linux-kernel - Re: [PATCH] tty: avoid recursive BTM in pty

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Message-ID: <20100618172121.528f2e09@lxorguk.ukuu.org.uk>
Date:	Fri, 18 Jun 2010 17:21:21 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Tony Luck <tony.luck@...el.com>, linux-kernel@...r.kernel.org,
	Greg KH <gregkh@...e.de>, Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	John Kacur <jkacur@...hat.com>,
	Al Viro <viro@...iv.linux.org.uk>, Ingo Molnar <mingo@...e.hu>
Subject: Re: [PATCH] tty: avoid recursive BTM in pty_close

> I'd like to get Alan's opinion on whether he considers the change in
> pty.c safe.

I considered it a while ago when trying to work out removing the BKL from
this path. After much head banging and an overwhelming desire to go and
get drunk instead I concluded it wasn't possible to tell by analysis.

So I ack this patch - it's the only way to find out 8)

Alan
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