Xie Yongji 9ad6216e8c locking/rwsem: Fix (possible) missed wakeup ... [ Upstream commit e158488be2 ] Because wake_q_add() can imply an immediate wakeup (cmpxchg failure case), we must not rely on the wakeup being delayed. However, commit: e38513905e ("locking/rwsem: Rework zeroing reader waiter->task") relies on exactly that behaviour in that the wakeup must not happen until after we clear waiter->task. [ peterz: Added changelog. ] Signed-off-by: Xie Yongji <xieyongji@baidu.com> Signed-off-by: Zhang Yu <zhangyu31@baidu.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: e38513905e ("locking/rwsem: Rework zeroing reader waiter->task") Link: https://lkml.kernel.org/r/1543495830-2644-1-git-send-email-xieyongji@baidu.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2019-03-05 17:58:49 +01:00
..
bpf	bpf: zero out build_id for BPF_STACK_BUILD_ID_IP	2019-02-27 10:08:56 +01:00
cgroup	cgroup: fix parsing empty mount option string	2019-02-12 19:47:17 +01:00
configs
debug	kdb: Don't back trace on a cpu that didn't round up	2019-02-12 19:47:19 +01:00
dma	dma-direct: do not include SME mask in the DMA supported check	2019-01-13 09:51:05 +01:00
events	perf/x86: Add check_period PMU callback	2019-02-20 10:25:45 +01:00
gcov
irq	genirq: Make sure the initial affinity is not empty	2019-03-05 17:58:47 +01:00
livepatch	Merge branch 'for-4.19/upstream' into for-linus	2018-08-20 18:33:50 +02:00
locking	locking/rwsem: Fix (possible) missed wakeup	2019-03-05 17:58:49 +01:00
power	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2018-10-12 12:35:02 +02:00
printk	printk: Fix panic caused by passing log_buf_len to command line	2018-11-13 11:08:48 -08:00
rcu	srcu: Lock srcu_data structure in srcu_gp_start()	2019-01-13 09:51:06 +01:00
sched	sched/wake_q: Fix wakeup ordering for wake_q	2019-03-05 17:58:49 +01:00
time	timekeeping: Use proper seqcount initializer	2019-02-12 19:47:05 +01:00
trace	tracing: Fix number of entries in trace header	2019-02-27 10:08:49 +01:00
.gitignore
acct.c
async.c
audit_fsnotify.c
audit_tree.c	\n	2018-08-17 09:41:28 -07:00
audit_watch.c
audit.c
audit.h
auditfilter.c
auditsc.c
backtracetest.c
bounds.c	kbuild: fix kernel/bounds.c 'W=1' warning	2018-11-13 11:08:47 -08:00
capability.c
compat.c
configs.c
context_tracking.c
cpu_pm.c
cpu.c	cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM	2019-02-12 19:47:25 +01:00
crash_core.c	kernel/crash_core.c: print timestamp using time64_t	2018-08-22 10:52:47 -07:00
crash_dump.c
cred.c
delayacct.c
dma.c
elfcore.c
exec_domain.c
exit.c	sched/wait: Fix rcuwait_wake_up() ordering	2019-03-05 17:58:49 +01:00
extable.c
fail_function.c
fork.c	fork: record start_time late	2019-01-13 09:51:04 +01:00
freezer.c
futex_compat.c
futex.c	futex: Fix (possible) missed wakeup	2019-03-05 17:58:49 +01:00
groups.c
hung_task.c	kernel/hung_task.c: force console verbose before panic	2019-02-12 19:47:19 +01:00
iomem.c
irq_work.c
jump_label.c	jump_label: Fix typo in warning message	2018-09-10 10:15:48 +02:00
kallsyms.c
kcmp.c
Kconfig.freezer
Kconfig.hz
Kconfig.locks
Kconfig.preempt
kcov.c	kernel/kcov.c: mark write_comp_data() as notrace	2019-02-12 19:47:20 +01:00
kexec_core.c
kexec_file.c
kexec_internal.h
kexec.c
kmod.c
kprobes.c	kprobes: Return error if we fail to reuse kprobe instead of BUG_ON()	2018-11-13 11:08:28 -08:00
ksysfs.c
kthread.c
latencytop.c
Makefile
memremap.c	mm, devm_memremap_pages: add MEMORY_DEVICE_PRIVATE support	2019-01-13 09:51:04 +01:00
module_signing.c
module-internal.h
module.c	kobject: return error code if writing /sys/.../uevent fails	2019-02-12 19:47:06 +01:00
notifier.c
nsproxy.c
padata.c
panic.c	panic: avoid deadlocks in re-entrant console drivers	2018-12-29 13:37:57 +01:00
params.c
pid_namespace.c
pid.c	Fix failure path in alloc_pid()	2019-01-13 09:51:06 +01:00
profile.c
ptrace.c	ptrace: Remove unused ptrace_may_access_sched() and MODE_IBRS	2018-12-05 19:32:03 +01:00
range.c
reboot.c
relay.c
resource.c
rseq.c
seccomp.c
signal.c	signal: Restore the stop PTRACE_EVENT_EXIT	2019-02-20 10:25:48 +01:00
smp.c	cpu/hotplug: Fix "SMT disabled by BIOS" detection for KVM	2019-02-12 19:47:25 +01:00
smpboot.c
smpboot.h
softirq.c
stacktrace.c
stop_machine.c
sys_ni.c
sys.c	kernel/sys.c: remove duplicated include	2018-09-20 22:01:11 +02:00
sysctl_binary.c
sysctl.c	proc/sysctl: fix return error for proc_doulongvec_minmax()	2019-02-12 19:47:19 +01:00
task_work.c
taskstats.c
test_kprobes.c
torture.c
tracepoint.c	tracepoint: Fix tracepoint array element size mismatch	2018-10-17 15:35:29 -04:00
tsacct.c
ucount.c
uid16.c
uid16.h
umh.c
up.c
user_namespace.c	userns: also map extents in the reverse map to kernel IDs	2018-11-13 11:09:00 -08:00
user-return-notifier.c
user.c	userns: use irqsave variant of refcount_dec_and_lock()	2018-08-22 10:52:47 -07:00
utsname_sysctl.c
utsname.c
watchdog_hld.c	watchdog: Mark watchdog touch functions as notrace	2018-08-30 12:56:40 +02:00
watchdog.c	watchdog: Mark watchdog touch functions as notrace	2018-08-30 12:56:40 +02:00
workqueue_internal.h
workqueue.c	watchdog: Mark watchdog touch functions as notrace	2018-08-30 12:56:40 +02:00