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Date: Mon, 18 May 2015 10:36:05 -0700
From: Christoph Hellwig <hch@infradead.org>
To: Stephen Hemminger <stephen@networkplumber.org>
Cc: "Hans J. Koch" <hjk@hansjkoch.de>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] uio: add support for ioctl
Message-ID: <20150518173605.GA30744@infradead.org>
References: <20150518103136.73e48906@urahara>
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On Mon, May 18, 2015 at 10:31:36AM -0700, Stephen Hemminger wrote:
> Allow UIO device specific driver to provide ioctl interface.
> This mechanism is used in DPDK uio_msi driver to allow creating
> VFIO like events.

I can't find that driver anywhere in the kernel tree, and there is no
point adding new hooks just for out of tree code that doesn't even
get tested in tree.