torvalds/linux
torvalds/linux
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mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-09-04 20:19:47 +08:00
Code
9cb1547891
linux/kernel/time
History
Sebastian Andrzej Siewior 92e250c624 timekeeping: Add a lockdep override in tick_freeze() 
tick_freeze() acquires a raw spinlock (tick_freeze_lock). Later in the
callchain (timekeeping_suspend() -> mc146818_avoid_UIP()) the RTC driver
acquires a spinlock which becomes a sleeping lock on PREEMPT_RT.  Lockdep
complains about this lock nesting.

Add a lockdep override for this special case and a comment explaining
why it is okay.

Reported-by: Borislav Petkov <bp@alien8.de>
Reported-by: Chris Bainbridge <chris.bainbridge@gmail.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/20250404133429.pnAzf-eF@linutronix.de
Closes: https://lore.kernel.org/all/20250330113202.GAZ-krsjAnurOlTcp-@fat_crate.local/
Closes: https://lore.kernel.org/all/CAP-bSRZ0CWyZZsMtx046YV8L28LhY0fson2g4EqcwRAVN1Jk+Q@mail.gmail.com/
2025-04-09 22:30:39 +02:00
..
alarmtimer.c alarmtimer: Switch to use hrtimer_setup() and hrtimer_setup_on_stack() 2024-11-07 02:47:07 +01:00
clockevents.c clockevents: Shutdown and unregister current clockevents at CPUHP_AP_TICK_DYING 2024-10-31 10:41:42 +01:00
clocksource-wdtest.c clocksource/wdtest: Print time values for short udelay(1) 2025-01-15 19:49:13 +01:00
clocksource.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
hrtimer.c hrtimer: Add missing ACCESS_PRIVATE() for hrtimer::function 2025-04-09 21:00:42 +02:00
itimer.c signal: Confine POSIX_TIMERS properly 2024-10-29 11:43:18 +01:00
jiffies.c clocksource: Make clocksource watchdog test safe for slow-HZ systems 2021-08-28 17:01:32 +02:00
Kconfig timekeeping: Always check for negative motion 2024-11-02 10:14:31 +01:00
Makefile tracing: Disable branch profiling in noinstr code 2025-03-22 09:49:26 +01:00
namespace.c vdso: Rework struct vdso_time_data and introduce struct vdso_clock 2025-03-08 14:37:41 +01:00
ntp_internal.h ntp: Make sure RTC is synchronized when time goes backwards 2024-09-10 13:50:40 +02:00
ntp.c time: Switch to hrtimer_setup() 2025-02-18 10:32:33 +01:00
posix-clock.c Networking changes for 6.15. 2025-03-26 21:48:21 -07:00
posix-cpu-timers.c posix-timers: Cleanup SIG_IGN workaround leftovers 2024-11-07 02:14:45 +01:00
posix-stubs.c posix-timers: Get rid of [COMPAT_]SYS_NI() uses 2023-12-20 21:30:27 -08:00
posix-timers.c A treewide hrtimer timer cleanup 2025-03-25 10:54:15 -07:00
posix-timers.h posix-timers: Cleanup SIG_IGN workaround leftovers 2024-11-07 02:14:45 +01:00
sched_clock.c time: Switch to hrtimer_setup() 2025-02-18 10:32:33 +01:00
sleep_timeout.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
test_udelay.c time: Add MODULE_DESCRIPTION() to time test modules 2024-06-03 11:18:50 +02:00
tick-broadcast-hrtimer.c time: Switch to hrtimer_setup() 2025-02-18 10:32:33 +01:00
tick-broadcast.c tick/broadcast: Add kernel-doc for function parameters 2025-01-15 19:49:14 +01:00
tick-common.c timekeeping: Add a lockdep override in tick_freeze() 2025-04-09 22:30:39 +02:00
tick-internal.h clockevents: Shutdown and unregister current clockevents at CPUHP_AP_TICK_DYING 2024-10-31 10:41:42 +01:00
tick-legacy.c timekeeping: remove xtime_update 2020-10-30 21:57:07 +01:00
tick-oneshot.c time: Fix various kernel-doc problems 2023-01-03 11:07:58 +01:00
tick-sched.c time: Switch to hrtimer_setup() 2025-02-18 10:32:33 +01:00
tick-sched.h tick/sched: Fix struct tick_sched doc warnings 2024-04-01 10:36:35 +02:00
time_test.c time: Add MODULE_DESCRIPTION() to time test modules 2024-06-03 11:18:50 +02:00
time.c time: Fix references to _msecs_to_jiffies() handling of values 2024-10-25 19:50:10 +02:00
timeconst.bc
timeconv.c time: Improve performance of time64_to_tm() 2021-06-24 11:51:59 +02:00
timecounter.c time/timecounter: Mark 1st argument of timecounter_cyc2time() as const 2021-04-16 21:03:50 +02:00
timekeeping_debug.c timekeeping: Add percpu counter for tracking floor swap events 2024-10-10 10:20:46 +02:00
timekeeping_internal.h clocksource: Make negative motion detection more robust 2024-12-05 16:03:24 +01:00
timekeeping.c Revert "timekeeping: Fix possible inconsistencies in _COARSE clockids" 2025-04-04 19:10:00 +02:00
timekeeping.h asm-generic: cross-architecture timer cleanup 2020-12-16 00:07:17 -08:00
timer_list.c hrtimers: Make callback function pointer private 2025-04-05 10:30:17 +02:00
timer_migration.c timers/migration: Fix off-by-one root mis-connection 2025-02-07 09:02:16 +01:00
timer_migration.h timer/migration: Fix kernel-doc warnings for union tmigr_state 2025-01-15 19:49:14 +01:00
timer.c treewide: Switch/rename to timer_delete[_sync]() 2025-04-05 10:30:12 +02:00
vsyscall.c vdso: Rework struct vdso_time_data and introduce struct vdso_clock 2025-03-08 14:37:41 +01:00