linux-kernel - Re: [PATCH 03/41] VFS: Make lookup

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Message-ID: <20091210212434.GC10388@shell>
Date:	Thu, 10 Dec 2009 16:24:35 -0500
From:	Valerie Aurora <vaurora@...hat.com>
To:	Erez Zadok <ezk@...sunysb.edu>
Cc:	Jan Blunck <jblunck@...e.de>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Christoph Hellwig <hch@...radead.org>,
	Andy Whitcroft <apw@...onical.com>,
	Scott James Remnant <scott@...onical.com>,
	Sandu Popa Marius <sandupopamarius@...il.com>,
	Jan Rekorajski <baggins@...h.mimuw.edu.pl>,
	"J. R. Okajima" <hooanon05@...oo.co.jp>,
	Arnd Bergmann <arnd@...db.de>,
	Vladimir Dronnikov <dronnikov@...il.com>,
	Felix Fietkau <nbd@...nwrt.org>, linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/41] VFS: Make lookup_hash() return a struct path

On Mon, Nov 30, 2009 at 01:04:13AM -0500, Erez Zadok wrote:
> In message <1256152779-10054-4-git-send-email-vaurora@...hat.com>, Valerie Aurora writes:
> 
> > @@ -1937,7 +1942,8 @@ EXPORT_SYMBOL(filp_open);
> >   */
> >  struct dentry *lookup_create(struct nameidata *nd, int is_dir)
> >  {
> > -	struct dentry *dentry = ERR_PTR(-EEXIST);
> > +	struct path path = { .dentry = ERR_PTR(-EEXIST) } ;
> 
> I assume the compiler will initialize path.mnt to NULL.  Is NULL what you
> want?  Even if the compiler guarantees it, I think you should either
> explicitly init .mnt to NULL or leave a comment explaining what's going on
> -- so no future code reader will think that this was omitted; a comment can
> clarify your intentions more explicitly.

That is an unpleasant thing to look at.  I rewrote the exit paths so
that this initialization was unnecessary.

Thanks,

-VAL
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