linux-kernel - Re: [patch 2/5] Staging: vme: add VME userspace driver

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Message-ID: <20090810162826.GA27912@suse.de>
Date:	Mon, 10 Aug 2009 09:28:26 -0700
From:	Greg KH <gregkh@...e.de>
To:	"Emilio G. Cota" <cota@...ap.org>
Cc:	Martyn Welch <martyn.welch@...anuc.com>,
	linux-kernel@...r.kernel.org, devel@...uxdriverproject.org,
	Sebastien Dugue <sebastien.dugue@...l.net>
Subject: Re: [patch 2/5] Staging: vme: add VME userspace driver

On Sun, Aug 09, 2009 at 02:17:16PM +0200, Emilio G. Cota wrote:
> (oops, just correcting Sebastien's e-mail address)
> 
> Emilio G. Cota wrote:
> > I remember we had a look at the vmelinux interface, but it really
> > was so limited that we decided to get rid of it altogether. Do you
> > really think it's worth bringing it back to life? Since it's never
> > been merged into the kernel, why don't we just get it right this time
> > and forget about it?
> > 
> > Instead of using that we implemented a heretic IOCTL-based
> > interface for user-space; at least with it you could create a
> > driver (with no interrupt support) for a device in user-space.

Why not just use the UIO interface instead of creating
yet-another-kernel/user-api?

Will that interface not work for what you want to use here?

thanks,

greg k-h
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