diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index 72fdf06..3e52836 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -294,18 +294,12 @@
 	times->sum_exec_runtime = sig->sum_sched_runtime;
 
 	rcu_read_lock();
-	/* make sure we can trust tsk->thread_group list */
-	if (!likely(pid_alive(tsk)))
-		goto out;
-
-	t = tsk;
-	do {
+	for_each_thread(tsk, t) {
 		task_cputime(t, &utime, &stime);
 		times->utime += utime;
 		times->stime += stime;
 		times->sum_exec_runtime += task_sched_runtime(t);
-	} while_each_thread(tsk, t);
-out:
+	}
 	rcu_read_unlock();
 }