linux-kernel - Re: [PATCH resend] Make the dev_*() family of macros in device.hcomplete

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Date:	Thu, 1 Nov 2007 16:57:00 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Greg KH <gregkh@...e.de>
Cc:	Emilian.Medve@...escale.com, linux-kernel@...r.kernel.org,
	hjlipp@....de, tilman@...p.cc,
	gigaset307x-common@...ts.sourceforge.net, kkeil@...e.de,
	isdn4linux@...tserv.isdn4linux.de, mac@...ware.de,
	linux-omap-open-source@...ux.omap.com
Subject: Re: [PATCH resend] Make the dev_*() family of macros in
 device.hcomplete

On Tue, 30 Oct 2007 08:40:08 -0700
Greg KH <gregkh@...e.de> wrote:

> On Tue, Oct 30, 2007 at 05:11:24AM -0700, Medve Emilian-EMMEDVE1 wrote:
> > Hi Greg K-H,
> > 
> > 
> > > > +#define dev_info(dev, format, arg...)		\
> > > > +	dev_printk(KERN_INFO, dev, format, ## arg)
> > > > +
> > > >  #ifdef DEBUG
> > > >  #define dev_dbg(dev, format, arg...)		\
> > > > -	dev_printk(KERN_DEBUG , dev , format , ## arg)
> > > > +	dev_printk(KERN_DEBUG, dev, format, ## arg)
> > > 
> > > Those extra spaces are there for a good reason, older versions of gcc
> > > are broken without it.  So please, put them all back...
> > 
> > You mean I should add spaces before commas only where they were
> > initially or to all new code and/or macros?
> 
> Put it back where it was, and do the same for all other macros.
> 
> > I've observed other kernel code and more often there are no spaces
> > before commas. I'm asking because the CodingStyle document is not very
> > explicit about this rule.
> 
> This is a gcc rule, for variable length macros, not a CodingStyle
> guideline.  It just will not work without it :)
> 

The space-before-a-comma requirement was for gcc-2.95, iirc.

It got to the stage where I was the only person testing with gcc-2.95 so I
spent inordinate amounts of time adding spaces before people's newly-added
commas.  Fortunately we abamdoned that gcc version so the space-before-a-comma
requirement no longer exists.

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