Uros Bizjak 9a15193e23 smpboot: use atomic_try_cmpxchg in cpu_wait_death and cpu_report_death ...

Use atomic_try_cmpxchg instead of atomic_cmpxchg (*ptr, old, new) == old
in cpu_wait_death and cpu_report_death.  x86 CMPXCHG instruction returns
success in ZF flag, so this change saves a compare after cmpxchg (and
related move instruction in front of cmpxchg).  Also, atomic_try_cmpxchg
implicitly assigns old *ptr value to "old" when cmpxchg fails, enabling
further code simplifications.

No functional change intended.

Link: https://lkml.kernel.org/r/20220825145603.5811-1-ubizjak@gmail.com
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

2022-09-11 21:55:10 -07:00

..

bpf

net: Fix suspicious RCU usage in bpf_sk_reuseport_detach()

2022-08-17 16:42:59 -07:00

cgroup

cgroup: Add missing cpus_read_lock() to cgroup_attach_task_all()

2022-08-25 07:36:30 -10:00

configs

Merge tag 'for-linus-6.0-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

2022-08-14 09:28:54 -07:00

debug

Merge tag 'modules-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux

2022-05-26 17:13:43 -07:00

dma

Merge tag 'rproc-v5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/remoteproc/linux

2022-08-08 15:16:29 -07:00

entry

context_tracking: Take NMI eqs entrypoints over RCU

2022-07-05 13:32:59 -07:00

events

Merge tag 'perf-urgent-2022-08-06' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2022-08-06 17:28:12 -07:00

futex

Merge tag 'drm-next-2022-05-25' of git://anongit.freedesktop.org/drm/drm

2022-05-25 16:18:27 -07:00

gcov

gcov: Remove compiler version check

2021-12-02 17:25:21 +09:00

irq

Merge tag 'irqchip-5.20' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/core

2022-07-28 12:36:35 +02:00

kcsan

kcsan: test: Add a .kunitconfig to run KCSAN tests

2022-07-22 09:22:59 -06:00

livepatch

Merge tag 'livepatching-for-5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/livepatching/livepatching

2022-06-02 08:55:01 -07:00

locking

Merge tag 'rcu.2022.07.26a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu

2022-08-02 19:12:45 -07:00

module

module: kunit: Load .kunit_test_suites section when CONFIG_KUNIT=m

2022-08-15 13:51:07 -06:00

power

Merge tag 'char-misc-6.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2022-08-04 11:05:48 -07:00

printk

printk: do not wait for consoles when suspended

2022-07-15 10:52:11 +02:00

rcu

Merge tag 'mm-stable-2022-08-03' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2022-08-05 16:32:45 -07:00

sched

wait_on_bit: add an acquire memory barrier

2022-08-26 09:30:25 -07:00

time

time: Correct the prototype of ns_to_kernel_old_timeval and ns_to_timespec64

2022-08-09 20:02:13 +02:00

trace

ftrace: Fix build warning for ops_references_rec() not used

2022-08-22 09:41:12 -04:00

.gitignore

…

acct.c

kernel/acct: move acct sysctls to its own file

2022-04-06 13:43:44 -07:00

async.c

Revert "module, async: async_synchronize_full() on module init iff async is used"

2022-02-03 11:20:34 -08:00

audit_fsnotify.c

audit: fix potential double free on error path from fsnotify_add_inode_mark

2022-08-22 18:50:06 -04:00

audit_tree.c

audit: use fsnotify group lock helpers

2022-04-25 14:37:28 +02:00

audit_watch.c

fsnotify: pass flags argument to fsnotify_alloc_group()

2022-04-25 14:37:12 +02:00

audit.c

audit: make is_audit_feature_set() static

2022-06-13 14:08:57 -04:00

audit.h

audit: log AUDIT_TIME_* records only from rules

2022-02-22 13:51:40 -05:00

auditfilter.c

Merge tag 'audit-pr-20220110' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit

