linux-kernel - Re: [PATCH] ldisc: new dcd_change() method for line disciplines.

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Date:	Fri, 28 Nov 2008 13:58:37 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Tilman Schmidt <tilman@...p.cc>
Cc:	Rodolfo Giometti <giometti@...ux.it>, linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Dave Jones <davej@...hat.com>, Sam Ravnborg <sam@...nborg.org>,
	Greg KH <greg@...ah.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Kay Sievers <kay.sievers@...y.org>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...e.hu>,
	Michael Kerrisk <mtk.manpages@...il.com>
Subject: Re: [PATCH] ldisc: new dcd_change() method for line disciplines.

On Fri, 28 Nov 2008 12:39:16 +0100
Tilman Schmidt <tilman@...p.cc> wrote:

> Rodolfo Giometti schrieb:
> > --- a/include/linux/tty_ldisc.h
> > +++ b/include/linux/tty_ldisc.h
> > @@ -99,11 +99,19 @@
> >   *	cease I/O to the tty driver. Can sleep. The driver should
> >   *	seek to perform this action quickly but should wait until
> >   *	any pending driver I/O is completed.
> > + *
> > + * void (*dcd_change)(struct uart_port *port, unsigned int status,
> > + * 			struct timespec *ts)
> > + *
> > + *	Tells the discipline that the DCD pin has changed its status and
> > + *	the relative timestamp. Pointer ts can be NULL.
> >   */
> 
> I don't see an actual call to that new method getting added anywhere.
> Is that planned for a later patch?

Its used in one of the later patches of the set.
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