From: Oleg Nesterov <oleg@redhat.com>
Date: Mon, 21 Jan 2013 19:48:17 +0000 (+0100)
Subject: wake_up_process() should be never used to wakeup a TASK_STOPPED/TRACED task
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9067ac85d533;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

wake_up_process() should be never used to wakeup a TASK_STOPPED/TRACED task

wake_up_process() should never wakeup a TASK_STOPPED/TRACED task.
Change it to use TASK_NORMAL and add the WARN_ON().

TASK_ALL has no other users, probably can be killed.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 257002c13bb0..26058d0bebba 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1523,7 +1523,8 @@ out:
  */
 int wake_up_process(struct task_struct *p)
 {
-	return try_to_wake_up(p, TASK_ALL, 0);
+	WARN_ON(task_is_stopped_or_traced(p));
+	return try_to_wake_up(p, TASK_NORMAL, 0);
 }
 EXPORT_SYMBOL(wake_up_process);