linux-kernel - Re: speakup bug

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Message-ID: <20120304014122.GA4333@thunk.org>
Date:	Sat, 3 Mar 2012 20:41:23 -0500
From:	Ted Ts'o <tytso@....edu>
To:	Samuel Thibault <samuel.thibault@...-lyon.org>,
	"John G. Heim" <jheim@...h.wisc.edu>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linux-kernel@...r.kernel.org
Subject: Re: speakup bug

On Sun, Mar 04, 2012 at 01:43:48AM +0100, Samuel Thibault wrote:
> 
> Sure!  But there should be a way to do it without /, just like the
> serial console works on ttyUSB0 without /.

It's not impossible, but the hard part will be creating a naming
infrastructure so the user can specify the appropriate serial port if
there are multiple (non-console) tty devices present on the system.

My suggestion would be to get it working using a userspace daemon, and
then putting in the kernel code to open the serial port without a file
system.  It certainly can be done, with roughly the same techniques
that are used to mount the root file system in the non-initrd case.

     	      	       	   	     - Ted
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