Thomas Gleixner 9d9e522010 posix-timers: Prevent RT livelock in itimer_delete() ... itimer_delete() has a retry loop when the timer is concurrently expired. On non-RT kernels this just spin-waits until the timer callback has completed, except for posix CPU timers which have HAVE_POSIX_CPU_TIMERS_TASK_WORK enabled. In that case and on RT kernels the existing task could live lock when preempting the task which does the timer delivery. Replace spin_unlock() with an invocation of timer_wait_running() to handle it the same way as the other retry loops in the posix timer code. Fixes: ec8f954a40 ("posix-timers: Use a callback for cancel synchronization on PREEMPT_RT") Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Frederic Weisbecker <frederic@kernel.org> Link: https://lore.kernel.org/r/87v8g7c50d.ffs@tglx		2023-06-18 22:40:42 +02:00
..
alarmtimer.c	driver core: class: remove struct class_interface * from callbacks	2023-04-03 21:42:52 +02:00
clockevents.c	clockevents: Repair kernel-doc for clockevent_delta2ns()	2022-12-01 13:35:41 +01:00
clocksource-wdtest.c	clocksource: Make clocksource watchdog test safe for slow-HZ systems	2021-08-28 17:01:32 +02:00
clocksource.c	clocksource: Suspend the watchdog temporarily when high read latency detected	2023-01-24 15:12:48 -08:00
hrtimer.c	hrtimer: Ignore slack time for RT tasks in schedule_hrtimeout_range()	2023-01-31 11:23:07 +01:00
itimer.c	time: Prevent undefined behaviour in timespec64_to_ns()	2020-10-26 11:48:11 +01:00
jiffies.c	clocksource: Make clocksource watchdog test safe for slow-HZ systems	2021-08-28 17:01:32 +02:00
Kconfig	clocksource: Loosen clocksource watchdog constraints	2023-01-03 20:43:45 -08:00
Makefile	time: Improve performance of time64_to_tm()	2021-06-24 11:51:59 +02:00
namespace.c	vdso/timens: Refactor copy-pasted find_timens_vvar_page() helper into one copy	2022-12-01 11:35:40 +01:00
ntp_internal.h	ntp: Make the RTC synchronization more reliable	2020-12-11 10:40:52 +01:00
ntp.c	timekeeping, clocksource: Fix various typos in comments	2021-03-22 23:06:48 +01:00
posix-clock.c	posix-clocks: Rename the clock_get() callback to clock_get_timespec()	2020-01-14 12:20:49 +01:00
posix-cpu-timers.c	posix-cpu-timers: Implement the missing timer_wait_running callback	2023-04-21 15:34:33 +02:00
posix-stubs.c	timers: Prevent union confusion from unexpected restart_syscall()	2023-01-11 19:31:47 +01:00
posix-timers.c	posix-timers: Prevent RT livelock in itimer_delete()	2023-06-18 22:40:42 +02:00
posix-timers.h	posix-clocks: Introduce clock_get_ktime() callback	2020-01-14 12:20:51 +01:00
sched_clock.c	time/sched_clock: Fix formatting of frequency reporting code	2022-05-02 14:29:04 +02:00
test_udelay.c	time/debug: Fix memory leak with using debugfs_lookup()	2023-02-09 20:12:27 +01:00
tick-broadcast-hrtimer.c	time/tick-broadcast: Remove RCU_NONIDLE() usage	2023-01-13 11:48:16 +01:00
tick-broadcast.c	tick/broadcast: Make broadcast device replacement work correctly	2023-05-08 23:18:16 +02:00
tick-common.c	tick/common: Align tick period with the HZ tick.	2023-04-18 15:06:50 +02:00
tick-internal.h	clocksource: Make clocksource watchdog test safe for slow-HZ systems	2021-08-28 17:01:32 +02:00
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	Timers and timekeeping updates:	2023-04-25 11:22:46 -07:00
tick-sched.h	timers/nohz: Protect idle/iowait sleep time under seqcount	2023-04-18 16:35:12 +02:00
time_test.c	time/kunit: Add missing MODULE_LICENSE()	2021-06-28 07:40:23 +02:00
time.c	time: Fix various kernel-doc problems	2023-01-03 11:07:58 +01:00
timeconst.bc	time: Add SPDX license identifiers	2018-11-23 11:51:20 +01:00
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/debug: No need to check return value of debugfs_create functions	2019-01-29 20:08:41 +01:00
timekeeping_internal.h	timekeeping/vsyscall: Provide vdso_update_begin/end()	2020-08-06 10:57:30 +02:00
timekeeping.c	timekeeping: Fix references to nonexistent ktime_get_fast_ns()	2023-04-26 23:43:16 +02:00
timekeeping.h	asm-generic: cross-architecture timer cleanup	2020-12-16 00:07:17 -08:00
timer_list.c	timer_list: Print name of per-cpu wakeup device	2021-05-31 17:04:49 +02:00
timer.c	timers: Provide timer_shutdown[_sync]()	2022-11-24 15:09:12 +01:00
vsyscall.c	timekeeping, clocksource: Fix various typos in comments	2021-03-22 23:06:48 +01:00