linux-kernel - Re: ioctl32: Unknown cmd

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Message-ID: <p73wstmy4cv.fsf@crumb.suse.de>
Date:	17 Oct 2007 02:25:20 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	David Miller <davem@...emloft.net>
Cc:	arnd@...db.de, Geert.Uytterhoeven@...ycom.com,
	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	jens.axboe@...cle.com
Subject: Re: ioctl32: Unknown cmd

David Miller <davem@...emloft.net> writes:

> From: Arnd Bergmann <arnd@...db.de>
> Date: Tue, 16 Oct 2007 21:50:35 +0200
> 
> > The one point where it is expected to have changed now is when you
> > try to do these ioctls on something that is not a block device. Are
> > you sure that the files you tried them on were created correctly?
> 
> Many many many programs do this exact sort of thing.
> 
> It is one of the bad aspects of moving the compat handling
> down into the file ops for a specific device.

When this happens one should add respective IGNORE_IOCTL()s to 
compat_ioctl.c

-Andi
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