linux-kernel - Re: [PATCH 09/50] staging: omap-thermal: make a omap_bandgap

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Date:	Sat, 16 Mar 2013 08:39:11 -0400
From:	Eduardo Valentin <eduardo.valentin@...com>
To:	Dan Carpenter <dan.carpenter@...cle.com>
CC:	<gregkh@...uxfoundation.org>, <devel@...verdev.osuosl.org>,
	<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-pm@...r.kernel.org>
Subject: Re: [PATCH 09/50] staging: omap-thermal: make a omap_bandgap_power
 with only one exit point

Hey Dan,

On 15-03-2013 17:22, Dan Carpenter wrote:
> On Fri, Mar 15, 2013 at 08:59:57AM -0400, Eduardo Valentin wrote:
>> Change the way the omap_bandgap_power is written so that it has only
>> one exit entry (Documentation/CodingStyle).
>>
>
> It's only if there is an unlock or something that you should do
> this.  Otherwise the pointless bunny hop is misleading and annoying.

Well, if that is the case the Chapter 7 needs to be rewritten, don't you 
think? The way it is stated, it is clear that it is a design decision to 
use it for keeping only one exit point (quoting):

"Albeit deprecated by some people, the equivalent of the goto statement is
used frequently by compilers in form of the unconditional jump instruction.

The goto statement comes in handy when a function exits from multiple
locations and some common work such as cleanup has to be done.

The rationale is:

- unconditional statements are easier to understand and follow
- nesting is reduced
- errors by not updating individual exit points when making
     modifications are prevented
- saves the compiler work to optimize redundant code away ;)"

I believe this patch falls into at least three of the above rationale.

>
> regards,
> dan carpenter
>
>
>

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