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rockchip-kernel/kernel
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Sebastian Andrzej Siewior dc18c5b130 timekeeping: Add a lockdep override in tick_freeze() 
[ Upstream commit 92e250c624ea37fde64bfd624fd2556f0d846f18 ]

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/
Signed-off-by: Sasha Levin <sashal@kernel.org>
2025-05-02 07:51:00 +02:00
..
bpf
bpf: Reject attaching fexit/fmod_ret to __noreturn functions
2025-05-02 07:50:53 +02:00
cgroup
cgroup: fix race between fork and cgroup.kill
2025-02-21 13:57:17 +01:00
configs
Merge tag 'kbuild-v6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
2023-09-05 11:01:47 -07:00
debug
kdb: Use the passed prompt in kdb_position_cursor()
2024-08-03 08:54:34 +02:00
dma
dma/contiguous: avoid warning about unused size_bytes
2025-05-02 07:50:42 +02:00
entry
entry: Respect changes to system call number by trace_sys_enter()
2024-04-03 15:28:50 +02:00
events
perf/core: Fix WARN_ON(!ctx) in __free_event() for partial init
2025-05-02 07:50:58 +02:00
futex
futex: Don't include process MM in futex key on no-MMU
2023-11-20 11:58:53 +01:00
gcov
gcov: add support for GCC 14
2024-06-27 13:49:13 +02:00
irq
genirq: Make handle_enforce_irqctx() unconditionally available
2025-02-08 09:51:48 +01:00
kcsan
kcsan: Turn report_filterlist_lock into a raw_spinlock
2024-12-14 19:59:59 +01:00
livepatch
livepatch: Fix missing newline character in klp_resolve_symbols()
2023-11-20 11:59:25 +01:00
locking
locking/lockdep: Decrease nr_unused_locks if lock unused in zap_class()
2025-04-25 10:45:29 +02:00
module
module: sign with sha512 instead of sha1 by default
2025-05-02 07:50:36 +02:00
power
PM: hibernate: Add error handling for syscore_suspend()
2025-02-08 09:52:29 +01:00
printk
printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX
2025-02-17 09:40:04 +01:00
rcu
rcuscale: Do a proper cleanup if kfree_scale_init() fails
2024-12-09 10:31:50 +01:00
sched
cpufreq/sched: Explicitly synchronize limits_changed flag handling
2025-05-02 07:50:41 +02:00
time
timekeeping: Add a lockdep override in tick_freeze()
2025-05-02 07:51:00 +02:00
trace
bpf: Fix deadlock between rcu_tasks_trace and event_mutex.
2025-05-02 07:50:52 +02:00
.gitignore
…
acct.c
acct: block access to kernel internal filesystems
2025-02-27 04:10:52 -08:00
async.c
async: Introduce async_schedule_dev_nocall()
2024-01-31 16:18:49 -08:00
audit_fsnotify.c
…
audit_tree.c
…
audit_watch.c
audit: don't WARN_ON_ONCE(!current->mm) in audit_exe_compare()
2023-11-28 17:19:56 +00:00
audit.c
audit: Send netlink ACK before setting connection in auditd_set
2024-02-05 20:14:14 +00:00
audit.h
audit: correct audit_filter_inodes() definition
2023-07-21 12:17:25 -04:00
auditfilter.c
ima: Avoid blocking in RCU read-side critical section
2024-07-11 12:49:18 +02:00
auditsc.c
audit,io_uring: io_uring openat triggers audit reference count underflow
2023-10-13 18:34:46 +02:00
backtracetest.c
…
bounds.c
bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS
