linux/kernel
Paul E. McKenney a73fc3dcc6 rcu: Clean up after the SRCU-fastification of RCU Tasks Trace
Now that RCU Tasks Trace has been re-implemented in terms of SRCU-fast,
the ->trc_ipi_to_cpu, ->trc_blkd_cpu, ->trc_blkd_node, ->trc_holdout_list,
and ->trc_reader_special task_struct fields are no longer used.

In addition, the rcu_tasks_trace_qs(), rcu_tasks_trace_qs_blkd(),
exit_tasks_rcu_finish_trace(), and rcu_spawn_tasks_trace_kthread(),
show_rcu_tasks_trace_gp_kthread(), rcu_tasks_trace_get_gp_data(),
rcu_tasks_trace_torture_stats_print(), and get_rcu_tasks_trace_gp_kthread()
functions and all the other functions that they invoke are no longer used.

Also, the TRC_NEED_QS and TRC_NEED_QS_CHECKED CPP macros are no longer used.
Neither are the rcu_tasks_trace_lazy_ms and rcu_task_ipi_delay rcupdate
module parameters and the TASKS_TRACE_RCU_READ_MB Kconfig option.

This commit therefore removes all of them.

[ paulmck: Apply Alexei Starovoitov feedback. ]

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: bpf@vger.kernel.org
Reviewed-by: Joel Fernandes <joelagnelf@nvidia.com>
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
2026-01-01 16:39:46 +08:00
..
bpf Some filesystems use a kinda-sorta controlled dentry refcount leak to pin 2025-12-05 14:36:21 -08:00
cgroup Significant patch series in this merge are as follows: 2025-12-05 13:52:43 -08:00
configs
debug
dma dma-mapping fixes for Linux 6.19: 2025-12-11 08:14:23 +09:00
entry
events perf/core: Fix missing read event generation on task exit 2025-12-09 12:22:25 +01:00
futex Futex changes for v6.19: 2025-12-10 17:21:30 +09:00
gcov
irq Misc fixes: 2025-12-14 06:07:09 +12:00
kcsan
livepatch livepatching changes for 6.19 2025-12-03 13:46:48 -08:00
liveupdate mm: memfd_luo: add CONFIG_SHMEM dependency 2025-12-10 16:07:44 -08:00
locking RCU pull request for v6.19 2025-12-03 12:18:07 -08:00
module Significant patch series in this pull request: 2025-12-06 14:01:20 -08:00
power Merge branches 'pm-qos' and 'pm-tools' 2025-11-28 16:50:45 +01:00
printk soc: driver updates for 6.19 2025-12-05 17:29:04 -08:00
rcu rcu: Clean up after the SRCU-fastification of RCU Tasks Trace 2026-01-01 16:39:46 +08:00
sched Miscellaneous scheduler fixes/cleanups: 2025-12-06 12:31:21 -08:00
time soc: driver updates for 6.19 2025-12-05 17:29:04 -08:00
trace tracing fixes for v6.19: 2025-12-06 13:49:40 -08:00
unwind
.gitignore
Kconfig.freezer
Kconfig.hz
Kconfig.kexec liveupdate: kho: move to kernel/liveupdate 2025-11-27 14:24:33 -08:00
Kconfig.locks
Kconfig.preempt
Makefile liveupdate: kho: move to kernel/liveupdate 2025-11-27 14:24:33 -08:00
acct.c
async.c
audit.c
audit.h
audit_fsnotify.c
audit_tree.c
audit_watch.c
auditfilter.c
auditsc.c
backtracetest.c
bounds.c x86/asm: Remove ANNOTATE_DATA_SPECIAL usage 2025-12-03 16:53:19 +01:00
capability.c
cfi.c
compat.c
configs.c
context_tracking.c context_tracking: Remove rcu_task_trace_heavyweight_{enter,exit}() 2026-01-01 16:39:46 +08:00
