linux-kernel - Re: [RFC 0/6] Driver core: Encourage use of const attributes

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Message-ID: <20091218085221.GD29232@pcarmody-desktop>
Date:	Fri, 18 Dec 2009 10:52:21 +0200
From:	Phil Carmody <ext-phil.2.carmody@...ia.com>
To:	ext Greg KH <gregkh@...e.de>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC 0/6] Driver core: Encourage use of const attributes

On 18/12/09 00:16 +0100, ext Greg KH wrote:
> On Thu, Dec 17, 2009 at 08:12:10PM +0200, Phil Carmody wrote:
[...]> > So here I offer a small patchset which I hope will permit and 
> > encourage device and other attributes to be made const, and put 
> > in read-only sections.
> > 
> > 1-3 address the three attribute types which seemed to be trivially 
> > const-able, and are the important part of the set.
> 
> I like these, very nice.

Thanks, I can possibly sniff a little bit deeper, and see if there are
any other obvious throwing-away-of-consts nearby.

> > 4 adds a new macro to encourage the use of Const ATTRibutes,
> > and may need a better name. (I wanted to avoid RO, for example.)
> 
> Hm, is this really needed?  How badly do things break if you change the
> current attribute macros to use 'const'?  What subsystems are not using
> const?

That was the first thing that went through my mind, but I didn't want
to be too brave. He who dares wins though, and I can certainly give
that a try. allmodconfig is my friend.

> > 5 and 6 are merely two quick examples of how easy it is to adopt 
> > the new const convention. In reality, these structures have been
> > constant and treated as constant by the driver core all along, it's
> > just that one word was missing from a few important places.
> > 
> > I would hope to submit a patchset with 1-3 and a possibly modified 
> > 4. The migrations themselves will belong in different trees.
> 
> I'll be glad to take 1-3 now, and queue it up for .34.

They cleave cleanly at that point, so I'll resend with a [PATCH] prefix.

Many thanks, and seasons greetings,

Phil
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