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Yanfei Xu 5197fcd09a locking/rwsem: Fix comments about reader optimistic lock stealing conditions 
After the commit 617f3ef95177 ("locking/rwsem: Remove reader
optimistic spinning"), reader doesn't support optimistic spinning
anymore, there is no need meet the condition which OSQ is empty.

BTW, add an unlikely() for the max reader wakeup check in the loop.

Signed-off-by: Yanfei Xu <yanfei.xu@windriver.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Waiman Long <longman@redhat.com>
Link: https://lore.kernel.org/r/20211013134154.1085649-4-yanfei.xu@windriver.com
2021-10-19 17:27:06 +02:00
..
bpf
Merge https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
2021-08-30 16:42:47 -07:00
cgroup
Merge branch 'akpm' (patches from Andrew)
2021-09-03 10:08:28 -07:00
configs
drivers/char: remove /dev/kmem for good
2021-05-07 00:26:34 -07:00
debug
kgdb patches for 5.15
2021-09-07 12:08:04 -07:00
dma
Merge branch 'stable/for-linus-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb
2021-09-03 10:34:44 -07:00
entry
tick/nohz: Only check for RCU deferred wakeup on user/guest entry when needed
2021-05-31 10:14:49 +02:00
events
Merge tag 'denywrite-for-5.15' of git://github.com/davidhildenbrand/linux
2021-09-04 11:35:47 -07:00
futex
futex: Fix PREEMPT_RT build
2021-10-19 17:27:05 +02:00
gcov
Kconfig: Introduce ARCH_WANTS_NO_INSTR and CC_HAS_NO_PROFILE_FN_ATTR
2021-06-22 11:07:18 -07:00
irq
powerpc updates for 5.15
2021-09-03 11:22:50 -07:00
kcsan
LKMM updates:
2021-09-02 13:00:15 -07:00
livepatch
livepatch: Replace deprecated CPU-hotplug functions.
2021-08-19 12:00:24 +02:00
locking
locking/rwsem: Fix comments about reader optimistic lock stealing conditions
2021-10-19 17:27:06 +02:00
power
Merge branches 'pm-pci', 'pm-sleep', 'pm-domains' and 'powercap'
2021-08-30 19:25:42 +02:00
printk
Merge branch 'rework/printk_safe-removal' into for-linus
2021-08-30 16:36:10 +02:00
rcu
lockdep: Improve comments in wait-type checks
2021-09-17 15:08:45 +02:00
sched
sched: Make RCU nest depth distinct in __might_resched()
2021-10-01 13:57:51 +02:00
time
Merge branch 'akpm' (patches from Andrew)
2021-09-03 10:08:28 -07:00
trace
Minor fixes to the processing of the bootconfig tree.
2021-09-11 10:16:30 -07:00
.gitignore
.gitignore: prefix local generated files with a slash
2021-05-02 00:43:35 +09:00
acct.c
kernel/acct.c: use dedicated helper to access rlimit values
2021-09-08 11:50:26 -07:00
async.c
kernel/async.c: remove async_unregister_domain()
2021-05-07 00:26:33 -07:00
audit_fsnotify.c
audit_alloc_mark(): don't open-code ERR_CAST()
2021-02-23 10:25:27 -05:00
audit_tree.c
audit: move put_tree() to avoid trim_trees refcount underflow and UAF
2021-08-24 18:52:36 -04:00
audit_watch.c
fsnotify: generalize handle_inode_event()
2020-12-03 14:58:35 +01:00
audit.c
lsm: separate security_task_getsecid() into subjective and objective variants
2021-03-22 15:23:32 -04:00
audit.h
audit: add header protection to kernel/audit.h
2021-07-19 22:38:24 -04:00
auditfilter.c
lsm: separate security_task_getsecid() into subjective and objective variants
2021-03-22 15:23:32 -04:00
auditsc.c
audit: remove trailing spaces and tabs
2021-06-10 20:59:05 -04:00
backtracetest.c
…
bounds.c
…
capability.c
capability: handle idmapped mounts
2021-01-24 14:27:16 +01:00
cfi.c
cfi: Use rcu_read_{un}lock_sched_notrace