cpu.c cpu: Make atomic hotplug callbacks run with interrupts disabled on UP 2025-12-10 15:49:11 +09:00
cpu_pm.c
crash_core.c crash: fix crashkernel resource shrink 2025-11-15 10:52:01 -08:00
crash_core_test.c
crash_dump_dm_crypt.c
crash_reserve.c
cred.c kernel-6.19-rc1.cred 2025-12-01 13:45:41 -08:00
delayacct.c
dma.c
elfcorehdr.c
exec_domain.c
exit.c Significant patch series in this pull request: 2025-12-06 14:01:20 -08:00
exit.h
extable.c
fail_function.c
fork.c rcu: Clean up after the SRCU-fastification of RCU Tasks Trace 2026-01-01 16:39:46 +08:00
freezer.c
gen_kheaders.sh
groups.c
hung_task.c hung_task: add hung_task_sys_info sysctl to dump sys info on task-hung 2025-11-20 14:03:43 -08:00
iomem.c
irq_work.c
jump_label.c
kallsyms.c kallsyms: Fix wrong "big" kernel symbol type read from procfs 2025-11-24 16:56:24 +01:00
kallsyms_internal.h
kallsyms_selftest.c
kallsyms_selftest.h
kcmp.c
kcov.c
kexec.c
kexec_core.c kexec: move sysfs entries to /sys/kernel/kexec 2025-11-27 14:24:42 -08:00
kexec_elf.c
kexec_file.c
kexec_internal.h
kheaders.c
kprobes.c
kstack_erase.c sysctl: remove __user qualifier from stack_erasing_sysctl buffer argument 2025-11-27 15:44:53 +01:00
ksyms_common.c
ksysfs.c kexec: move sysfs entries to /sys/kernel/kexec 2025-11-27 14:24:42 -08:00
kthread.c
latencytop.c
module_signature.c
notifier.c
nscommon.c
nsproxy.c nsproxy: fix free_nsproxy() and simplify create_new_namespaces() 2025-11-14 13:10:38 +01:00
nstree.c nstree: fix kernel-doc comments for internal functions 2025-11-14 13:10:38 +01:00
padata.c
panic.c Significant patch series in this pull request: 2025-12-06 14:01:20 -08:00
params.c
pid.c
pid_namespace.c
pid_sysctl.h
profile.c
ptrace.c
range.c
reboot.c
regset.c
relay.c relay: update relay to use mmap_prepare 2025-11-16 17:28:11 -08:00
resource.c Reinstate "resource: avoid unnecessary lookups in find_next_iomem_res()" 2025-11-27 14:24:45 -08:00
resource_kunit.c
rseq.c
scftorture.c
scs.c
seccomp.c
signal.c signal: Move MMCID exit out of sighand lock 2025-11-25 19:45:40 +01:00
smp.c smp: Introduce a helper function to check for pending IPIs 2025-11-19 18:06:50 +01:00
smpboot.c
smpboot.h
softirq.c
stacktrace.c
static_call.c
static_call_inline.c
stop_machine.c
sys.c
sys_ni.c
sysctl-test.c
sysctl.c sysctl: Wrap do_proc_douintvec with the public function proc_douintvec_conv 2025-11-27 15:45:38 +01:00
task_work.c
taskstats.c
torture.c
tracepoint.c
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c
up.c
user-return-notifier.c
user.c
user_namespace.c
utsname.c
utsname_sysctl.c
vhost_task.c
vmcore_info.c vmcoreinfo: track and log recoverable hardware errors 2025-11-27 14:24:44 -08:00
watch_queue.c watch_queue: Use local kmap in post_one_notification() 2025-11-19 12:17:28 +01:00
watchdog.c Significant patch series in this pull request: 2025-12-06 14:01:20 -08:00
watchdog_buddy.c
watchdog_perf.c
workqueue.c workqueue: Don't rely on wq->rescuer to stop rescuer 2025-11-21 09:45:36 -10:00
workqueue_internal.h