Lukas Wunner 225ce6d7f2 workqueue: Allow retrieval of current task's work struct ...

commit 27d4ee0307 upstream.

Introduce a helper to retrieve the current task's work struct if it is
a workqueue worker.

This allows us to fix a long-standing deadlock in several DRM drivers
wherein the ->runtime_suspend callback waits for a specific worker to
finish and that worker in turn calls a function which waits for runtime
suspend to finish.  That function is invoked from multiple call sites
and waiting for runtime suspend to finish is the correct thing to do
except if it's executing in the context of the worker.

Cc: Lai Jiangshan <jiangshanlai@gmail.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Link: https://patchwork.freedesktop.org/patch/msgid/2d8f603074131eb87e588d2b803a71765bd3a2fd.1518338788.git.lukas@wunner.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-03-18 11:18:48 +01:00

..

bpf

bpf: add schedule points in percpu arrays management

2018-03-11 16:21:35 +01:00

configs

config: android: enable CONFIG_SECCOMP

2016-10-11 15:06:32 -07:00

debug

kdb: Fix handling of kallsyms_symbol_next() return value

2017-12-14 09:28:13 +01:00

events

perf/x86/intel: Account interrupts for PEBS errors

2017-12-09 22:01:52 +01:00

gcov

gcov: support GCC 7.1

2017-09-02 07:07:53 +02:00

irq

genirq: Guard handle_bad_irq log messages

2018-03-03 10:23:25 +01:00

livepatch

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locking

locking/lockdep: Add nest_lock integrity test

2017-10-21 17:21:33 +02:00

power

sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs

2017-10-12 11:51:25 +02:00

printk

printk: use rcuidle console tracepoint

2017-02-23 17:44:36 +01:00

rcu

rcu: Allow for page faults in NMI handlers

2017-10-18 09:35:38 +02:00

sched

sched/rt: Up the root domain ref count when passing it around via IPIs

2018-02-17 13:21:13 +01:00

time

timers: Forward timer base before migrating timers

2018-03-11 16:21:28 +01:00

trace

blktrace: fix unlocked registration of tracepoints

2018-02-25 11:05:41 +01:00

.gitignore

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acct.c

kernel/acct.c: fix the acct->needcheck check in check_free_space()

2018-01-10 09:29:51 +01:00

async.c

kernel/async.c: revert "async: simplify lowest_in_progress()"

2018-02-17 13:21:18 +01:00

audit_fsnotify.c

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audit_tree.c

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audit_watch.c

audit: Fix use after free in audit_remove_watch_rule()

2017-08-24 17:12:18 -07:00

audit.c

audit: ensure that 'audit=1' actually enables audit for PID 1

2017-12-16 16:25:47 +01:00

audit.h

…

auditfilter.c

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auditsc.c

Merge branch 'stable-4.9' of git://git.infradead.org/users/pcmoore/audit

2016-10-04 14:21:41 -07:00

backtracetest.c

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bounds.c

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capability.c

ptrace: Capture the ptracer's creds not PT_PTRACE_CAP

2017-01-06 10:40:13 +01:00

cgroup_freezer.c

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cgroup_pids.c

cgroup/pids: remove spurious suspicious RCU usage warning

2017-03-26 13:05:58 +02:00

cgroup.c

cgroup: fix error return value from cgroup_subtree_control()

2017-08-11 08:49:28 -07:00

compat.c

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configs.c

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context_tracking.c

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cpu_pm.c

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cpu.c

timers: Reinitialize per cpu bases on hotplug

2018-01-02 20:35:17 +01:00

cpuset.c

sched/cpuset/pm: Fix cpuset vs. suspend-resume bugs

2017-10-12 11:51:25 +02:00

crash_dump.c

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cred.c

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delayacct.c

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dma.c

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elfcore.c

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exec_domain.c

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exit.c

sched/autogroup: Do not use autogroup->tg in zombie threads

2016-11-22 12:33:43 +01:00

extable.c

kernel/extable.c: mark core_kernel_text notrace

2017-07-21 07:42:21 +02:00

fork.c

kaiser: stack map PAGE_SIZE at THREAD_SIZE-PAGE_SIZE

2018-01-05 15:46:32 +01:00

freezer.c

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futex_compat.c

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futex.c

futex: Prevent overflow by strengthen input validation

2018-01-23 19:57:04 +01:00

groups.c

kernel: make groups_sort calling a responsibility group_info allocators

2018-01-10 09:29:52 +01:00

hung_task.c

hung_task: allow hung_task_panic when hung_task_warnings is 0

2016-10-11 15:06:33 -07:00

irq_work.c

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jump_label.c

jump_label: Invoke jump_label_test() via early_initcall()

