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Date: Fri, 10 Aug 2012 15:39:16 +0200
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From: Ed Schouten <ed@80386.nl>
To: Hans Petter Selasky <hselasky@c2i.net>
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Cc: Konstantin Belousov <kostikbel@gmail.com>, freebsd-current@freebsd.org
Subject: Re: ttydev_cdevsw has no d_purge
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Hi Hans,

2012/8/9 Hans Petter Selasky <hselasky@c2i.net>:
> 1) Use unrhdr. Suggested by ed.

Thanks!

> 2) Implement tty_set_softc() and use that when dereffing ucom unit numbers.

We're getting there. Now that I think of it, if we want to go in this
direction, we might as well do the following:

- Simply call tty_alloc() -- not tty_alloc_mutex(). I'd rather get rid
of this functionality altogether, if possible.
- Use the TTY mutex to lock down the state of the ucom driver, e.g.
#define ucom_lock(sc) tty_lock(sc->sc_mtx).

Any thoughts?

-- 
Ed Schouten <ed@80386.nl>