2021-08-11 13:11:12 -07:00
compat.c
arch: remove compat_alloc_user_space
2021-09-08 15:32:35 -07:00
configs.c
…
context_tracking.c
…
cpu_pm.c
PM: cpu: Make notifier chain use a raw_spinlock_t
2021-08-16 18:55:32 +02:00
cpu.c
cpu/hotplug: Add debug printks for hotplug callback failures
2021-08-10 18:31:32 +02:00
crash_core.c
kdump: use vmlinux_build_id to simplify
2021-07-08 11:48:22 -07:00
crash_dump.c
…
cred.c
ucounts: Increase ucounts reference counter before the security hook
2021-08-23 16:13:04 -05:00
delayacct.c
delayacct: Add sysctl to enable at runtime
2021-05-12 11:43:25 +02:00
dma.c
…
exec_domain.c
…
exit.c
io_uring: remove files pointer in cancellation functions
2021-08-23 13:10:37 -06:00
extable.c
…
fail_function.c
fault-injection: handle EI_ETYPE_TRUE
2020-12-15 22:46:19 -08:00
fork.c
mm/hugetlb: initialize hugetlb_usage in mm_init
2021-09-08 18:45:53 -07:00
freezer.c
sched: Add get_current_state()
2021-06-18 11:43:08 +02:00
gen_kheaders.sh
kbuild: clean up ${quiet} checks in shell scripts
2021-05-27 04:01:50 +09:00
groups.c
groups: simplify struct group_info allocation
2021-02-26 09:41:03 -08:00
hung_task.c
Merge branch 'akpm' (patches from Andrew)
2021-07-02 12:08:10 -07:00
iomem.c
…
irq_work.c
irq_work: Make irq_work_queue() NMI-safe again
2021-06-10 10:00:08 +02:00
jump_label.c
jump_label: Fix jump_label_text_reserved() vs __init
2021-07-05 10:46:20 +02:00
kallsyms.c
module: add printk formats to add module build ID to stacktraces
2021-07-08 11:48:22 -07:00
kcmp.c
Merge branch 'exec-update-lock-for-v5.11' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2020-12-15 19:36:48 -08:00
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
locking/rwlock: Provide RT variant
2021-08-17 17:50:51 +02:00
Kconfig.preempt
sched/core: Disable CONFIG_SCHED_CORE by default
2021-06-28 22:43:05 +02:00
kcov.c
kernel: make kcov_common_handle consider the current context
2020-11-02 18:00:20 -08:00
kexec_core.c
Merge branch 'rework/printk_safe-removal' into for-linus
2021-08-30 16:36:10 +02:00
kexec_elf.c
…
kexec_file.c
kernel: kexec_file: fix error return code of kexec_calculate_store_digests()
2021-05-07 00:26:32 -07:00
kexec_internal.h
kexec: move machine_kexec_post_load() to public interface
2021-02-22 12:33:26 +00:00
kexec.c
kexec: avoid compat_alloc_user_space
2021-09-08 15:32:34 -07:00
kheaders.c
…
kmod.c
modules: add CONFIG_MODPROBE_PATH
2021-05-07 00:26:33 -07:00
kprobes.c
Locking fixes:
2021-07-11 11:06:09 -07:00
ksysfs.c
…
kthread.c
Merge branch 'akpm' (patches from Andrew)
2021-06-29 17:29:11 -07:00
latencytop.c
…
Makefile
futex: Move to kernel/futex/
2021-10-07 13:51:07 +02:00
module_signature.c
module: harden ELF info handling
2021-01-19 10:24:45 +01:00
module_signing.c
module: harden ELF info handling
2021-01-19 10:24:45 +01:00
module-internal.h
…
module.c
printk: Userspace format indexing support
2021-07-19 11:57:48 +02:00
notifier.c
notifier: Remove atomic_notifier_call_chain_robust()
2021-08-16 18:55:32 +02:00
nsproxy.c
memcg: enable accounting for new namesapces and struct nsproxy
2021-09-03 09:58:12 -07:00
padata.c
padata: Remove repeated verbose license text
2021-08-27 16:30:18 +08:00
panic.c
Merge branch 'rework/printk_safe-removal' into for-linus
2021-08-30 16:36:10 +02:00
params.c
params: lift param_set_uint_minmax to common code
2021-08-16 14:42:22 +02:00
