Don't allow preemption to change task state.

faaadc0c · Linus Torvalds · 5e4b5079 · faaadc0c
Commit faaadc0c authored Apr 03, 2002 by Linus Torvalds
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kernel/sched.c kernel/sched.c +2 -1

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--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -843,7 +843,8 @@ asmlinkage void preempt_schedule(void)
 {
 	if (unlikely(preempt_get_count()))
 		return;
-	current->state = TASK_RUNNING;
+	if (current->state != TASK_RUNNING)
+		return;
 	schedule();
 }
 #endif /* CONFIG_PREEMPT */