Re: [RFC] Changes to the driver model class code.

From: Dominik Brodowski
Date: Tue Mar 15 2005 - 15:25:17 EST

On Tue, Mar 15, 2005 at 11:34:15AM -0800, Greg KH wrote:
> > And what about device_driver and device structure? Are they going to
> > be changed over to be separately allocated linked objects?
> The driver stuff probably will be, and the device stuff possibly.
> However, they are used by a very small ammount of core code (the bus
> drivers), so changing that interface is not that important at this time.

So this means every device will have yet another reference count, and you
need to be aware of _each_ lifetime to write correct code. And the
_reference counting_ is the hard thing to get right, so we should make
_that_ easier. The existing class API was a step towards this direction, and
with the changes you're suggesting here we'd do two jumps backwards.

> > If not then its enouther reason to keep original class interface -
> > uniformity of driver model interface.
> Ease-of-use trumps uniformity

Ease-of-use, maybe. However, it also means
ease-of-getting-reference-counting-wrong. And reference counting trumps it
all :)

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