From: Eric W. Biederman <ebiederm@xmission.com>
Date: Fri, 3 Dec 2021 17:42:49 +0000 (-0600)
Subject: exit/kthread: Move the exit code for kernel threads into struct kthread
X-Git-Tag: v6.1-rc5~2203^2~31
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6b1248798eb6f6d5285db214299996ecc5dc1e6b;p=platform%2Fkernel%2Flinux-starfive.git

exit/kthread: Move the exit code for kernel threads into struct kthread

The exit code of kernel threads has different semantics than the
exit_code of userspace tasks.  To avoid confusion and allow
the userspace implementation to change as needed move
the kernel thread exit code into struct kthread.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---

diff --git a/kernel/kthread.c b/kernel/kthread.c
index 8e5f44b..9c6c532 100644
--- a/kernel/kthread.c
+++ b/kernel/kthread.c
@@ -52,6 +52,7 @@ struct kthread_create_info
 struct kthread {
 	unsigned long flags;
 	unsigned int cpu;
+	int result;
 	int (*threadfn)(void *);
 	void *data;
 	mm_segment_t oldfs;
@@ -287,7 +288,9 @@ EXPORT_SYMBOL_GPL(kthread_parkme);
  */
 void __noreturn kthread_exit(long result)
 {
-	do_exit(result);
+	struct kthread *kthread = to_kthread(current);
+	kthread->result = result;
+	do_exit(0);
 }
 
 /**
@@ -679,7 +682,7 @@ int kthread_stop(struct task_struct *k)
 	kthread_unpark(k);
 	wake_up_process(k);
 	wait_for_completion(&kthread->exited);
-	ret = k->exit_code;
+	ret = kthread->result;
 	put_task_struct(k);
 
 	trace_sched_kthread_stop_ret(ret);