linux-kernel - Re: [PATCH RFC] Remove useless return variables

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Message-ID: <CA+MoWDqQ552d+DGJBc0i_=AQV1ueTGQX=ie0wSM+pqqtUOr3TA@mail.gmail.com>
Date:	Sun, 18 May 2014 14:14:12 +0200
From:	Peter Senna Tschudin <peter.senna@...il.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Dan Carpenter <dan.carpenter@...cle.com>,
	kernel-janitors@...r.kernel.org,
	"kernelnewbies@...nelnewbies.org" <kernelnewbies@...nelnewbies.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	trivial@...r.kernel.org
Subject: Re: [PATCH RFC] Remove useless return variables

Added CC: trivial@...r.kernel.org

On Sun, May 18, 2014 at 7:04 AM, Andi Kleen <andi@...stfloor.org> wrote:
> Peter Senna Tschudin <peter.senna@...il.com> writes:
>
>> This patch remove variables that are initialized with a constant,
>> are never updated, and are only used as parameter of return.
>> Return the constant instead of using a variable.
>
> This ret variable pattern is pretty standard in Linux, as it makes it
> easier to add new code that may trigger new errors
> (using the usual "goto forest" error handling pattern)
The average age in days of the return statements my patch changes is
1384, which is more than 3 years, so, in average, the plan of adding
new code was lost...
See: http://pastebin.com/2k13sHU2

>
> I don't see any benefit in whole-sale removing it. The compiler
> doesn't care about it and will generate the same code in any
> case.
My goal is to make the code cleaner and easier to understand.

Should I split this into a lot of patches?

>
> -Andi
>
> --
> ak@...ux.intel.com -- Speaking for myself only



-- 
Peter
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