linux-kernel - Re: [Device-mainlining] [PATCH v4 1/5] gadget: Introduce the notifier functions

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Message-ID: <CAJAp7Oj-O+s7V1KjpFm-UWOP6ecCWoBzXZnHhLuC8E3_Wu3ksg@mail.gmail.com>
Date:	Wed, 7 Oct 2015 09:44:38 -0700
From:	Bjorn Andersson <bjorn@...o.se>
To:	Felipe Balbi <balbi@...com>
Cc:	Mark Brown <broonie@...nel.org>,
	"patches@...nsource.wolfsonmicro.com" 
	<patches@...nsource.wolfsonmicro.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Baolin Wang <baolin.wang@...aro.org>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	Greg KH <gregkh@...uxfoundation.org>,
	yoshihiro.shimoda.uh@...esas.com, linux-usb@...r.kernel.org,
	r.baldyga@...sung.com, Sebastian Reichel <sre@...nel.org>,
	sojka@...ica.cz, stern@...land.harvard.edu,
	peter.chen@...escale.com, linux-pm@...r.kernel.org,
	device-mainlining@...ts.linuxfoundation.org,
	Lee Jones <lee.jones@...aro.org>,
	David Woodhouse <dwmw2@...radead.org>,
	ckeepax@...nsource.wolfsonmicro.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [Device-mainlining] [PATCH v4 1/5] gadget: Introduce the notifier functions

On Fri, Oct 2, 2015 at 10:23 AM, Felipe Balbi via device-mainlining
<device-mainlining@...ts.linuxfoundation.org> wrote:
[..]
> The real difficulty here is coming up with an interface which we're agreeing to
> supporting for the next 30 years. Whatever that is, as soon as it gets exposed
> to userland, we will have to support it.
>

Isn't this the main reason for not creating a user space ABI now?

Running with the in-kernel hooks would allow us to get things working
now, we can change it as we wish, we can explore the difficulties and
we can create an ABI from that - if we need to - that might have a
chance to work for the next 30 years.

Regards,
Bjorn
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