linux-kernel - Re: [PATCH 5/4] ipc,shm: minor cleanups

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Date:	Wed, 23 Apr 2014 07:28:52 +0200
From:	"Michael Kerrisk (man-pages)" <mtk.manpages@...il.com>
To:	Davidlohr Bueso <davidlohr@...com>
CC:	mtk.manpages@...il.com, Manfred Spraul <manfred@...orfullife.com>,
	Davidlohr Bueso <davidlohr.bueso@...com>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	gthelen@...gle.com, aswin@...com, linux-mm@...ck.org
Subject: Re: [PATCH 5/4] ipc,shm: minor cleanups

On 04/23/2014 07:25 AM, Davidlohr Bueso wrote:
> On Wed, 2014-04-23 at 07:07 +0200, Michael Kerrisk (man-pages) wrote:
>> On 04/23/2014 04:53 AM, Davidlohr Bueso wrote:
>>> -  Breakup long function names/args.
>>> -  Cleaup variable declaration.
>>> -  s/current->mm/mm
>>>
>>> Signed-off-by: Davidlohr Bueso <davidlohr@...com>
>>> ---
>>>  ipc/shm.c | 40 +++++++++++++++++-----------------------
>>>  1 file changed, 17 insertions(+), 23 deletions(-)
>>>
>>> diff --git a/ipc/shm.c b/ipc/shm.c
>>> index f000696..584d02e 100644
>>> --- a/ipc/shm.c
>>> +++ b/ipc/shm.c
>>> @@ -480,15 +480,13 @@ static const struct vm_operations_struct shm_vm_ops = {
>>>  static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
>>>  {
>>>  	key_t key = params->key;
>>> -	int shmflg = params->flg;
>>> +	int id, error, shmflg = params->flg;
>>
>> It's largely a matter of taste (and I may be in a minority), and I know
>> there's certainly precedent in the kernel code, but I don't much like the 
>> style of mixing variable declarations that have initializers, with other
>> unrelated declarations (e.g., variables without initializers). What is 
>> the gain? One less line of text? That's (IMO) more than offset by the 
>> small loss of readability.
> 
> Yes, it's taste. And yes, your in the minority, at least in many core
> kernel components and ipc.

I figured so. Just giving the minority a small voice ;-).


-- 
Michael Kerrisk
Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/
Linux/UNIX System Programming Training: http://man7.org/training/
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