From mboxrd@z Thu Jan  1 00:00:00 1970
From: Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [Bug #14388] keyboard under X with 2.6.31
Date: Wed, 14 Oct 2009 08:07:36 -0700 (PDT)
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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Paul Fulghum <paulkf@microgate.com>, Boyan <btanastasov@yahoo.co.uk>, "Rafael J. Wysocki" <rjw@sisk.pl>, Linux Kernel Mailing List <linux-kernel@vger.kernel.org>, Kernel Testers List <kernel-testers@vger.kernel.org>, Dmitry Torokhov <dmitry.torokhov@gmail.com>, Ed Tomlinson <edt@aei.ca>, "OGAWA Hirofumi \"" <hirofumi@mail.parknet.co.jp>



On Wed, 14 Oct 2009, Alan Cox wrote:
>
> Stop a moment. The code wasn't designed to permit two paralle calls of
> flush_to_ldisc to the same tty. That was always forbidden when that code
> was designed.

No, the code was clearly _designed_ for it - that's the whole and only 
point of the

	tty->buf.head = NULL;

line.

But it's certainly true that it just never happened before. At least for 
the !low_latency case, I'm not so sure about the low_latency=1 case, but I 
haven't checked either - it would depend on any higher-level 
serialization.

		Linus