linux-kernel - Re: RFC: out-of-tree tty driver breakage (changing ASYNC

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Message-ID: <5693D72D.6050501@hurleysoftware.com>
Date:	Mon, 11 Jan 2016 08:24:13 -0800
From:	Peter Hurley <peter@...leysoftware.com>
To:	Grant Edwards <grant.b.edwards@...il.com>,
	linux-kernel@...r.kernel.org
Cc:	linux-serial@...r.kernel.org, Greg KH <gregkh@...uxfoundation.org>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Jiri Slaby <jslaby@...e.cz>
Subject: Re: RFC: out-of-tree tty driver breakage (changing ASYNC_ bits)

On 01/11/2016 07:53 AM, Grant Edwards wrote:
> On 2016-01-11, Greg KH <gregkh@...uxfoundation.org> wrote:
>> On Sun, Jan 10, 2016 at 01:42:44PM -0800, Peter Hurley wrote:
>>
>>> This will break out-of-tree drivers but I don't really see a
>>> realistic alternative. Also, I think the new symbol prefix ASY_ isn't
>>> great and I'd like to get some suggestions.
>>
>> Don't worry about breaking out-of-tree drivers, that's fine.
> 
> One request from this maintainer of several out-of-tree drivers: if
> you break something, break it such that it won't compile.  It would be
> nice to avoid changes that break functionality but still compile
> without warning.

I was in the process of writing how I can't remove ASYNC_INITIALIZED, et.al
from the uapi header, when I realized that I can just guard them with
#ifndef _KERNEL_ which will trigger the requisite out-of-tree build
break.

Regards,
Peter Hurley