linux-kernel - Re: [RFC PATCH 4/5] hvc_console: Add tty window resizing

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Message-ID: <20081014171408.228e681b@lxorguk.ukuu.org.uk>
Date:	Tue, 14 Oct 2008 17:14:08 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>
Cc:	Hendrik Brueckner <brueckner@...ux.vnet.ibm.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Linux PPC devel <linuxppc-dev@...abs.org>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	"Ryan S. Arnold" <rsa@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: Re: [RFC PATCH 4/5] hvc_console: Add tty window resizing

> Since tty_do_resize() cannot be called holding the hp spinlock; the code uses
> now tty_kref_get/put to keep track of the tty object. I am not sure if the
> use of the kref's is correct here, so please let me know if there is a better
> solution.

That looks right to me, hp->tty can go NULL but the tty object itself
will still have a reference even if the asynchronous events kick off late

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