do_wait() optimization: do not place sub-threads on task_struct->children list

[mirror_ubuntu-zesty-kernel.git] / fs / exec.c

diff --git a/fs/exec.c b/fs/exec.c
index 623a5cc3076a114af8808ca030f04bdd82638829..77db9a97a773fff7ee88e1be4c65bb18347ae15c 100644 (file)
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -826,7 +826,9 @@ static int de_thread(struct task_struct *tsk)
                attach_pid(tsk, PIDTYPE_PID,  task_pid(leader));
                transfer_pid(leader, tsk, PIDTYPE_PGID);
                transfer_pid(leader, tsk, PIDTYPE_SID);
+
                list_replace_rcu(&leader->tasks, &tsk->tasks);
+               list_replace_init(&leader->sibling, &tsk->sibling);
 
                tsk->group_leader = tsk;
                leader->group_leader = tsk;