Evolution-X-Devices/kernel_google_b4s4
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56ea74ecece682052425b86bae3cebf025f36855
kernel_google_b4s4/kernel
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Pavankumar Kondeti 56ea74ecec sched: Disable interrupts while holding related_thread_group_lock 
There is a potential deadlock condition if interrupts are enabled
while holding the related_thread_group_lock. Prevent this.

----------------                              --------------------
    CPU 0                                          CPU 1
---------------                               --------------------

check_for_migration()                         cgroup_file_write(p)

check_for_freq_change()                       cgroup_attach_task(p)

send_notification()                           schedtune_attach(p)

read_lock(&related_thread_group_lock)         sched_set_group_id(p)

                                              raw_spin_lock_irqsave(
					       &p->pi_lock, flags)

					      write_lock_irqsave(
					       &related_thread_group_lock)

					       waiting on CPU#0

raw_spin_lock_irqsave(&rq->lock, flags)

raw_spin_unlock_irqrestore(&rq->lock, flags)

--> interrupt()

----> ttwu(p)

-------> waiting for p's pi_lock on CPU#1

Change-Id: I6f0f8f742d6e1b3ff735dcbeabd54ef101329cdf
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
2017-02-07 14:51:23 -08:00
..
bpf
bpf: fix states equal logic for varlen access
2016-11-30 14:50:52 -05:00
configs
ANDROID: android-base: CONFIG_HARDENED_USERCOPY=y
2016-10-24 23:42:20 +08:00
debug
kdb: support new lines without carriage returns
2016-10-24 23:41:21 +08:00
events
perf: Add cpu isolation awareness
2017-02-07 14:50:31 -08:00
gcov
gcov: add support for gcc version >= 6
2016-07-15 14:54:27 +09:00
irq
irq: Make irq affinity function cpu isolation aware
2017-02-07 14:50:27 -08:00
livepatch
livepatch/module: make TAINT_LIVEPATCH module-specific
2016-08-26 14:42:08 +02:00
locking
Merge remote-tracking branch 'origin/tmp-69973b8' into msm-4.8
2016-12-12 10:21:46 -08:00
power
pmqos: Enable cpu isolation awareness
2017-02-07 14:50:29 -08:00
printk
Merge remote-tracking branch 'origin/tmp-9c76358' into msm-4.8
2016-11-20 15:03:58 -08:00
rcu
Merge tag 'gcc-plugins-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
2016-10-15 10:03:15 -07:00
sched
sched: Disable interrupts while holding related_thread_group_lock
2017-02-07 14:51:23 -08:00
time
timer: Do not require CPUSETS to be enabled for migration
2017-02-07 14:50:20 -08:00
trace
Merge remote-tracking branch 'origin/tmp-9c76358' into msm-4.8
2016-11-20 15:03:58 -08:00
.gitignore
…
acct.c
…
async.c
…
audit_fsnotify.c
…
audit_tree.c
audit: cleanup prune_tree_thread
2016-04-04 09:46:47 -04:00
audit_watch.c
Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/audit
2016-09-01 15:55:56 -07:00
audit.c
Merge branch 'stable-4.9' of git://git.infradead.org/users/pcmoore/audit
2016-10-04 14:21:41 -07:00
audit.h
Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/audit
2016-07-29 17:54:17 -07:00
auditfilter.c
audit: add fields to exclude filter by reusing user filter
2016-06-27 11:01:00 -04:00
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
…
bounds.c
…
capability.c
kernel: Add noaudit variant of ns_capable()
2016-06-06 20:16:18 +10:00
cgroup_freezer.c
…
cgroup_pids.c
cgroup: Use lld instead of ld when printing pids controller events_limit
2016-06-21 15:03:36 -04:00
cgroup.c
cgroup: refactor allow_attach handler for 4.4
2016-10-24 23:41:21 +08:00
compat.c
…
configs.c
…
context_tracking.c
…
cpu_pm.c
…
cpu.c
cpumask: Add cpu isolation support
2017-02-07 14:50:21 -08:00
cpuset.c
cpuset: Make cpusets restore on hotplug
2016-10-24 23:41:21 +08:00
crash_dump.c
…
cred.c
cred: Reject inodes with invalid ids in set_create_file_as()
2016-06-30 18:05:09 -05:00
delayacct.c
…
dma.c
…
elfcore.c
…
exec_domain.c
…
exit.c
sched/autogroup: Do not use autogroup->tg in zombie threads
2016-11-22 12:33:43 +01:00
extable.c
…
fork.c
sched/hmp: Fix memory leak when task fork fails
2017-02-07 14:51:11 -08:00
freezer.c
freezer, oom: check TIF_MEMDIE on the correct task
2016-07-28 16:07:41 -07:00
futex_compat.c
…
futex.c
futex: Add some more function commentry
2016-09-05 17:20:18 +02:00
groups.c
cred: simpler, 1D supplementary groups
2016-10-07 18:46:30 -07:00
