linux-kernel - Re: [PATCH] kobject: introduce kobj

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Message-ID: <20130911172813.GL13318@ZenIV.linux.org.uk>
Date:	Wed, 11 Sep 2013 18:28:13 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Jeff Mahoney <jeffm@...e.com>
Cc:	Greg KH <gregkh@...ux.com>,
	Linux Kernel Maling List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kobject: introduce kobj_completion

On Wed, Sep 11, 2013 at 01:00:30PM -0400, Jeff Mahoney wrote:
> A common way to handle kobject lifetimes in embedded in objects with
> different lifetime rules is to pair the kobject with a struct completion.
> 
> This introduces a kobj_completion structure that can be used in place
> of the pairing, along with several convenience functions for
> initialization, release, and put-and-wait.

That's very easy to misuse, leading to deadlocks...
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