linux-kernel - Re: [PATCH] apparent typo in ixgb.h, "_DEBUG_DRIVER

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Message-Id: <1160474506.3000.280.camel@laptopd505.fenrus.org>
Date:	Tue, 10 Oct 2006 12:01:46 +0200
From:	Arjan van de Ven <arjan@...radead.org>
To:	"Robert P. J. Day" <rpjday@...dspring.com>
Cc:	Alexey Dobriyan <adobriyan@...il.com>,
	linux-kernel@...r.kernel.org, trivial@...nel.org
Subject: Re: [PATCH] apparent typo in ixgb.h, "_DEBUG_DRIVER_" looks wrong

On Tue, 2006-10-10 at 05:28 -0400, Robert P. J. Day wrote:
> On Tue, 10 Oct 2006, Alexey Dobriyan wrote:
> 
> > On Tue, Oct 10, 2006 at 02:27:34AM -0400, Robert P. J. Day wrote:
> > > I'm *guessing* that "_DEBUG_DRIVER_" should really be
> > > "DEBUG_DRIVER" here, since there is no other occurrence of the
> > > former anywhere in the source tree.
> >
> > Since it's debugging guard, underscored or not... doesn't matter.
> > Convert to pr_debug or dev_dbg of you want to deal with it.
> >
> > > --- a/drivers/net/ixgb/ixgb.h
> > > +++ b/drivers/net/ixgb/ixgb.h
> > > @@ -77,7 +77,7 @@ #include "ixgb_hw.h"
> > >  #include "ixgb_ee.h"
> > >  #include "ixgb_ids.h"
> > >
> > > -#ifdef _DEBUG_DRIVER_
> > > +#ifdef DEBUG_DRIVER
> > >  #define IXGB_DBG(args...) printk(KERN_DEBUG "ixgb: " args)
> > >  #else
> > >  #define IXGB_DBG(args...)
> 
> but what you're suggesting is not equivalent.  i submitted that patch
> to fix what *seems* to be an obvious, innocuous typo, to bring that
> one header file into sync with the rest of the source tree, nothing
> more.
> 
> if all debugging should now use either of pr_debug() or dev_dbg(),
> that's fine but i notice that both of those macros will be defined
> only if "DEBUG" is defined, not "DEBUG_DRIVER".  so making the change
> you suggest would *not* be a trivial change.
> 
> what's the current standard for debugging directives in the kernel?

to use pr_debug or dev_dbg.
Yes it'll mean a slight change for this driver, but just do it. 


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