linux-kernel - Re: [GIT PATCH] UIO patches for 2.6.21

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Message-ID: <20070428211515.4e9fd8c5@the-village.bc.nu>
Date:	Sat, 28 Apr 2007 21:15:15 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Hans-Jürgen Koch <hjk@...utronix.de>
Cc:	Bill Davidsen <davidsen@....com>, Greg KH <gregkh@...e.de>,
	Linus Torvalds <torvalds@...l.org>,
	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	tglx@...utronix.de, Benedikt Spranger <b.spranger@...utronix.de>
Subject: Re: [GIT PATCH] UIO patches for 2.6.21

> > I have a political question, if I have a user space driver, is my kernel 
> > tainted or not? 
> 
> Surely not. By using the kernel's userspace interface, you create no
> "derived work" of the kernel. See COPYING in the root directory of the 
> kernel sources for details.

That only covers normal system calls - but I don't think thats what is
relevant, taints are for debug assistance not politics.

I think we should have a taint flag for UIO type drivers. Not for any
licensing or political reason but for the simple fact it means that there
may be other complexities to debugging - and not the same one as a binary
module. Probably we want the same marker for mmap /dev/mem too.

Alan
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