linux-kernel - Re: [v4l-dvb-maintainer] [PATCH] DVB: Delete unused header file linux/dvb/version.h.

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Date:	Sun, 25 Mar 2007 11:11:19 +0200
From:	Arjan van de Ven <arjan@...radead.org>
To:	Manu Abraham <abraham.manu@...il.com>
Cc:	Marcel Siegert <mws@...uxtv.org>, Andrew Morton <akpm@...l.org>,
	v4l-dvb-maintainer@...uxtv.org,
	"Robert P. J. Day" <rpjday@...dspring.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [v4l-dvb-maintainer] [PATCH] DVB: Delete unused header file
	linux/dvb/version.h.



> There are cases where we need an API update since newer systems do show up.
> In such a case, the only way is to provide backward compatibility
> while adding in newer stuff.
> 
> Currently we use the version major/minor for the userspace to identify
> the in kernel API, while the userspace apps can remain binary
> compatible

this is the problem exactly! Your userspace binary knows about the
kernel headers it was compiled against, not about the actual running
kernel! They are very likely not the same.

-- 
if you want to mail me at work (you don't), use arjan (at) linux.intel.com
Test the interaction between Linux and your BIOS via http://www.linuxfirmwarekit.org

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