From mboxrd@z Thu Jan  1 00:00:00 1970
From: Alan Cox <alan@linux.intel.com>
Subject: Re: [PATCH] tty: Correct tty buffer flushing.
Date: Thu, 29 Nov 2012 21:28:09 +0000
Message-ID: <20121129212809.5bc12088@bob.linux.org.uk>
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To: Ilya Zykov <ilya@ilyx.ru>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, Xiaobing Tu <xiaobing.tu@intel.com>, Jiri Slaby <jslaby@suse.cz>, Alek Du <alek.du@intel.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org

> Sorry, In you reply not all patch.
> Main idea here -  we never flash last (struct tty_buffer) in the
> active buffer. Only data for ldisc. (tty->buf.head->read =
> tty->buf.head->commit). At that moment driver can collect(write) data
> in buffer without conflict.

Ah.. now I understand. Yes that makes sense.  I will think about that
carefully. This is why a good explanation with a patch is important.