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-rw-r--r--kernel/freezer.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/freezer.c b/kernel/freezer.c
index 44bbd7dbd2c8..8d530d0949ff 100644
--- a/kernel/freezer.c
+++ b/kernel/freezer.c
@@ -109,7 +109,12 @@ static int __set_task_frozen(struct task_struct *p, void *arg)
{
unsigned int state = READ_ONCE(p->__state);
- if (p->on_rq)
+ /*
+ * Allow freezing the sched_delayed tasks; they will not execute until
+ * ttwu() fixes them up, so it is safe to swap their state now, instead
+ * of waiting for them to get fully dequeued.
+ */
+ if (task_is_runnable(p))
return 0;
if (p != current && task_curr(p))