2024-05-02 16:32:50 +02:00
capability.c
lsm: constify the 'target' parameter in security_capget()
2023-08-08 16:48:47 -04:00
cfi.c
…
compat.c
…
configs.c
…
context_tracking.c
locking/atomic: treewide: use raw_atomic*_<op>()
2023-06-05 09:57:20 +02:00
cpu_pm.c
…
cpu.c
hrtimers: Handle CPU state correctly on hotplug
2025-01-23 17:21:17 +01:00
crash_core.c
mm: turn folio_test_hugetlb into a PageType
2024-05-02 16:32:47 +02:00
crash_dump.c
…
cred.c
cred: get rid of CONFIG_DEBUG_CREDENTIALS
2023-12-20 17:01:51 +01:00
delayacct.c
…
dma.c
…
exec_domain.c
…
exit.c
mm: optimize the redundant loop of mm_update_owner_next()
2024-07-11 12:49:15 +02:00
extable.c
…
fail_function.c
…
fork.c
x86/mm/pat: Fix VM_PAT handling when fork() fails in copy_page_range()
2025-04-10 14:37:30 +02:00
freezer.c
…
gen_kheaders.sh
kheaders: Ignore silly-rename files
2025-01-23 17:21:13 +01:00
groups.c
…
hung_task.c
…
iomem.c
kernel/iomem.c: remove __weak ioremap_cache helper
2023-08-21 13:37:28 -07:00
irq_work.c
…
jump_label.c
jump_label: Fix static_key_slow_dec() yet again
2024-10-10 11:57:13 +02:00
kallsyms_internal.h
…
kallsyms_selftest.c
Merge tag 'modules-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux
2023-08-29 17:32:32 -07:00
kallsyms_selftest.h
…
kallsyms.c
kallsyms: Change func signature for cleanup_symbol_name()
2023-08-25 15:00:36 -07:00
kcmp.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.kexec
kexec: select CRYPTO from KEXEC_FILE instead of depending on it
2024-01-05 15:19:41 +01:00
Kconfig.locks
…
Kconfig.preempt
…
kcov.c
kcov: mark in_softirq_really() as __always_inline
2025-01-09 13:32:07 +01:00
kexec_core.c
kexec: do syscore_shutdown() in kernel_kexec
2024-01-31 16:18:56 -08:00
kexec_elf.c
kexec: initialize ELF lowest address to ULONG_MAX
2025-04-10 14:37:34 +02:00
kexec_file.c
kexec_file: fix elfcorehdr digest exclusion when CONFIG_CRASH_HOTPLUG=y
2024-09-12 11:11:27 +02:00
kexec_internal.h
…
kexec.c
kernel: kexec: copy user-array safely
2023-11-28 17:19:40 +00:00
kheaders.c
…
kprobes.c
kprobes: Fix to check symbol prefixes correctly
2024-08-14 13:58:51 +02:00
ksyms_common.c
kallsyms: make kallsyms_show_value() as generic function
2023-06-08 12:27:20 -07:00
ksysfs.c
crash: hotplug support for kexec_load()
2023-08-24 16:25:14 -07:00
kthread.c
kthread: unpark only parked kthread
2024-10-17 15:24:37 +02:00
latencytop.c
…
Makefile
kernel/numa.c: Move logging out of numa.h
2024-06-12 11:11:50 +02:00
module_signature.c
…
notifier.c
…
nsproxy.c
nsproxy: Convert nsproxy.count to refcount_t
2023-08-21 11:29:12 -07:00
numa.c
kernel/numa.c: Move logging out of numa.h
2024-06-12 11:11:50 +02:00
padata.c
padata: avoid UAF for reorder_work
2025-02-08 09:52:09 +01:00
panic.c
objtool, panic: Disable SMAP in __stack_chk_fail()
2025-05-02 07:50:55 +02:00
params.c
kernel: params: Remove unnecessary ‘0’ values from err
2023-07-10 12:47:01 -07:00
pid_namespace.c
zap_pid_ns_processes: clear TIF_NOTIFY_SIGNAL along with TIF_SIGPENDING
2024-06-21 14:38:50 +02:00