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
…
jump_label.c
Merge tag 'powerpc-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
2016-08-05 09:00:54 -04:00
kallsyms.c
kallsyms: add support for relative offsets in kallsyms address table
2016-03-15 16:55:16 -07:00
kcmp.c
…
Kconfig.freezer
…
Kconfig.hz
…
Kconfig.locks
…
Kconfig.preempt
…
kcov.c
kcov: add missing #include <linux/sched.h>
2016-12-07 17:10:00 -08:00
kexec_core.c
kexec: add restriction on kexec_load() segment sizes
2016-08-02 19:35:31 -04:00
kexec_file.c
kexec: fix double-free when failing to relocate the purgatory
2016-09-01 17:52:01 -07:00
kexec_internal.h
…
kexec.c
kexec: allow architectures to override boot mapping
2016-08-02 19:35:27 -04:00
kmod.c
…
kprobes.c
kprobes: include <asm/sections.h> instead of <asm-generic/sections.h>
2016-10-11 15:06:31 -07:00
ksysfs.c
kexec: add a kexec_crash_loaded() function
2016-08-02 19:35:30 -04:00
kthread.c
kthread: better support freezable kthread workers
2016-10-11 15:06:33 -07:00
latencytop.c
…
Makefile
userns: Add per user namespace sysctls.
2016-08-08 13:18:58 -05:00
membarrier.c
…
memremap.c
mm: fix cache mode of dax pmd mappings
2016-09-09 17:34:46 -07:00
module_signing.c
KEYS: Move the point of trust determination to __key_link()
2016-04-11 22:43:43 +01:00
module-internal.h
…
module.c
Re-enable CONFIG_MODVERSIONS in a slightly weaker form
2016-11-29 16:01:30 -08:00
notifier.c
…
nsproxy.c
…
padata.c
padata: Convert to hotplug state machine
2016-09-19 21:44:30 +02:00
panic.c
x86/panic: replace smp_send_stop() with kdump friendly version in panic path
2016-10-11 15:06:32 -07:00
params.c
…
pid_namespace.c
Merge branch 'nsfs-ioctls' into HEAD
2016-09-22 20:00:36 -05:00
pid.c
remove lots of IS_ERR_VALUE abuses
2016-05-27 15:26:11 -07:00
profile.c
profile: Convert to hotplug state machine
2016-07-15 10:41:42 +02:00
ptrace.c
mm: replace access_process_vm() write parameter with gup_flags
2016-10-19 08:31:25 -07:00
range.c
…
reboot.c
…
relay.c
relay: Use irq_work instead of plain timer for deferred wakeup
2016-10-11 15:06:32 -07:00
resource.c
/proc/iomem: only expose physical resource addresses to privileged users
2016-04-14 12:56:09 -07:00
seccomp.c
seccomp: Fix tracer exit notifications during fatal signals
2016-08-30 16:12:46 -07:00
signal.c
x86/signal: Add SA_{X32,IA32}_ABI sa_flags
2016-09-14 21:28:11 +02:00
smp.c
smp: Do not wake up all idle CPUs
2017-02-07 14:50:30 -08:00
smpboot.c
sched: Add per CPU load tracking for each task
2017-02-07 14:50:51 -08:00
smpboot.h
cpu/hotplug: Create hotplug threads
2016-03-01 20:36:56 +01:00
softirq.c
softirq: Display IRQ_POLL for irq-poll statistics
2016-10-21 15:45:47 -06:00
stacktrace.c
…
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
x86/pkeys: Fix pkeys build breakage for some non-x86 arches
2016-09-13 14:41:36 +02:00
sys.c
mm: private anonymous memory build fixes for 4.4
2016-10-24 23:41:21 +08:00
sysctl_binary.c
sysctl: add cold_boot sysctl entry
2017-01-11 13:57:41 -08:00
sysctl.c
sched/hmp: Enhance co-location and scheduler boost features
2017-02-07 14:51:21 -08:00
task_work.c
task_work: use READ_ONCE/lockless_dereference, avoid pi_lock if !task_works
2016-08-02 19:35:02 -04:00
taskstats.c
taskstats: fix the length of cgroupstats_cmd_get_policy
2016-11-03 16:55:58 -04:00
test_kprobes.c
…
torture.c
torture: Convert torture_shutdown() to hrtimer
2016-08-22 10:01:49 -07:00
tracepoint.c
kernel/...: convert pr_warning to pr_warn
2016-03-22 15:36:02 -07:00
tsacct.c
time, acct: Drop irq save & restore from __acct_update_integrals()
2016-02-29 09:53:09 +01:00
ucount.c
mntns: Add a limit on the number of mount namespaces.
2016-08-31 07:28:35 -05:00
uid16.c
cred: simpler, 1D supplementary groups
2016-10-07 18:46:30 -07:00
up.c
smp: Add function to execute a function synchronously on a CPU
2016-09-05 13:52:39 +02:00
user_namespace.c
Merge branch 'nsfs-ioctls' into HEAD
2016-09-22 20:00:36 -05:00
user-return-notifier.c
…
user.c
…
utsname_sysctl.c
…
utsname.c
Merge branch 'nsfs-ioctls' into HEAD
2016-09-22 20:00:36 -05:00
watchdog.c
sched: Ensure watchdog is enabled before disabling
2017-02-07 14:51:14 -08:00
workqueue_internal.h
sched/core: Get rid of 'cpu' argument in wq_worker_sleeping()
2016-03-02 10:28:47 -05:00
workqueue.c
kthread: rename probe_kthread_data() to kthread_probe_data()
2016-10-11 15:06:33 -07:00