linux-kernel - Re: [PATCH 002 of 9] knfsd: knfsd: Remove an unused variable from e

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Date:	Tue, 25 Jul 2006 14:20:14 +1000
From:	Neil Brown <neilb@...e.de>
To:	Josef Sipek <jsipek@....cs.sunysb.edu>
Cc:	Andrew Morton <akpm@...l.org>, nfs@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 002 of 9] knfsd: knfsd: Remove an unused variable from e_show().

On Tuesday July 25, jsipek@....cs.sunysb.edu wrote:
> On Tue, Jul 25, 2006 at 11:54:32AM +1000, NeilBrown wrote:
> ...
> > diff .prev/fs/nfsd/export.c ./fs/nfsd/export.c
> > --- .prev/fs/nfsd/export.c	2006-07-24 14:33:06.000000000 +1000
> > +++ ./fs/nfsd/export.c	2006-07-24 14:33:26.000000000 +1000
> > @@ -1178,7 +1178,6 @@ static int e_show(struct seq_file *m, vo
> ...
> >  	if (p == (void *)1) {
> 
> I'm not an NFS expert, but the above makes me want to puke. Isn't there a
> cleaner way of doing whatever needs to be done without:
> 
> 1) hard-coding a constant
> 2) comparing a variable to an arbitrary pointer
> 

Probably.  We just need a pointer value that is definitely not a
pointer to a valid cache_head object, and is not NULL.
(void*)1 seems a reasonable choice, but maybe #defineing something
would help.

Patches welcome.

NeilBrown
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