linux-kernel - Re: [PATCH] HID: removing obsolete kone_abi

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Message-ID: <alpine.LNX.2.00.1006211405110.13809@pobox.suse.cz>
Date:	Mon, 21 Jun 2010 14:06:05 +0200 (CEST)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Stefan Achatz <erazor_de@...rs.sourceforge.net>
Cc:	Randy Dunlap <rdunlap@...otime.net>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Tejun Heo <tj@...nel.org>, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org
Subject: Re: [PATCH] HID: removing obsolete kone_abi_version sysfs attr for
 roccat kone

On Fri, 18 Jun 2010, Stefan Achatz wrote:

> The newest version of the accompanying userland tools cuts backward
> compatibility and uses libudev to find its devices superseding the
> quirky kone_abi_version sysfs attribute. Therefore it should be removed.

How backwards incompatible this change actually is?

What happens if you run old userspace tool (the one which looks for 
kone_abi_version) on a kernel with this patch applied?

Thanks,

-- 
Jiri Kosina
SUSE Labs, Novell Inc.
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