[patch 2/5] Staging: vme: add VME userspace driver

Greg KH gregkh at suse.de
Mon Aug 10 21:09:38 UTC 2009

On Mon, Aug 10, 2009 at 10:05:26PM +0200, Emilio G. Cota wrote:
> Greg KH wrote:
> > On Sun, Aug 09, 2009 at 02:17:16PM +0200, Emilio G. Cota wrote:
> > > > 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?
> Certainly. I didn't mean we'd like to see that merged. Currently
> we make extensive use of IOCTLs because we are maintaining
> kernel and user-space code for two platforms/OSes (ppc-lynx and
> x86-linux), and not having access to lynx' source code doesn't
> help. So IOCTLs are pretty much everywhere, much to my regret.

That does not mean we will accept adding new ioctls for the Linux
drivers, so I fail to see the point of this :)


greg k-h

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