linux-kernel - Re: How do I choose an arbitrary minor number for my tty device?

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Message-ID: <20101201010011.GB31571@kroah.com>
Date:	Tue, 30 Nov 2010 17:00:11 -0800
From:	Greg KH <greg@...ah.com>
To:	Timur Tabi <timur@...escale.com>
Cc:	Michael Ellerman <michael@...erman.id.au>,
	Greg KH <gregkh@...e.de>, Scott Wood <scottwood@...escale.com>,
	Arnd Bergmann <arnd@...db.de>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Stuart Yoder <stuart.yoder@...escale.com>
Subject: Re: How do I choose an arbitrary minor number for my tty device?

On Tue, Nov 30, 2010 at 01:33:52PM -0600, Timur Tabi wrote:
> Greg KH wrote:
> >>> > > When this function is called, userspace had better know exactly what is
> >>> > > going on as it can get confused due to the lack of uevents happening.
> >> > 
> >> > Thanks for the explanation, but I'm just concerned that you'll add a comment
> >> > that says, "don't call this function".  A quick grep will show that there are
> >> > users of this function, and we'll have this exact conversation all over again.
> > Care to turn the above into a patch?  I'll be glad to apply that as well
> 
> One question: why are uevents not happening?

What uevent would describe this?  Userspace asked for the rename to
happen, so it better be aware that it did.

We don't want to do a "remove" and then "add" sequence of events, that
would confuse everyone.

thanks,

greg k-h
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