On 08/23/2011 07:36 PM, gregkh@suse.de wrote:
> diff --git a/include/linux/tty.h b/include/linux/tty.h
> index 44bc0c5..6d5eceb 100644
> --- a/include/linux/tty.h
> +++ b/include/linux/tty.h
> @@ -600,8 +600,6 @@ extern long vt_compat_ioctl(struct tty_struct *tty,
>  /* functions for preparation of BKL removal */
>  extern void __lockfunc tty_lock(void) __acquires(tty_lock);
>  extern void __lockfunc tty_unlock(void) __releases(tty_lock);
> -extern struct task_struct *__big_tty_mutex_owner;
> -#define tty_locked()		(current == __big_tty_mutex_owner)

It looks like I need tty_locked to fix system stalls in
tty_wait_until_sent in the end. Like with the patch attached. But if
someone finds another way to fix this in short-term, it would be great.

thanks,
-- 
js
suse labs