Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Rafael J. Wysocki 89737f6520 cpufreq/sched: Explicitly synchronize limits_changed flag handling ... [ Upstream commit 79443a7e9da3c9f68290a8653837e23aba0fa89f ] The handling of the limits_changed flag in struct sugov_policy needs to be explicitly synchronized to ensure that cpufreq policy limits updates will not be missed in some cases. Without that synchronization it is theoretically possible that the limits_changed update in sugov_should_update_freq() will be reordered with respect to the reads of the policy limits in cpufreq_driver_resolve_freq() and in that case, if the limits_changed update in sugov_limits() clobbers the one in sugov_should_update_freq(), the new policy limits may not take effect for a long time. Likewise, the limits_changed update in sugov_limits() may theoretically get reordered with respect to the updates of the policy limits in cpufreq_set_policy() and if sugov_should_update_freq() runs between them, the policy limits change may be missed. To ensure that the above situations will not take place, add memory barriers preventing the reordering in question from taking place and add READ_ONCE() and WRITE_ONCE() annotations around all of the limits_changed flag updates to prevent the compiler from messing up with that code. Fixes: 600f5badb7 ("cpufreq: schedutil: Don't skip freq update when limits change") Cc: 5.3+ <stable@vger.kernel.org> # 5.3+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Christian Loehle <christian.loehle@arm.com> Link: https://patch.msgid.link/3376719.44csPzL39Z@rjwysocki.net [ Adjust context ] Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2025-09-09 18:44:00 +02:00
..
bpf	bpf: fix potential error return	2025-01-09 13:23:36 +01:00
cgroup	cgroup: Fix compilation issue due to cgroup_mutex not being exported	2025-06-04 14:32:29 +02:00
configs
debug	kdb: Use the passed prompt in kdb_position_cursor()	2024-08-19 05:33:40 +02:00
dma	dma: fix call order in dmam_free_coherent	2024-08-19 05:33:41 +02:00
events	perf/core: Prevent VMA split of buffer mappings	2025-08-28 16:21:23 +02:00
gcov	gcov: add support for GCC 14	2024-07-05 09:08:24 +02:00
irq	genirq/irqdesc: Honor caller provided affinity in alloc_desc()	2024-08-19 05:33:52 +02:00
livepatch	livepatch: fix race between fork and KLP transition	2022-10-26 13:22:18 +02:00
locking	locking/lockdep: Decrease nr_unused_locks if lock unused in zap_class()	2025-05-02 07:39:15 +02:00
power	PM: sleep: console: Fix the black screen issue	2025-08-28 16:21:25 +02:00
printk	printk: Fix signed integer overflow when defining LOG_BUF_LEN_MAX	2025-03-13 12:43:02 +01:00
rcu	rcu: Protect ->defer_qs_iw_pending from data race	2025-08-28 16:21:26 +02:00
sched	cpufreq/sched: Explicitly synchronize limits_changed flag handling	2025-09-09 18:44:00 +02:00
time	posix-cpu-timers: fix race between handle_posix_cpu_timers() and posix_cpu_timer_del()	2025-06-27 11:02:57 +01:00
trace	ftrace: Fix potential warning in trace_printk_seq during ftrace_dump	2025-09-04 14:05:53 +02:00
.gitignore
acct.c	acct: perform last write from workqueue	2025-03-13 12:43:26 +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	bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS	2024-05-02 16:18:37 +02:00
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: Handle CPU state correctly on hotplug	2025-02-01 18:18:51 +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	perf: Fix sample vs do_exit()	2025-06-27 11:02:58 +01:00
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	mm: drop the assumption that VM_SHARED always implies writable	2025-08-28 16:21:36 +02:00
freezer.c
futex.c	treewide: Remove uninitialized_var() usage	2023-06-09 10:29:01 +02:00
gen_kheaders.sh	kheaders: Ignore silly-rename files	2025-02-01 18:18:51 +01:00
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: initialize ELF lowest address to ULONG_MAX	2025-04-10 14:29:41 +02:00
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	kprobes: Fix possible use-after-free issue on kprobe registration	2024-05-02 16:18:30 +02:00
ksysfs.c
kthread.c	kthread: fix task state in kthread worker if being frozen	2024-11-08 16:20:30 +01:00
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	padata: fix sysfs store callback check	2025-03-13 12:42:56 +01:00
panic.c	panic: Flush kernel log buffer at the end	2024-04-13 12:51:37 +02:00
params.c	module: ensure that kobject_put() is safe for module type kobjects	2025-06-04 14:32:27 +02:00
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	resource: fix region_intersects() vs add_memory_driver_managed()	2024-11-08 16:20:46 +01:00
rseq.c
seccomp.c	seccomp: Invalidate seccomp mode to catch death failures	2022-02-16 12:52:53 +01:00
signal.c	signal: Replace BUG_ON()s	2024-11-08 16:20:38 +01:00
smp.c	smp: Add missing destroy_work_on_stack() call in smp_call_on_cpu()	2024-09-12 11:03:54 +02:00
smpboot.c
smpboot.h
softirq.c	tasklet: Introduce new initialization API	2025-03-13 12:43:04 +01:00
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: properly initialize the turbo mode timestamp and rearm counter	2024-08-19 05:33:39 +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