[PATCH v2 3/5] pid: use task_alive() in __change_pid()

Replace hlist_empty() with the new task_alive() helper which is more
idiomatic, easier to grep for, and unifies how callers perform this
check.

Cc: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Christian Brauner <redacted>
---
/* v1 */
patch not present

/* v2 */
patch introduced
---
 kernel/pid.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/pid.c b/kernel/pid.c
index 0a9f2e437217..70ad4a9f728c 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c

@@ -299,7 +299,7 @@ static void __change_pid(struct task_struct *task, enum pid_type type,
 	*pid_ptr = new;
 
 	for (tmp = PIDTYPE_MAX; --tmp >= 0; )
-		if (!hlist_empty(&pid->tasks[tmp]))
+		if (task_alive(pid, tmp))
 			return;
 
 	free_pid(pid);

-- 
2.23.0