From: Greg KH <greg@kroah.com>
To: linux-hotplug@vger.kernel.org
Subject: Re: udev 092 with kernel 2.6.10? (version neutral simple api)
Date: Fri, 02 Mar 2007 20:21:03 +0000 [thread overview]
Message-ID: <20070302202103.GA23810@kroah.com> (raw)
In-Reply-To: <556445368AFA1C438794ABDA8901891C03445753@usa0300ms03.na.xerox.net>
On Fri, Mar 02, 2007 at 12:34:21PM -0500, Leisner, Martin wrote:
> After a number of gyrations, I got udev 092 working with 2.6.10 (and it
> looks like its
> working pretty good).
>
> After running a number of udevs I found newer udevs have improved
> logging/debugging
> facility over older udevs. I found udevmonitor to be very useful.
>
> Can someone explain why the API changed between various kernel versions?
> (i.e. removed class_simple).
Internal kernel apis change all the time. I changed this as the
"simple" stuff wasn't really necessary, in fact the whole class_device
stuff is being deprecated now, so I would not recommend using it
anymore. Just use a struct device instead.
> I wrapped the api changes into a header file and I ported some of the
> ldd3 examples to udev...
> I have a little tutorial on udev to pass around at work...
>
> Writing device drivers to use udev seems very easy...but I had a great
> deal of difficulty finding
> a cookbook approach to "making udev work".
There's two different things here, writing kernel code so that udev will
work properly, and getting udev to work in userspace.
If you are referring to the kernel code, just look at the
drivers/char/mem.c code for a very simple example of how to do this in
the chr_dev_init() function.
thanks,
greg k-h
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next prev parent reply other threads:[~2007-03-02 20:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-02 17:34 udev 092 with kernel 2.6.10? (version neutral simple api) Leisner, Martin
2007-03-02 20:21 ` Greg KH [this message]
2007-03-02 20:23 ` Greg KH
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