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

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Message-ID: <20091218161038.GA19142@suse.de>
Date:	Fri, 18 Dec 2009 08:10:38 -0800
From:	Greg KH <gregkh@...e.de>
To:	Phil Carmody <ext-phil.2.carmody@...ia.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC 0/6] Driver core: Encourage use of const attributes

On Fri, Dec 18, 2009 at 10:52:21AM +0200, Phil Carmody wrote:
> 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.

Great.

> > > 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.

That would be nice to try, let me know what you find.

> > > 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.

Got them, I'll go queue them up.

thanks again,

greg k-h
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