linux-kernel - Re: [PATCH 3/3] cifs: Enable Kconfig control of CIFS

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Date:	Fri, 30 Nov 2012 06:57:40 -0800
From:	Joe Perches <joe@...ches.com>
To:	Jeff Layton <jlayton@...hat.com>
Cc:	Steve French <sfrench@...ba.org>, linux-cifs@...r.kernel.org,
	samba-technical@...ts.samba.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] cifs: Enable Kconfig control of CIFS_DEBUG

On Fri, 2012-11-30 at 06:56 -0500, Jeff Layton wrote:
> On Thu, 29 Nov 2012 11:37:20 -0800
> Joe Perches <joe@...ches.com> wrote:
> 
> > Rather than havign a permanently enabled #define, allow
> > control over it.
> > 
> > This can reduce the size of the module by ~100KB which
> > could be useful for embedded systems.
[]
> > diff --git a/fs/cifs/cifs_debug.h b/fs/cifs/cifs_debug.h
> > index 4d12fe4..6867a7f 100644
> > --- a/fs/cifs/cifs_debug.h
> > +++ b/fs/cifs/cifs_debug.h
> > @@ -18,7 +18,10 @@
> >   *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> >   *
> >  */
> > -#define CIFS_DEBUG		/* BB temporary */
> > +
> > +#ifdef CONFIG_CIFS_DEBUG
> > +#define CIFS_DEBUG
> > +#endif
> >  
> >  #ifndef _H_CIFS_DEBUG
> >  #define _H_CIFS_DEBUG
> 
> Looks fine, but I'd probably prefer to just get rid of CIFS_DEBUG
> altogether here and replace it with CONFIG_CIFS_DEBUG.

I wasn't sure if there was other code anywhere else that depends
on CIFS_DEBUG.  There isn't any in the kernel source tree.  If not,
then you are right, it should be just CONFIG_CIFS_DEBUG.

> While you're at it, /proc/fs/cifs/cifsFYI should probably not be
> present when CONFIG_CIFS_DEBUG isn't set. Perhaps we should also
> disable traceSMB and its related functions too in that case?

That could be considered a kernel api change.
If people agree to delete it, I'd be OK with it.

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