2017-12-14 09:28:24 +01:00

kallsyms.c

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kcmp.c

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Kconfig.freezer

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Kconfig.hz

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Kconfig.locks

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Kconfig.preempt

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kcov.c

kcov: detect double association with a single task

2018-02-25 11:05:42 +01:00

kexec_core.c

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kexec_file.c

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kexec_internal.h

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kexec.c

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kmod.c

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kprobes.c

tracing/kprobes: Enforce kprobes teardown after testing

2017-05-25 15:44:47 +02:00

ksysfs.c

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kthread.c

cgroup, kthread: close race window where new kthreads can be migrated to non-root cgroups

2017-04-21 09:31:18 +02:00

latencytop.c

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Makefile

kernel/watchdog.c: move hardlockup detector to separate file

2017-06-17 06:41:57 +02:00

membarrier.c

Fix: Disable sys_membarrier when nohz_full is enabled

2017-03-12 06:41:45 +01:00

memremap.c

mm: Fix devm_memremap_pages() collision handling

2018-02-28 10:18:34 +01:00

module_signing.c

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module-internal.h

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module.c

module/retpoline: Warn about missing retpoline in module

2018-02-13 12:35:58 +01:00

notifier.c

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nsproxy.c

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padata.c

padata: free correct variable

2017-05-20 14:28:40 +02:00

panic.c

kernel/panic.c: add missing \n

2017-07-05 14:40:24 +02:00

params.c

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pid_namespace.c

pid_ns: Sleep in TASK_INTERRUPTIBLE in zap_pid_ns_processes

2017-05-25 15:44:38 +02:00

pid.c

pids: make task_tgid_nr_ns() safe

2017-08-24 17:12:21 -07:00

profile.c

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ptrace.c

ptrace: Properly initialize ptracer_cred on fork

2017-06-14 15:05:54 +02:00

range.c

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reboot.c

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relay.c

kernel/relay.c: revert "kernel/relay.c: fix potential memory leak"

2018-02-17 13:21:18 +01:00

resource.c

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seccomp.c

seccomp: fix the usage of get/put_seccomp_filter() in seccomp_get_filter()

2017-10-05 09:44:02 +02:00

signal.c

kernel/signal.c: remove the no longer needed SIGNAL_UNKILLABLE check in complete_signal()

2018-01-10 09:29:53 +01:00

smp.c

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smpboot.c

kthread/smpboot: do not park in kthread_create_on_cpu()

2016-10-11 15:06:33 -07:00

smpboot.h

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softirq.c

softirq: Display IRQ_POLL for irq-poll statistics

2016-10-21 15:45:47 -06:00

stacktrace.c

stacktrace, lockdep: Fix address, newline ugliness

2017-02-14 15:25:42 -08:00

stop_machine.c

Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-10-03 13:39:00 -07:00

sys_ni.c

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sys.c

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sysctl_binary.c

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sysctl.c

timer/sysclt: Restrict timer migration sysctl values to 0 and 1

2017-10-05 09:44:04 +02:00

task_work.c

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taskstats.c

taskstats: fix the length of cgroupstats_cmd_get_policy

2016-11-03 16:55:58 -04:00

test_kprobes.c

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torture.c

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tracepoint.c

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tsacct.c

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ucount.c

kernel/ucount.c: mark user_header with kmemleak_ignore()

2017-06-17 06:41:51 +02:00

uid16.c

kernel: make groups_sort calling a responsibility group_info allocators

2018-01-10 09:29:52 +01:00

up.c

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user_namespace.c

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user-return-notifier.c

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user.c

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utsname_sysctl.c

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utsname.c

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watchdog_hld.c

kernel/watchdog: prevent false hardlockup on overloaded system

2017-06-17 06:41:57 +02:00

watchdog.c

kernel/watchdog: prevent false hardlockup on overloaded system

2017-06-17 06:41:57 +02:00

workqueue_internal.h

workqueue: Fix NULL pointer dereference

2017-11-15 15:53:17 +01:00

workqueue.c

workqueue: Allow retrieval of current task's work struct

2018-03-18 11:18:48 +01:00