pid_sysctl.h
memfd: replace ratcheting feature from vm.memfd_noexec with hierarchy
2023-08-21 13:37:59 -07:00
pid.c
pidfd: prevent a kernel-doc warning
2023-09-19 13:21:33 -07:00
profile.c
profiling: remove profile=sleep support
2024-08-14 13:58:47 +02:00
ptrace.c
…
range.c
…
reboot.c
kernel/reboot: emergency_restart: Set correct system_state
2023-11-28 17:20:04 +00:00
regset.c
…
relay.c
kernel: relay: remove unnecessary NULL values from relay_open_buf
2023-08-18 10:18:55 -07:00
resource_kunit.c
…
resource.c
resource: fix region_intersects() vs add_memory_driver_managed()
2024-10-10 11:57:50 +02:00
rseq.c
…
scftorture.c
scftorture: Pause testing after memory-allocation failure
2023-07-14 15:02:57 -07:00
scs.c
…
seccomp.c
seccomp: Add missing kerndoc notations
2023-08-17 12:32:15 -07:00
signal.c
posix-timers: Target group sigqueue to current task only if not exiting
2024-12-09 10:33:11 +01:00
smp.c
smp: Add missing destroy_work_on_stack() call in smp_call_on_cpu()
2024-09-12 11:11:37 +02:00
smpboot.c
kthread: add kthread_stop_put
2024-06-12 11:12:52 +02:00
smpboot.h
…
softirq.c
softirq: Allow raising SCHED_SOFTIRQ from SMP-call-function on RT kernel
2025-01-09 13:31:48 +01:00
stackleak.c
…
stacktrace.c
…
static_call_inline.c
x86/static-call: provide a way to do very early static-call updates
2024-12-19 18:11:36 +01:00
static_call.c
…
stop_machine.c
…
sys_ni.c
syscalls: fix compat_sys_io_pgetevents_time64 usage
2024-07-05 09:34:04 +02:00
sys.c
hrtimer: Use and report correct timerslack values for realtime tasks
2025-03-22 12:50:37 -07:00
sysctl-test.c
…
sysctl.c
Merge tag 'v6.5-rc1-sysctl-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux
2023-06-28 16:05:21 -07:00
task_work.c
task_work: make TWA_NMI_CURRENT handling conditional on IRQ_WORK
2024-11-01 01:58:34 +01:00
taskstats.c
…
torture.c
rcutorture: Fix stuttering races and other issues
2023-11-28 17:20:08 +00:00
tracepoint.c
…
tsacct.c
…
ucount.c
ucounts: fix counter leak in inc_rlimit_get_ucounts()
2024-11-14 13:19:40 +01:00
uid16.c
…
uid16.h
…
umh.c
sysctl: fix unused proc_cap_handler() function warning
2023-06-29 15:19:43 -07:00
up.c
…
user_namespace.c
…
user-return-notifier.c
…
user.c
…
usermode_driver.c
…
utsname_sysctl.c
…
utsname.c
…
vhost_task.c
vhost_task: Handle SIGKILL by flushing work and exiting
2024-07-11 12:49:10 +02:00
watch_queue.c
watch_queue: fix pipe accounting mismatch
2025-04-10 14:37:25 +02:00
watchdog_buddy.c
watchdog/hardlockup: move SMP barriers from common code to buddy code
2023-06-19 16:25:28 -07:00
watchdog_perf.c
watchdog/perf: properly initialize the turbo mode timestamp and rearm counter
2024-08-03 08:54:29 +02:00
watchdog.c
watchdog: move softlockup_panic back to early_param
2023-11-28 17:19:57 +00:00
workqueue_internal.h
workqueue: Drop the special locking rule for worker->flags and worker_pool->flags
2023-08-07 15:57:22 -10:00
workqueue.c
workqueue: Do not warn when cancelling WQ_MEM_RECLAIM work from !WQ_MEM_RECLAIM worker
2025-01-17 13:36:25 +01:00