONFIG_DEBUG_TIMEKEEPING, I missed that the NMI safe __ktime_get_fast_ns() method was using timekeeping_get_ns(). Thus the locking added to the debug checks broke the NMI-safety of __ktime_get_fast_ns(). This patch open-codes the timekeeping_get_ns() logic for __ktime_get_fast_ns(), so can avoid any deadlocks in NMI. Fixes: 4ca22c2648 "timekeeping: Add warnings when overflows or underflows are observed" Reported-by: Steven Rostedt <rostedt@goodmis.org> Reported-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: John Stultz <john.stultz@linaro.org> Link: http://lkml.kernel.org/r/1471993702-29148-2-git-send-email-john.stultz@linaro.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2016-09-15 08:27:52 +02:00
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alarmtimer.c
clockevents.c
clocksource.c	clocksource: Allow unregistering the watchdog	2016-09-15 08:27:47 +02:00
hrtimer.c
itimer.c
jiffies.c
Kconfig
Makefile
ntp_internal.h
ntp.c	ntp: Fix ADJ_SETOFFSET being used w/ ADJ_NANO	2016-09-15 08:27:47 +02:00
posix-clock.c
posix-cpu-timers.c
posix-timers.c
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: Cap array access in timekeeping_debug	2016-09-15 08:27:52 +02:00
timekeeping_internal.h
timekeeping.c	timekeeping: Avoid taking lock in NMI path with CONFIG_DEBUG_TIMEKEEPING	2016-09-15 08:27:52 +02:00
timekeeping.h
timer_list.c
timer_stats.c
timer.c