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Date: Sun, 26 Dec 2004 14:26:53 -0800
From: Chris Wedgwood <cw@f00f.org>
To: Andi Kleen <ak@suse.de>
Cc: "Michael S. Tsirkin" <mst@mellanox.co.il>, Arnd Bergmann <arnd@arndb.de>,
       linux-kernel@vger.kernel.org, pavel@suse.cz, discuss@x86-64.org,
       gordon.jin@intel.com
Subject: Re: unregister_ioctl32_conversion and modules. ioctl32 revisited.
Message-ID: <20041226222653.GB29474@taniwha.stupidest.org>
References: <200412151847.09598.arnd@arndb.de> <20041215182109.GA13539@mellanox.co.il> <20041216040608.GB32718@wotan.suse.de>
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On Thu, Dec 16, 2004 at 05:06:08AM +0100, Andi Kleen wrote:

> > But what if you really wanted to return -ENOIOCTLCMD?
>
> It's an internal error code as Arnd pointed out.

can we be sure this will never escape to userspace?  i can think of
somewhere else we already do this (EFSCORRUPTED) and it does (somewhat
deliberately escape to userspace) and this causes confusion from time
to time when applications see 'errno == 990'