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SubjectRe: [PATCH][RESEND 3] disassociate_ctty SMP fix
Rik van Riel <riel@conectiva.com.br> wrote:
>
> ===== drivers/char/tty_io.c 1.55 vs edited =====
> --- 1.55/drivers/char/tty_io.c Tue Jan 14 23:37:20 2003
> +++ edited/drivers/char/tty_io.c Tue Feb 4 23:02:52 2003
> @@ -425,19 +425,21 @@
> */
> void do_tty_hangup(void *data)
> {
> - struct tty_struct *tty = (struct tty_struct *) data;
> + struct tty_struct *tty;
> struct file * cons_filp = NULL;
> struct task_struct *p;
> struct list_head *l;
> struct pid *pid;
> int closecount = 0, n;
>
> - if (!tty)
> - return;
> -
> /* inuse_filps is protected by the single kernel lock */
> lock_kernel();
> -
> + tty = (struct tty_struct *) data;
> + if (!tty) {
> + unlock_kernel();
> + return;
> + }
> +
> check_tty_count(tty, "do_tty_hangup");
> file_list_lock();
> for (l = tty->tty_files.next; l != &tty->tty_files; l = l->next) {

This part is a no-op...

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