linux-kernel - Re: char: make misc_deregister a void function

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Date:	Thu, 30 Jul 2015 19:41:57 -0400
From:	Mike Snitzer <snitzer@...hat.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	Alasdair Kergon <agk@...hat.com>, Neil Brown <neilb@...e.com>,
	Alessandro Zummo <a.zummo@...ertech.it>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	Oleg Drokin <oleg.drokin@...el.com>,
	Andreas Dilger <andreas.dilger@...el.com>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Wim Van Sebroeck <wim@...ana.be>,
	Christine Caulfield <ccaulfie@...hat.com>,
	David Teigland <teigland@...hat.com>,
	Mark Fasheh <mfasheh@...e.com>,
	Joel Becker <jlbec@...lplan.org>, linux-kernel@...r.kernel.org
Subject: Re: char: make misc_deregister a void function

On Thu, Jul 30 2015 at  6:59pm -0400,
Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:

> From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> 
> With well over 200+ users of this api, there are a mere 12 users that
> actually cheked the return value of this function.  And all of them
> really didn't do anything with that information as the system or module
> was shutting down no matter what.
> 
> So stop pretending like it matters, and just return void from
> misc_deregister().  If something goes wrong in the call, you will get a
> WARNING splat in the syslog so you know how to fix up your driver.
> Other than that, there's nothing that can go wrong.
> 
> Cc: Alasdair Kergon <agk@...hat.com>
> Cc: Mike Snitzer <snitzer@...hat.com>
> Cc: Neil Brown <neilb@...e.com>
> Cc: Alessandro Zummo <a.zummo@...ertech.it>
> Cc: Alexandre Belloni <alexandre.belloni@...e-electrons.com>
> Cc: Oleg Drokin <oleg.drokin@...el.com>
> Cc: Andreas Dilger <andreas.dilger@...el.com>
> Cc: "Michael S. Tsirkin" <mst@...hat.com>
> Cc: Wim Van Sebroeck <wim@...ana.be>
> Cc: Christine Caulfield <ccaulfie@...hat.com>
> Cc: David Teigland <teigland@...hat.com>
> Cc: Mark Fasheh <mfasheh@...e.com>
> Cc: Joel Becker <jlbec@...lplan.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> 
> ---
> 
> If the different subsystem maintainers want to give me an ack for this,
> I'd appreciate it.  I'd like to just take the single patch in through
> the char-misc tree in one piece.

For DM:
Acked-by: Mike Snitzer <snitzer@...hat.com>
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