Peter Hilber 9388721260 timekeeping: Fix cross-timestamp interpolation for non-x86 ... [ Upstream commit 14274d0bd3 ] So far, get_device_system_crosststamp() unconditionally passes system_counterval.cycles to timekeeping_cycles_to_ns(). But when interpolating system time (do_interp == true), system_counterval.cycles is before tkr_mono.cycle_last, contrary to the timekeeping_cycles_to_ns() expectations. On x86, CONFIG_CLOCKSOURCE_VALIDATE_LAST_CYCLE will mitigate on interpolating, setting delta to 0. With delta == 0, xtstamp->sys_monoraw and xtstamp->sys_realtime are then set to the last update time, as implicitly expected by adjust_historical_crosststamp(). On other architectures, the resulting nonsense xtstamp->sys_monoraw and xtstamp->sys_realtime corrupt the xtstamp (ts) adjustment in adjust_historical_crosststamp(). Fix this by deriving xtstamp->sys_monoraw and xtstamp->sys_realtime from the last update time when interpolating, by using the local variable "cycles". The local variable already has the right value when interpolating, unlike system_counterval.cycles. Fixes: 2c756feb18 ("time: Add history to cross timestamp interface supporting slower devices") Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: John Stultz <jstultz@google.com> Link: https://lore.kernel.org/r/20231218073849.35294-4-peter.hilber@opensynergy.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-03-26 18:20:29 -04:00
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alarmtimer.c	alarmtimer: Prevent starvation by small intervals and SIG_IGN	2023-02-22 12:59:55 +01:00
clockevents.c
clocksource-wdtest.c
clocksource.c	clocksource: Skip watchdog check for large watchdog intervals	2024-02-16 19:06:31 +01:00
hrtimer.c	hrtimer: Ignore slack time for RT tasks in schedule_hrtimeout_range()	2024-02-23 09:12:50 +01:00
itimer.c
jiffies.c
Kconfig
Makefile
namespace.c
ntp.c
ntp_internal.h
posix-clock.c
posix-cpu-timers.c	posix-cpu-timers: Implement the missing timer_wait_running callback	2023-05-11 23:03:00 +09:00
posix-stubs.c	timers: Prevent union confusion from unexpected restart_syscall()	2023-03-10 09:33:49 +01:00
posix-timers.c	posix-timers: Prevent RT livelock in itimer_delete()	2023-07-19 16:20:59 +02:00
posix-timers.h
sched_clock.c
test_udelay.c	time/debug: Fix memory leak with using debugfs_lookup()	2023-03-10 09:33:52 +01:00
tick-broadcast-hrtimer.c
tick-broadcast.c	tick/broadcast: Make broadcast device replacement work correctly	2023-05-24 17:32:31 +01:00
tick-common.c	tick/common: Align tick period during sched_timer setup	2023-06-28 11:12:18 +02:00
tick-internal.h
tick-legacy.c
tick-oneshot.c
tick-sched.c	tick/sched: Preserve number of idle sleeps across CPU hotplug events	2024-01-31 16:17:12 -08:00
tick-sched.h
time.c	time: Correct the prototype of ns_to_kernel_old_timeval and ns_to_timespec64	2022-08-09 20:02:13 +02:00
time_test.c	time: test: Fix incorrect format specifier	2024-03-26 18:20:29 -04:00
timeconst.bc
timeconv.c
timecounter.c
timekeeping.c	timekeeping: Fix cross-timestamp interpolation for non-x86	2024-03-26 18:20:29 -04:00
timekeeping.h
timekeeping_debug.c
timekeeping_internal.h
timer.c
timer_list.c
vsyscall.c