linux-kernel - Re: staging: lustre: Delete unnecessary goto statements in six functions

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Date:	Tue, 15 Dec 2015 10:22:07 -0800
From:	Joe Perches <joe@...ches.com>
To:	SF Markus Elfring <elfring@...rs.sourceforge.net>,
	Dan Carpenter <dan.carpenter@...cle.com>
Cc:	Andreas Dilger <andreas.dilger@...el.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Oleg Drokin <oleg.drokin@...el.com>,
	lustre-devel@...ts.lustre.org, devel@...verdev.osuosl.org,
	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: staging: lustre: Delete unnecessary goto statements in six
 functions

On Tue, 2015-12-15 at 19:02 +0100, SF Markus Elfring wrote:
> > This is the original code:
> Really …?
> > 	result = baz();
> > 	if (result)
> > 		goto label;
> > 
> > label:
> > 	go on...
> 
> I do not see such a source code structure
> at the six places I propose to clean-up.
> 
> 
> > I don't find the test->goto label; label: use offensive,
> > but if he does, I think keeping a blank line in place of
> > the test->goto might be better.
> 
> I find this an interesting view on source code layout.
> Are there any more opinions around such implementation details?

Or to put it another way, use a blank line before the
first or only label in an error/out block.

I don't find it different then commonly written blocks like:

void foo(void)
{
	...;

	wind1();

	val = func1(...);
	if (val) {
		printk(...);
		goto err_type;
	}

	wind2();

	val = func2(...);
	if (val) {
		printk(...);
		goto err_type2;
	}

	...

	return 0;

err_type2:
	unwind2();
err_type:
	unwind1();
	return -ERR;
}

Yes, you can elide all the blank lines, but using them can
help readability.
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