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| author | Qais Yousef <qais.yousef@arm.com> | 2020-07-16 12:03:47 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-07-29 13:51:47 +0200 |
| commit | e65855a52b479f98674998cb23b21ef5a8144b04 (patch) | |
| tree | ea641813091126bbc0d7ef4ec02b938cbe8488d8 /kernel/fork.c | |
| parent | 21a6ee14a8f277766618ef07154432b46528113e (diff) | |
| download | linux-e65855a52b479f98674998cb23b21ef5a8144b04.tar.gz | |
sched/uclamp: Fix a deadlock when enabling uclamp static key
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: 46609ce22703 ("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
Diffstat (limited to 'kernel/fork.c')
0 files changed, 0 insertions, 0 deletions