Date: Mon, 10 Mar 2008 17:35:44 -0400
From: Andres Salomon <dilinger@queued.net>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: adaplas@gmail.com, linux-kernel@vger.kernel.org,
       linux-fbdev-devel@lists.sourceforge.net, info-linux@geode.amd.com,
       jordan.crouse@amd.com
Subject: Re: [PATCH 1/6] gxfb: create DC/VP/FP-specific handlers rather than
 using readl/writel
Message-ID: <20080310173544.171183fc@ephemeral>
In-Reply-To: <20080310142405.e8b92156.akpm@linux-foundation.org>
References: <20080308204826.0d399caf@ephemeral>
	<20080310142405.e8b92156.akpm@linux-foundation.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1420
Lines: 44

On Mon, 10 Mar 2008 14:24:05 -0700
Andrew Morton <akpm@linux-foundation.org> wrote:

> On Sat, 8 Mar 2008 20:48:26 -0500
> Andres Salomon <dilinger@queued.net> wrote:
> 
> > +#define read_dc(reg)		readl(par->dc_regs + (reg))
> > +#define write_dc(reg, val)	writel((val), par->dc_regs + (reg))
> > +
> > +#define read_vp(reg)		readl(par->vid_regs + (reg))
> > +#define write_vp(reg, val)	writel((uint32_t) (val), \
> > +					par->vid_regs + (reg))
> > +
> > +#define read_fp(reg)		readl(par->vid_regs + (reg))
> > +#define write_fp(reg, val)	writel((uint32_t) (val), \
> > +					par->vid_regs + (reg))
> > +
> 
> Not very nice, sorry.  They're macros, and macros rather suck.  And they
> implicitly rely upon the caller having some variable called "par" in scope.
> 
> It would be much nicer to do
> 
> /*
>  * documentation goes here
>  */
> static inline u32 read_dc(struct geodefb_par *par, int reg)
> {
> 	return readl(par->dc_regs, reg);
> }
> 
> no?

I can change it if you'd like (although.. sigh.)

However, it's a lot of extra passing around of the 'par' without any
good reason.  Normal I prefer inline functions to macros as well, but
I don't see the point here.
 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/