linux-kernel - RE: [PATCHv1 008/211] unicore32: new file arch/unicore32/boot/compressed/misc.c

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Date:	Mon, 13 Dec 2010 14:50:13 +0800
From:	"Guan Xuetao" <guanxuetao@...c.pku.edu.cn>
To:	"'Arnd Bergmann'" <arnd@...db.de>
Cc:	"'Miguel Ojeda'" <miguel.ojeda.sandonis@...il.com>,
	<linux-arch@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: RE: [PATCHv1 008/211] unicore32: new file arch/unicore32/boot/compressed/misc.c


> > > > +/* Diagnostic functions */
> > > > +#ifdef DEBUG
> > > > +#  define Assert(cond, msg)    { if (!(cond)) error(msg); }
> > > > +#  define Trace(x)             fprintf x
> > > > +#  define Tracev(x)            { if (verbose)                  fprintf x; }
> > > > +#  define Tracevv(x)           { if (verbose > 1)              fprintf x; }
> > > > +#  define Tracec(c, x)         { if (verbose && (c))           fprintf x; }
> > > > +#  define Tracecv(c, x)                { if ((verbose > 1) && (c))
> > > > fprintf x; }
> > >
> > > Maybe uppercase? Maybe do { ... } while(0)?
> >
> > Uppercase  for what? Tracexx to tracexx?
> 
> We normally don't have mixed-case identifiers, normally it would be
> trace() for functions vs. TRACE() for macros, though we also have a
> lot of lower-case macros as well.
> 
> For the debugging macros, I would generally recommend not having
> any, but simply using the standard pr_debug and dev_dbg macros
> that everyone knows and understands.
> 
> If you really need to do macros, make them so that they work like
> functions, e.g.
> 
> #define foo_tracev(...) do { if (verbose) fprintf(__va_args__); } while (0)

When reviewing misc.c, I find that Tracevv and Tracecv are not used in lib/decompress_inflate.c
So these macros could be removed directly.
The same for other architectures, I think.

Guan Xuetao



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