linux-kernel - Re: [PATCH 1/3] drivers/staging/cx25821: Use kstrdup

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Message-ID: <1287424542.20968.121.camel@Joe-Laptop>
Date:	Mon, 18 Oct 2010 10:55:42 -0700
From:	Joe Perches <joe@...ches.com>
To:	Julia Lawall <julia@...u.dk>
Cc:	walter harms <wharms@....de>, devel@...verdev.osuosl.org,
	gregkh@...e.de, kernel-janitors@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] drivers/staging/cx25821: Use kstrdup

On Mon, 2010-10-18 at 19:44 +0200, Julia Lawall wrote:
> On Mon, 18 Oct 2010, Joe Perches wrote:
> 
> > Perhaps it's more readable code to recheck the
> > field name flag and introduce a temporary
> > char *fname so the slightly unusual reuse of
> > 	field = kstrdup(field, GFP)
> > becomes
> > 	field = kstrdup(fname, GFP)
> 
> Before I had a local variable filename.  I preferred that because I felt 
> uneasy about putting both statically and dynamically allocated memory in 
> the same field.  But it does mean adding a new local variable.

I think readability is better using a temporary.

> I'm not sure to understand "recheck the field name flag", though.

Sorry, poor wording.  I meant using this style:

	if (field && *field)
		foo
	else if (field)
		bar
	else
		baz

instead of:

	if (field) {
		if (*field)
			foo
		else
			bar
	} else
		baz


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