Re: kernel oops!

[ierdnah <ierdnah@xxxxx>]

On Sun, 2005-01-23 at 09:51 -0800, Linus Torvalds wrote:

I applied the patch and the uptime is 1 day and no oops, i will wait 2
more days too see if the oops appears, then I will compile the kernel
with CONFIG_PREEMPT. Before, when PREEMPT was enabled, the oops appeared
immediatly after booting and more often.

> ----
> --- 1.32/drivers/char/pty.c	2005-01-10 17:29:36 -08:00
> +++ edited/drivers/char/pty.c	2005-01-23 09:49:16 -08:00
> @@ -149,13 +149,15 @@
>  static int pty_chars_in_buffer(struct tty_struct *tty)
>  {
>  	struct tty_struct *to = tty->link;
> +	ssize_t (*chars_in_buffer)(struct tty_struct *);
>  	int count;
>  
> -	if (!to || !to->ldisc.chars_in_buffer)
> +	/* We should get the line discipline lock for "tty->link" */
> +	if (!to || !(chars_in_buffer = to->ldisc.chars_in_buffer))
>  		return 0;
>  
>  	/* The ldisc must report 0 if no characters available to be read */
> -	count = to->ldisc.chars_in_buffer(to);
> +	count = chars_in_buffer(to);
>  
>  	if (tty->driver->subtype == PTY_TYPE_SLAVE) return count;
>  
> 
-- 
ierdnah <ierdnah@xxxxx>

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