From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Thu, 17 Oct 2019 10:18:31 +0000 (+0200)
Subject: exit: use pid_has_task() in do_wait()
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=1722c14a2097634a7ba37000c0ec7d9409918b64;p=linux.git

exit: use pid_has_task() in do_wait()

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

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Link: https://lore.kernel.org/r/20191017101832.5985-4-christian.brauner@ubuntu.com
---

diff --git a/kernel/exit.c b/kernel/exit.c
index a46a50d67002d..f2d20ab744227 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -1457,7 +1457,7 @@ repeat:
 	 */
 	wo->notask_error = -ECHILD;
 	if ((wo->wo_type < PIDTYPE_MAX) &&
-	   (!wo->wo_pid || hlist_empty(&wo->wo_pid->tasks[wo->wo_type])))
+	   (!wo->wo_pid || !pid_has_task(wo->wo_pid, wo->wo_type)))
 		goto notask;
 
 	set_current_state(TASK_INTERRUPTIBLE);