linux-kernel - Re: [PATCH] serial: DCC(JTAG) serial and console emulation support

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Message-ID: <20101007211513.GB26660@suse.de>
Date:	Thu, 7 Oct 2010 14:15:13 -0700
From:	Greg KH <gregkh@...e.de>
To:	Daniel Walker <dwalker@...eaurora.org>
Cc:	Alan Cox <alan@...rguk.ukuu.org.uk>, linux-kernel@...r.kernel.org,
	"Hyok S. Choi" <hyok.choi@...sung.com>,
	Tony Lindgren <tony@...mide.com>,
	Jeff Ohlstein <johlstei@...cinc.com>,
	Ben Dooks <ben-linux@...ff.org>,
	Alan Cox <alan@...ux.intel.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Mike Frysinger <vapier@...too.org>,
	Feng Tang <feng.tang@...el.com>,
	Tobias Klauser <tklauser@...tanz.ch>,
	Jason Wessel <jason.wessel@...driver.com>,
	Philippe Langlais <philippe.langlais@...ricsson.com>
Subject: Re: [PATCH] serial: DCC(JTAG) serial and console emulation support

On Thu, Oct 07, 2010 at 01:51:18PM -0700, Daniel Walker wrote:
> Your making too many assumptions .. You might be able to modify the
> kernel, and not the userspace. So you couldn't tweak the device
> creation .. It's much easier in the server world ..

You're saying it's easier to replace an embedded kernel than a userspace
file on an embedded system?  Heh, that's funny.

And no, it's not easier to repace a kernel on a "server" than a
userspace file, due to all sorts of good reasons (certifications,
support contracts, etc...)

> > We've said no over a period of about ten years to a lot of attempts to
> > just borrow the ttyS0 range. If we'd said yes it would have been a
> > complete mess by now.
> > 
> > So the answer is no.
> 
> Nothing can be unilateral, there's always room for exceptions. You
> should say something more like "it's possible, but unlikely".

Hm, how about this, as the TTY and serial driver[1] maintainer, I will
not accept this kind of patch at all.

Is that final enough for you?

thanks,

greg k-h

[1] http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/gregkh-06-tty/serial-mark-the-8250-driver-as-maintained.patch
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