Peter Hilber
be26970980
timekeeping: Fix cross-timestamp interpolation for non-x86
...
[ Upstream commit 14274d0bd31b4debf28284604589f596ad2e99f2 ]
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 18:22:14 -04:00
..
bpf
bpf: Add map and need_defer parameters to .map_fd_put_ptr()
2024-02-23 08:24:57 +01:00
cgroup
cgroup: Remove duplicates in cgroup v1 tasks file
2023-10-25 11:53:19 +02:00
configs
debug
kdb: Fix a potential buffer overflow in kdb_local()
2024-01-25 14:34:32 -08:00
dma
dma-mapping: clear dev->dma_mem to NULL after freeing it
2024-01-25 14:34:25 -08:00
events
perf: Fix the nr_addr_filters fix
2024-02-23 08:25:03 +01:00
gcov
gcov: add support for checksum field
2023-01-18 11:41:42 +01:00
irq
genirq/generic_chip: Make irq_remove_generic_chip() irqdomain aware
2023-11-28 16:50:18 +00:00
livepatch
livepatch: fix race between fork and KLP transition
2022-10-26 13:22:18 +02:00
locking
locking/ww_mutex/test: Fix potential workqueue corruption
2023-11-28 16:50:13 +00:00
power
PM: hibernate: Enforce ordering during image compression/decompression
2024-02-23 08:24:48 +01:00
printk
printk: fix return value of printk.devkmsg __setup handler
2022-04-15 14:18:08 +02:00
rcu
rcu: Suppress smp_processor_id() complaint in synchronize_rcu_expedited_wait()
2023-03-11 16:43:54 +01:00
sched
sched/rt: Disallow writing invalid values to sched_rt_period_us
2024-03-01 13:13:33 +01:00
time
timekeeping: Fix cross-timestamp interpolation for non-x86
2024-03-26 18:22:14 -04:00
trace
tracing: Inform kmemleak of saved_cmdlines allocation
2024-02-23 08:25:13 +01:00
.gitignore
acct.c
acct: fix potential integer overflow in encode_comp_t()
2023-01-18 11:41:34 +01:00
async.c
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
audit.c
audit: Send netlink ACK before setting connection in auditd_set
2024-02-23 08:24:54 +01:00
audit.h
audit: log AUDIT_TIME_* records only from rules
2022-04-15 14:18:04 +02:00
audit_fsnotify.c
audit: fix potential double free on error path from fsnotify_add_inode_mark
2022-09-05 10:27:38 +02:00
audit_tree.c
audit_watch.c
audit: don't WARN_ON_ONCE(!current->mm) in audit_exe_compare()
2023-11-28 16:50:18 +00:00
auditfilter.c
auditsc.c
audit: fix possible soft lockup in __audit_inode_child()
2023-09-23 10:59:46 +02:00
backtracetest.c
treewide: Replace DECLARE_TASKLET() with DECLARE_TASKLET_OLD()
2023-04-20 12:07:32 +02:00
bounds.c
capability.c
compat.c
sched_getaffinity: don't assume 'cpumask_size()' is fully initialized
2023-04-05 11:16:42 +02:00
configs.c
context_tracking.c
cpu.c
hrtimers: Push pending hrtimers away from outgoing CPU earlier
2023-12-13 18:18:09 +01:00
cpu_pm.c
crash_core.c
crash_dump.c
cred.c
cred: switch to using atomic_long_t
2023-12-20 15:41:18 +01:00
delayacct.c
dma.c
exec_domain.c
exit.c
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
extable.c
kernel/extable.c: use address-of operator on section symbols
2023-06-09 10:29:01 +02:00
fail_function.c
kernel/fail_function: fix memory leak with using debugfs_lookup()
2023-03-11 16:44:15 +01:00
fork.c
kernel/fork: beware of __put_task_struct() calling context
2023-09-23 11:00:03 +02:00
freezer.c
futex.c
treewide: Remove uninitialized_var() usage
2023-06-09 10:29:01 +02:00
gen_kheaders.sh
groups.c
hung_task.c
iomem.c
irq_work.c
jump_label.c
kallsyms.c
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c
kexec.c
kexec_core.c
kexec: fix a memory leak in crash_shrink_memory()
2023-07-27 08:37:10 +02:00
kexec_elf.c
kexec_file.c
kexec: support purgatories with .text.hot sections
2023-06-21 15:44:10 +02:00
kexec_internal.h
kheaders.c
kheaders: Use array declaration instead of char
2023-05-17 11:35:33 +02:00
kmod.c
kprobes.c
x86/kprobes: Fix arch_check_optimized_kprobe check within optimized_kprobe range
2023-03-11 16:44:02 +01:00
ksysfs.c
kthread.c
latencytop.c
Makefile
module-internal.h
module.c
modules: only allow symbol_get of EXPORT_SYMBOL_GPL modules
2023-09-23 10:59:36 +02:00
module_signature.c
module_signing.c
notifier.c
nsproxy.c
padata.c
crypto: pcrypt - Fix hungtask for PADATA_RESET
2023-11-28 16:50:14 +00:00
panic.c
exit: Use READ_ONCE() for all oops/warn limit reads
2023-02-06 07:52:50 +01:00
params.c
pid.c
pid_namespace.c
profile.c
profiling: fix shift too large makes kernel panic
2022-08-25 11:18:02 +02:00
ptrace.c
ptrace: Reimplement PTRACE_KILL by always sending SIGKILL
2022-06-14 18:11:24 +02:00
range.c
reboot.c
kernel/reboot: emergency_restart: Set correct system_state
2023-11-28 16:50:19 +00:00
relay.c
relayfs: fix out-of-bounds access in relay_file_read
2023-05-17 11:35:58 +02:00
resource.c
rseq.c
seccomp.c
seccomp: Invalidate seccomp mode to catch death failures
2022-02-16 12:52:53 +01:00
signal.c
signal handling: don't use BUG_ON() for debugging
2022-07-21 20:59:27 +02:00
smp.c
smp: Fix offline cpu check in flush_smp_call_function_queue()
2022-04-20 09:19:39 +02:00
smpboot.c
smpboot.h
softirq.c
stackleak.c
stacktrace.c
stop_machine.c
sys.c
getrusage: use sig->stats_lock rather than lock_task_sighand()
2024-03-15 10:48:19 -04:00
sys_ni.c
kernel/sys_ni: add compat entry for fadvise64_64
2022-09-05 10:27:38 +02:00
sysctl-test.c
sysctl.c
sched/rt: Disallow writing invalid values to sched_rt_period_us
2024-03-01 13:13:33 +01:00
sysctl_binary.c
task_work.c
taskstats.c
test_kprobes.c
torture.c
tracepoint.c
tsacct.c
taskstats: Cleanup the use of task->exit_code
2022-02-23 11:59:57 +01:00
ucount.c
uid16.c
uid16.h
umh.c
up.c
user-return-notifier.c
user.c
user_namespace.c
utsname.c
utsname_sysctl.c
watchdog.c
watchdog: export lockup_detector_reconfigure
2022-08-25 11:18:37 +02:00
watchdog_hld.c
watchdog/perf: more properly prevent false positives with turbo modes
2023-07-27 08:37:10 +02:00
workqueue.c
workqueue: Override implicit ordered attribute in workqueue_apply_unbound_cpumask()
2023-10-25 11:53:18 +02:00
workqueue_internal.h