linux-kernel - Re: [PATCH 2/2] x86 platform driver: intelligent power sharing driver

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Message-ID: <20100511111854.658a5520@virtuousgeek.org>
Date:	Tue, 11 May 2010 11:18:54 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	unlisted-recipients:; (no To-header on input)
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, intel-gfx@...ts.freedesktop.org,
	Matthew Garrett <mjg59@...f.ucam.org>
Subject: Re: [PATCH 2/2] x86 platform driver: intelligent power sharing
 driver

On Tue, 11 May 2010 07:59:19 -0700
Jesse Barnes <jbarnes@...tuousgeek.org> wrote:

> On Mon, 10 May 2010 22:00:46 -0400
> Andrew Morton <akpm@...ux-foundation.org> wrote:
> > > +#define thm_readb(off) readb(ips->regmap + (off))
> > > +#define thm_readw(off) readw(ips->regmap + (off))
> > > +#define thm_readl(off) readl(ips->regmap + (off))
> > > +#define thm_readq(off) readq(ips->regmap + (off))
> > > +
> > > +#define thm_writeb(off, val) writeb((val), ips->regmap + (off))
> > > +#define thm_writew(off, val) writew((val), ips->regmap + (off))
> > > +#define thm_writel(off, val) writel((val), ips->regmap + (off))
> > 
> > ick.
> > 
> > static inline unsigned short thm_readw(struct ips_driver *ips, unsigned offset)
> > {
> > 	readw(ips->regmap + offset);
> > }
> > 
> > would be nicer.
> 
> Yes, it would.

No, I take that back, it just means more typing.  This idiom of
expecting a given variable to be declared for the IO routines to work
is pretty common in drivers, and saves a bunch of redundant "(ips,"
everywhere...

> > afacit these messages might come out at one-per-five-seconds max?
> > 
> > I bet the driver blows up and someone's logs get spammed ;)
> 
> Possibly. :)  I added these at the request of Pavel; I could make them
> just print one time though...

These should be dev_warn instead anyway.

Updated patch on its way.

-- 
Jesse Barnes, Intel Open Source Technology Center
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