pid_namespace.c
memcg: enable accounting for new namesapces and struct nsproxy
2021-09-03 09:58:12 -07:00
pid.c
kernel/pid.c: implement additional checks upon pidfd_create() parameters
2021-08-10 12:53:07 +02:00
profile.c
profiling: fix shift-out-of-bounds bugs
2021-09-08 11:50:26 -07:00
ptrace.c
sched: Change task_struct::state
2021-06-18 11:43:09 +02:00
range.c
kernel.h: split out min()/max() et al. helpers
2020-10-16 11:11:19 -07:00
reboot.c
reboot: Add hardware protection power-off
2021-06-21 13:08:36 +01:00
regset.c
…
relay.c
relay: allow the use of const callback structs
2020-12-15 22:46:18 -08:00
resource_kunit.c
resource: provide meaningful MODULE_LICENSE() in test suite
2020-11-25 18:52:35 +01:00
resource.c
kernel/resource: fix return code check in __request_free_mem_region
2021-05-14 19:41:32 -07:00
rseq.c
rseq: Optimise rseq_get_rseq_cs() and clear_rseq_cs()
2021-04-14 18:04:09 +02:00
scftorture.c
scftorture: Avoid NULL pointer exception on early exit
2021-07-27 11:39:30 -07:00
scs.c
scs: switch to vmapped shadow stacks
2020-12-01 10:30:28 +00:00
seccomp.c
Merge branch 'exit-cleanups-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-09-01 14:52:05 -07:00
signal.c
Merge branch 'akpm' (patches from Andrew)
2021-09-03 10:08:28 -07:00
smp.c
smp: Fix all kernel-doc warnings
2021-08-11 14:47:16 +02:00
smpboot.c
smpboot: Replace deprecated CPU-hotplug functions.
2021-08-10 14:57:42 +02:00
smpboot.h
…
softirq.c
genirq: Change force_irqthreads to a static key
2021-08-10 22:50:07 +02:00
stackleak.c
…
stacktrace.c
…
static_call.c
static_call: Fix static_call_text_reserved() vs __init
2021-07-05 10:46:33 +02:00
stop_machine.c
stop_machine: Add caller debug info to queue_stop_cpus_work
2021-03-23 16:01:58 +01:00
sys_ni.c
futex: Implement sys_futex_waitv()
2021-10-07 13:51:11 +02:00
sys.c
Merge branch 'akpm' (patches from Andrew)
2021-09-08 12:55:35 -07:00
sysctl-test.c
kernel/sysctl-test: Remove some casts which are no-longer required
2021-06-23 16:41:24 -06:00
sysctl.c
Merge branch 'akpm' (patches from Andrew)
2021-09-03 10:08:28 -07:00
task_work.c
kasan: record task_work_add() call stack
2021-04-30 11:20:42 -07:00
taskstats.c
treewide: rename nla_strlcpy to nla_strscpy.
2020-11-16 08:08:54 -08:00
test_kprobes.c
…
torture.c
torture: Replace deprecated CPU-hotplug functions.
2021-08-10 10:48:07 -07:00
tracepoint.c
tracepoint: Fix kerneldoc comments
2021-08-16 11:39:51 -04:00
tsacct.c
…
ucount.c
ucounts: add missing data type changes
2021-08-09 15:45:02 -05:00
uid16.c
…
uid16.h
…
umh.c
kernel/umh.c: fix some spelling mistakes
2021-05-07 00:26:34 -07:00
up.c
A set of locking related fixes and updates:
2021-05-09 13:07:03 -07:00
user_namespace.c
memcg: enable accounting for new namesapces and struct nsproxy
2021-09-03 09:58:12 -07:00
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
Merge branch 'work.namei' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2021-07-03 11:41:14 -07:00
utsname_sysctl.c
…
utsname.c
…
watch_queue.c
watch_queue: rectify kernel-doc for init_watch()
2021-01-26 11:16:34 +00:00
watchdog_hld.c
…
watchdog.c
kernel: watchdog: modify the explanation related to watchdog thread
2021-06-29 10:53:46 -07:00
workqueue_internal.h
workqueue: Assign a color to barrier work items
2021-08-17 07:49:10 -10:00
workqueue.c
workqueue: Assign a color to barrier work items
2021-08-17 07:49:10 -10:00