[PATCH 3/4] sched: change thread_group_cputime() to use for_each_thread()

[Oleg Nesterov]

Change thread_group_cputime() to use for_each_thread() instead of
buggy while_each_thread(). This also makes the pid_alive() check
unnecessary.

Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
---
 kernel/sched/cputime.c |   10 ++--------
 1 files changed, 2 insertions(+), 8 deletions(-)

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 @@ void thread_group_cputime(struct task_struct *tsk, struct task_cputime *times)
 	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();
 }
 
-- 
1.5.5.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/