2022-01-11 13:08:21 -08:00

auditsc.c

audit: move audit_return_fixup before the filters

2022-08-25 17:25:08 -04:00

backtracetest.c

…

bounds.c

…

capability.c

xfs: don't generate selinux audit messages for capability testing

2022-03-09 10:32:06 -08:00

cfi.c

context_tracking: Take IRQ eqs entrypoints over RCU

2022-07-05 13:32:59 -07:00

compat.c

arch: remove compat_alloc_user_space

2021-09-08 15:32:35 -07:00

configs.c

…

context_tracking.c

MAINTAINERS: Add Paul as context tracking maintainer

2022-07-05 13:33:00 -07:00

cpu_pm.c

context_tracking: Take IRQ eqs entrypoints over RCU

2022-07-05 13:32:59 -07:00

cpu.c

Merge tag 'x86_tdx_for_v5.19_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2022-05-23 17:51:12 -07:00

crash_core.c

vmcoreinfo: add kallsyms_num_syms symbol

2022-08-28 14:02:44 -07:00

crash_dump.c

…

cred.c

x86: Mark __invalid_creds() __noreturn

2022-03-15 10:32:44 +01:00

delayacct.c

delayacct: track delays from write-protect copy

2022-06-01 15:55:25 -07:00

dma.c

…

exec_domain.c

…

exit.c

kernel: exit: cleanup release_thread()

2022-09-11 21:55:07 -07:00

extable.c

context_tracking: Take NMI eqs entrypoints over RCU

2022-07-05 13:32:59 -07:00

fail_function.c

…

fork.c

Merge tag 'trace-v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace

2022-08-05 09:41:12 -07:00

freezer.c

…

gen_kheaders.sh

kheaders: Have cpio unconditionally replace files

2022-05-08 03:16:59 +09:00

groups.c

security: Add LSM hook to setgroups() syscall

2022-07-15 18:21:49 +00:00

hung_task.c

kernel/hung_task: fix address space of proc_dohung_task_timeout_secs

2022-07-29 18:12:35 -07:00

iomem.c

…

irq_work.c

irq_work: use kasan_record_aux_stack_noalloc() record callstack

2022-04-15 14:49:55 -07:00

jump_label.c

jump_label: make initial NOP patching the special case

2022-06-24 09:48:55 +02:00

kallsyms_internal.h

kallsyms: move declarations to internal header

2022-07-17 17:31:39 -07:00

kallsyms.c

Merge tag 'mm-nonmm-stable-2022-08-06-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2022-08-07 10:03:24 -07:00

kcmp.c

…

Kconfig.freezer

…

Kconfig.hz

…

Kconfig.locks

…

Kconfig.preempt

Revert "signal, x86: Delay calling signals in atomic on RT enabled kernels"

2022-03-31 10:36:55 +02:00

kcov.c

kcov: update pos before writing pc in trace function

2022-05-25 13:05:42 -07:00

kexec_core.c

kexec: replace kmap() with kmap_local_page()

2022-09-11 21:55:08 -07:00

kexec_elf.c

…

kexec_file.c

panic, kexec: make __crash_kexec() NMI safe

2022-09-11 21:55:06 -07:00

kexec_internal.h

panic, kexec: make __crash_kexec() NMI safe

2022-09-11 21:55:06 -07:00

kexec.c

panic, kexec: make __crash_kexec() NMI safe

2022-09-11 21:55:06 -07:00

kheaders.c

…

kmod.c

…

kprobes.c

kprobes: don't call disarm_kprobe() for disabled kprobes

2022-08-20 15:17:46 -07:00

ksysfs.c

kexec: turn all kexec_mutex acquisitions into trylocks

2022-09-11 21:55:06 -07:00

kthread.c

kthread: make it clear that kthread_create_on_node() might be terminated by any fatal signal

2022-06-16 19:11:30 -07:00

latencytop.c

latencytop: move sysctl to its own file

2022-04-21 11:40:59 -07:00

Makefile

kernel: remove platform_has() infrastructure

2022-08-01 07:42:56 +02:00

module_signature.c

…

notifier.c

notifier: Add blocking/atomic_notifier_chain_register_unique_prio()

2022-05-19 19:30:30 +02:00

nsproxy.c

fs/exec: allow to unshare a time namespace on vfork+exec

2022-06-15 07:58:04 -07:00

padata.c

padata: replace cpumask_weight with cpumask_empty in padata.c

2022-01-31 11:21:46 +11:00

panic.c

Merge tag 'linux-kselftest-kunit-5.20-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

2022-08-02 19:34:45 -07:00

params.c

kobject: remove kset from struct kset_uevent_ops callbacks

2021-12-28 11:26:18 +01:00

pid_namespace.c

kernel: pid_namespace: use NULL instead of using plain integer as pointer

2022-04-29 14:38:00 -07:00

pid.c

pid: add pidfd_get_task() helper

2021-10-14 13:29:18 +02:00

profile.c

profile: setup_profiling_timer() is moslty not implemented

2022-07-29 18:12:36 -07:00

ptrace.c

ptrace: fix clearing of JOBCTL_TRACED in ptrace_unfreeze_traced()

