From: Zhang Qiang <[email protected]> Before the work is put into the queue of the worker thread, the state of the worker thread needs to be detected,because the worker thread may be in the destruction state at this time.
Signed-off-by: Zhang Qiang <[email protected]> Suggested-by: Petr Mladek <[email protected]> Reviewed-by: Petr Mladek <[email protected]> --- v1->v2: Add warning information for condition "!worker->task". v2->v3: Modify submission information and add "Reviewed-by" tags. kernel/kthread.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/kthread.c b/kernel/kthread.c index bfbfa481be3a..cac5184ffd86 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -791,6 +791,9 @@ static inline bool queuing_blocked(struct kthread_worker *worker, { lockdep_assert_held(&worker->lock); + if (WARN_ON(!worker->task)) + return true; + return !list_empty(&work->node) || work->canceling; } -- 2.24.1
