Qais Yousef b4c53155de sched/uclamp: Fix a deadlock when enabling uclamp static key ...

[ Upstream commit e65855a52b ]

The following splat was caught when setting uclamp value of a task:

  BUG: sleeping function called from invalid context at ./include/linux/percpu-rwsem.h:49

   cpus_read_lock+0x68/0x130
   static_key_enable+0x1c/0x38
   __sched_setscheduler+0x900/0xad8

Fix by ensuring we enable the key outside of the critical section in
__sched_setscheduler()

Fixes: 46609ce227 ("sched/uclamp: Protect uclamp fast path code with static key")
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200716110347.19553-4-qais.yousef@arm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>

2020-08-21 13:15:12 +02:00

..

autogroup.c

sched/autogroup: Make autogroup_path() always available

2019-06-24 19:23:40 +02:00

autogroup.h

sched/headers: Simplify and clean up header usage in the scheduler

2018-03-04 12:39:29 +01:00

clock.c

sched/clock: Use static_branch_likely() with sched_clock_running

2019-11-29 08:10:54 +01:00

completion.c

completion: Use lockdep_assert_RT_in_threaded_ctx() in complete_all()

2020-03-23 18:40:25 +01:00

core.c

sched/uclamp: Fix a deadlock when enabling uclamp static key

2020-08-21 13:15:12 +02:00

cpuacct.c

sched/cpuacct: Fix charge cpuacct.usage_sys

2020-05-19 20:34:14 +02:00

cpudeadline.c

Merge tag 'v5.2-rc5' into sched/core, to pick up fixes

2019-06-17 12:12:27 +02:00

cpudeadline.h

sched/headers: Simplify and clean up header usage in the scheduler

2018-03-04 12:39:29 +01:00

cpufreq_schedutil.c

sched/uclamp: Protect uclamp fast path code with static key

2020-08-21 13:15:06 +02:00

cpufreq.c

cpufreq: Avoid leaving stale IRQ work items during CPU offline

2019-12-12 17:59:43 +01:00

cpupri.c

sched/rt: cpupri_find: Trigger a full search as fallback

2020-03-20 13:06:20 +01:00

cpupri.h

sched/rt: Optimize cpupri_find() on non-heterogenous systems

2020-03-06 12:57:27 +01:00

cputime.c

sched/vtime: Work around an unitialized variable warning

2020-04-15 11:06:50 +02:00

deadline.c

sched/deadline: Initialize ->dl_boosted

2020-06-28 17:01:20 +02:00

debug.c

sched: Add rq::ttwu_pending

2020-05-28 10:54:16 +02:00

fair.c

sched/fair: Fix NOHZ next idle balance

2020-08-19 08:26:04 +02:00

features.h

sched/fair/util_est: Implement faster ramp-up EWMA on utilization increases

2019-10-29 10:01:07 +01:00

idle.c

cpuidle: Rearrange s2idle-specific idle state entry code

2020-06-25 13:52:53 +02:00

isolation.c

sched/isolation: Allow "isolcpus=" to skip unknown sub-parameters

2020-04-15 10:38:26 +02:00

loadavg.c

timers/nohz: Update NOHZ load in remote tick

2020-01-28 21:36:44 +01:00

Makefile

kcsan: Improve various small stylistic details

2019-11-20 10:47:23 +01:00

membarrier.c

membarrier: Fix RCU locking bug caused by faulty merge

2019-10-01 21:27:50 +02:00

pelt.c

sched/pelt: Sync util/runnable_sum with PELT window when propagating

2020-05-19 20:34:14 +02:00

pelt.h

sched/pelt: Add support to track thermal pressure

2020-03-06 12:57:17 +01:00

psi.c

psi: Move PF_MEMSTALL out of task->flags

2020-03-20 13:06:19 +01:00

rt.c

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

2020-06-03 16:27:18 -07:00

sched-pelt.h

sched/fair: Fix "runnable_avg_yN_inv" not used warnings

2019-06-17 12:15:58 +02:00

sched.h

sched/uclamp: Protect uclamp fast path code with static key

2020-08-21 13:15:06 +02:00

smp.h

sched/headers: Split out open-coded prototypes into kernel/sched/smp.h

2020-05-28 11:03:20 +02:00

stats.c

proc: introduce proc_create_seq{,_data}

2018-05-16 07:23:35 +02:00

stats.h

psi: Move PF_MEMSTALL out of task->flags

2020-03-20 13:06:19 +01:00

stop_task.c

sched/core: Further clarify sched_class::set_next_task()

2019-11-11 08:35:21 +01:00

swait.c

sched/swait: Prepare usage in completions

2020-03-21 16:00:23 +01:00

topology.c

sched: correct SD_flags returned by tl->sd_flags()

2020-08-19 08:26:04 +02:00

wait_bit.c

sched/wait: fix ___wait_var_event(exclusive)

2019-12-17 13:32:50 +01:00

wait.c

Add wake_up_interruptible_sync_poll_locked()

2019-10-31 15:12:23 +00:00