linux-kernel - Re: Add a private_data pointer to struct device

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Date:	Sat, 17 Nov 2007 08:02:38 -0600
From:	Timur Tabi <timur@...escale.com>
To:	Mikael Pettersson <mikpe@...uu.se>
CC:	gregkh@...e.de, linux-kernel@...r.kernel.org
Subject: Re: Add a private_data pointer to struct device_attribute

Mikael Pettersson wrote:

> A common trick is to embed a generic struct inside a specific one
> containing add-on data fields, and then to map from the generic
> one to the specific one using container_of() in your ops (function
> pointers). This is both faster and less wasteful of memory than
> adding void *private all over the place.
> 
> Any reason that won't work here?

Yes, that will work.  Sorry, I should have thought of that myself, since I've 
used that trick a number of times before.

-- 
Timur Tabi
Linux Kernel Developer @ Freescale
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