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Uros Bizjak 9734fe4dc2 panic: use atomic_try_cmpxchg in panic() and nmi_panic() 
Use atomic_try_cmpxchg instead of atomic_cmpxchg (*ptr, old, new) == old
in panic() and nmi_panic().  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, rename cpu variable to this_cpu in nmi_panic() and try to unify
logic flow between panic() and nmi_panic().

No functional change intended.

[ubizjak@gmail.com: clean up if/else block]
  Link: https://lkml.kernel.org/r/20230906191200.68707-1-ubizjak@gmail.com
Link: https://lkml.kernel.org/r/20230904152230.9227-1-ubizjak@gmail.com
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2023-10-04 10:41:56 -07:00
..
bpf
Merge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
2023-09-16 11:16:00 +01:00
cgroup
cgroup: fix build when CGROUP_SCHED is not enabled
2023-09-02 08:27:17 -07:00
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
Merge tag 'printk-for-6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux
2023-09-04 13:20:19 -07:00
dma
swiotlb: fix the check whether a device has used software IO TLB
2023-09-27 11:19:15 +02:00
entry
entry: Remove empty addr_limit_user_check()
2023-08-23 10:32:39 +02:00
events
Merge tag 'powerpc-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2023-08-31 12:43:10 -07:00
futex
mm/mm_init.c: remove obsolete macro HASH_SMALL
2023-08-18 10:12:07 -07:00
gcov
gcov: shut up missing prototype warnings for internal stubs
2023-08-18 10:18:58 -07:00
irq
Merge tag 'irq-core-2023-08-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2023-08-28 14:33:11 -07:00
kcsan
kcsan: Don't expect 64 bits atomic builtins from 32 bits architectures
2023-06-09 23:29:50 +10:00
livepatch
livepatch: Make 'klp_stack_entries' static
2023-06-05 13:56:52 +02:00
locking
Merge tag 'mm-nonmm-stable-2023-08-28-22-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-08-29 14:53:51 -07:00
module
module/decompress: use vmalloc() for zstd decompression workspace
2023-08-29 09:39:08 -07:00
power
PM: hibernate: Fix the exclusive get block device in test_resume mode
2023-09-12 11:45:15 +02:00
printk
Revert "printk: export symbols for debug modules"
2023-09-07 14:19:42 +02:00
rcu
Merge tag 'tty-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
2023-09-01 09:38:00 -07:00
sched
sched/rt: Fix live lock between select_fallback_rq() and RT push
2023-09-28 22:58:13 +02:00
time
Merge tag 'timers-urgent-2023-09-02' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2023-09-02 09:01:48 -07:00
trace
tracing/user_events: Align set_bit() address for all archs
2023-09-30 16:25:41 -04:00
.gitignore
…
acct.c
Merge tag 'audit-pr-20230829' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit
2023-08-30 08:17:35 -07:00
async.c
…
audit_fsnotify.c
…
audit_tree.c
…
audit_watch.c
…
audit.c
audit: move trailing statements to next line
2023-08-15 18:16:14 -04:00
audit.h
audit: correct audit_filter_inodes() definition
2023-07-21 12:17:25 -04:00
auditfilter.c
audit: move trailing statements to next line
2023-08-15 18:16:14 -04:00
auditsc.c
Merge tag 'net-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2023-09-07 18:33:07 -07:00
backtracetest.c
…
bounds.c
…
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
cpu/hotplug: Prevent self deadlock on CPU hot-unplug
2023-08-30 12:24:22 +02:00
crash_core.c
Crash: add lock to serialize crash hotplug handling
2023-09-29 17:20:48 -07:00
crash_dump.c
…
cred.c
cred: convert printks to pr_<level>
2023-08-18 10:18:49 -07:00
delayacct.c
…
dma.c
…
exec_domain.c
…
exit.c
kill task_struct->thread_group
2023-10-04 10:41:56 -07:00
extable.c
…
fail_function.c
…
fork.c
kill task_struct->thread_group
2023-10-04 10:41:56 -07:00
freezer.c
…
gen_kheaders.sh
Revert "kheaders: substituting --sort in archive creation"
2023-05-28 16:20:21 +09:00
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
…
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
docs: fix link s390/zfcpdump.rst
2023-10-04 10:41:56 -07:00
Kconfig.locks
…
Kconfig.preempt
…
kcov.c
kcov: add prototypes for helper functions
2023-06-09 17:44:17 -07:00
kexec_core.c
crash: add generic infrastructure for crash hotplug support
2023-08-24 16:25:13 -07:00
kexec_elf.c
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kexec_file.c
Merge tag 'integrity-v6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
2023-08-30 09:16:56 -07:00
kexec_internal.h
…
kexec.c
crash: hotplug support for kexec_load()
2023-08-24 16:25:14 -07:00
kheaders.c
…
kprobes.c
kernel: kprobes: Use struct_size()
2023-08-23 09:38:17 +09:00
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: unexport __kthread_should_park()
2023-08-18 10:18:59 -07:00
latencytop.c
…
Makefile
Merge tag 'v6.5-rc1-modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux
2023-06-28 15:51:08 -07:00
module_signature.c
…
notifier.c
…
nsproxy.c
nsproxy: Convert nsproxy.count to refcount_t
2023-08-21 11:29:12 -07:00
padata.c
…
panic.c
panic: use atomic_try_cmpxchg in panic() and nmi_panic()
2023-10-04 10:41:56 -07:00
params.c
kernel: params: Remove unnecessary ‘0’ values from err
2023-07-10 12:47:01 -07:00
pid_namespace.c
memfd: replace ratcheting feature from vm.memfd_noexec with hierarchy
2023-08-21 13:37:59 -07:00
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
…
ptrace.c
…
range.c
…
reboot.c
…
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
…
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
__kill_pgrp_info: simplify the calculation of return value
2023-10-04 10:41:56 -07:00
smp.c
smp: Reduce NMI traffic from CSD waiters to CSD destination
2023-07-10 14:19:04 -07:00
smpboot.c
cpu/hotplug: Remove unused state functions
2023-05-15 13:45:00 +02:00
smpboot.h
…
softirq.c
sched/core: introduce sched_core_idle_cpu()
2023-07-13 15:21:50 +02:00
stackleak.c
…
stacktrace.c
…
static_call_inline.c
…
static_call.c
…
stop_machine.c
…
sys_ni.c
x86/shstk: Introduce map_shadow_stack syscall
2023-08-02 15:01:51 -07:00
sys.c
prctl: move PR_GET_AUXV out of PR_MCE_KILL
2023-07-17 12:53:21 -07:00
sysctl-test.c
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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: add kerneldoc annotation for 'data' argument
2023-09-19 13:21:32 -07:00
taskstats.c
…
torture.c
torture: Stop right-shifting torture_random() return values
2023-08-14 15:01:08 -07:00
tracepoint.c
…
tsacct.c
…
ucount.c
sysctl: Add size to register_sysctl
2023-08-15 15:26:17 -07:00
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: Fix worker hangs due to missed wake up calls
2023-06-08 15:43:09 -04:00
watch_queue.c
watch_queue: prevent dangling pipe pointer
2023-06-06 10:47:04 +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: add a weak function for an arch to detect if perf can use NMIs
2023-06-09 17:44:21 -07:00
watchdog.c
watchdog/hardlockup: avoid large stack frames in watchdog_hardlockup_check()
2023-08-18 10:19:00 -07:00
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: Fix missed pwq_release_worker creation in wq_cpu_intensive_thresh_init()
2023-09-18 08:50:31 -10:00