2022-07-09 11:06:19 -07:00

range.c

…

reboot.c

Merge branch 'rework/kthreads' into for-linus

2022-06-23 19:11:28 +02:00

regset.c

…

relay.c

relay: remove redundant assignment to pointer buf

2022-05-12 20:38:37 -07:00

resource_kunit.c

…

resource.c

resource: Introduce alloc_free_mem_region()

2022-07-21 17:19:25 -07:00

rseq.c

rseq: Kill process when unknown flags are encountered in ABI structures

2022-08-01 15:21:42 +02:00

scftorture.c

scftorture: Fix distribution of short handler delays

2022-04-11 17:07:29 -07:00

scs.c

kasan, vmalloc: only tag normal vmalloc allocations

2022-03-24 19:06:48 -07:00

seccomp.c

seccomp: Add wait_killable semantic to seccomp user notifier

2022-05-03 14:11:58 -07:00

signal.c

signal handling: don't use BUG_ON() for debugging

2022-07-07 09:53:43 -07:00

smp.c

locking/csd_lock: Change csdlock_debug from early_param to __setup

2022-07-19 11:40:00 -07:00

smpboot.c

smpboot: use atomic_try_cmpxchg in cpu_wait_death and cpu_report_death

2022-09-11 21:55:10 -07:00

smpboot.h

…

softirq.c

context_tracking: Take IRQ eqs entrypoints over RCU

2022-07-05 13:32:59 -07:00

stackleak.c

stackleak: add on/off stack variants

2022-05-08 01:33:09 -07:00

stacktrace.c

uaccess: remove CONFIG_SET_FS

2022-02-25 09:36:06 +01:00

static_call_inline.c

static_call: Don't make __static_call_return0 static

2022-04-05 09:59:38 +02:00

static_call.c

static_call: Don't make __static_call_return0 static

2022-04-05 09:59:38 +02:00

stop_machine.c

Merge tag 'sched-core-2022-05-23' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2022-05-24 11:11:13 -07:00

sys_ni.c

kernel/sys_ni: add compat entry for fadvise64_64

2022-08-20 15:17:45 -07:00

sys.c

arm64/sme: Implement vector length configuration prctl()s

2022-04-22 18:50:54 +01:00

sysctl-test.c

…

sysctl.c

kernel/sysctl.c: Remove trailing white space

2022-08-08 09:01:36 -07:00

task_work.c

task_work: use try_cmpxchg in task_work_add, task_work_cancel_match and task_work_run

2022-09-11 21:55:10 -07:00

taskstats.c

kernel: make taskstats available from all net namespaces

2022-04-29 14:38:03 -07:00

torture.c

torture: Wake up kthreads after storing task_struct pointer

2022-02-01 17:24:39 -08:00

tracepoint.c

…

tsacct.c

taskstats: version 12 with thread group and exe info

2022-04-29 14:38:03 -07:00

ucount.c

ucounts: Handle wrapping in is_ucounts_overlimit

2022-02-17 09:11:57 -06:00

uid16.c

…

uid16.h

…

umh.c

kthread: Don't allocate kthread_struct for init and umh

2022-05-06 14:49:44 -05:00

up.c

…

user_namespace.c

ucounts: Fix systemd LimitNPROC with private users regression

2022-02-25 10:40:14 -06:00

user-return-notifier.c

…

user.c

fs/epoll: use a per-cpu counter for user's watches count

2021-09-08 11:50:27 -07:00

usermode_driver.c

blob_to_mnt(): kern_unmount() is needed to undo kern_mount()

2022-05-19 23:25:47 -04:00

utsname_sysctl.c

…

utsname.c

…

watch_queue.c

Merge tag 'docs-6.0' of git://git.lwn.net/linux

2022-08-02 19:24:24 -07:00

watchdog_hld.c

Revert "printk: add functions to prefer direct printing"

2022-06-23 18:41:40 +02:00

watchdog.c

Merge tag 'powerpc-6.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2022-08-06 16:38:17 -07:00

workqueue_internal.h

…

workqueue.c

Merge tag 'drm-next-2022-08-03' of git://anongit.freedesktop.org/drm/drm

2022-08-03 19:52:08 -07:00