Re: [PATCH] tty: Correct tty buffer flushing.

[Alan Cox]

> 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.

This one I agree with (sorry it took a while to get to, I wanted to sit
and think carefully about it as it is subtle and clever)

Can you generate a single patch which reverts the unneeded locks and
adds this instead. Add a Signed-off-by and send it to Greg to get it
into 3.8/3.9 somewhere.

Thanks

Alan
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