linux-kernel - Re: [PATCH 1/5] Clocklib: add generic framework for managing clocks.

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Message-ID: <20080415101113.GD7506@doriath.ww600.siemens.net>
Date:	Tue, 15 Apr 2008 14:11:13 +0400
From:	Dmitry Baryshkov <dbaryshkov@...il.com>
To:	Pavel Machek <pavel@....cz>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Haavard Skinnemoen <haavard.skinnemoen@...el.com>,
	Russell King <rmk+lkml@....linux.org.uk>,
	Paul Mundt <lethal@...ux-sh.org>,
	pHilipp Zabel <philipp.zabel@...il.com>, tony@...mide.com,
	paul@...an.com, David Brownell <david-b@...bell.net>
Subject: Re: [PATCH 1/5] Clocklib: add generic framework for managing
	clocks.

On Tue, Apr 15, 2008 at 11:53:32AM +0200, Pavel Machek wrote:
> > On Tue, 15 Apr 2008 13:34:51 +0400 Dmitry Baryshkov <dbaryshkov@...il.com> wrote:
> > 
> > > On Mon, Apr 14, 2008 at 11:13:30PM -0700, Andrew Morton wrote:
> > > > On Sun, 13 Apr 2008 18:43:12 +0400 Dmitry Baryshkov <dbaryshkov@...il.com> wrote:
> > > > 
> > > > > +#define FUNC_TO_CLK(func)	&(&(struct clk_function) func)->clk
> > > > 
> > > > scratched my head for a while, was unable to work out what this does.
> > > > It is unused, so I think it can be zapped?
> > > 
> > > It take clk_function and returns pointer to the contained struct clk.
> > 
> > Then why does it cast a clk_function to a clk_function?
> > 
> > The innermost `&' hurts my brain.
> 
> Hmm, is that obfuscated way of writing
> 
> &(func.clk)

Oops... Yes. Then it really can be dropped.

> 
> ?
> 									Pavel
> 
> -- 
> (english) http://www.livejournal.com/~pavelmachek
> (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

-- 
With best wishes
Dmitry

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