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    Subject[PATCH 10/10] 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>
    ---
    kernel/kthread.c | 7 +++++--
    1 file changed, 5 insertions(+), 2 deletions(-)

    diff --git a/kernel/kthread.c b/kernel/kthread.c
    index 8e5f44bed027..9c6c532047c4 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);
    --
    2.29.2
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