All of lore.kernel.org
 help / color / mirror / Atom feed
From: Ingo Molnar <mingo@elte.hu>
To: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	Pavel Emelyanov <xemul@parallels.com>,
	Serge Hallyn <serge.hallyn@canonical.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	Kees Cook <keescook@chromium.org>, Tejun Heo <tj@kernel.org>,
	Andrew Vagin <avagin@openvz.org>,
	"Eric W. Biederman" <ebiederm@xmission.com>,
	Alexey Dobriyan <adobriyan@gmail.com>,
	Andi Kleen <andi@firstfloor.org>,
	KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Glauber Costa <glommer@parallels.com>,
	Matt Helsley <matthltc@us.ibm.com>,
	Pekka Enberg <penberg@kernel.org>,
	Eric Dumazet <eric.dumazet@gmail.com>,
	Vasiliy Kulikov <segoon@openwall.com>,
	Valdis.Kletnieks@vt.edu
Subject: Re: [patch cr 2/4] [RFC] syscalls, x86: Add __NR_kcmp syscall v7
Date: Fri, 3 Feb 2012 10:09:29 +0100	[thread overview]
Message-ID: <20120203090929.GA23996@elte.hu> (raw)
In-Reply-To: <20120203083530.GD1968@moon>


* Cyrill Gorcunov <gorcunov@openvz.org> wrote:

> > > +			get_random_bytes(&cookies[i][j],
> > > +					 sizeof(cookies[i][j]));
> > 
> > ugly line break.
> > 
> 
> Why? Looks pretty good to me. But sure I'll change it.

It's ugly because it serves no purpose other than pacifying 
checkpatch and makes the code *uglier*.

It's a disease. When checkpatch tells you "this line is too 
long" then consider it a code cleanliness warning!

		And code
	readability and cleanliness
		is not improved
	by random line-
		breaks, right?

'breaking the line' is the *wrong fix* in roughly 90% of the 
cases.

So instead of dumbly breaking the line you need to think about 
*WHY* the line got too long, not just mechanically work around 
the checkpatch warning!

Too long lines can have many reasons, it's usually one of 
several reasons:

     - too much nesting due to too large function.
       solution: break up the function
 or: - too verbose statements with not enough abbreviation
       solution: find a more compact way to write it

or if the code looks compact enough and is not over-nested then 
*leave the line alone*. By breaking it you have not improved - 
you have made it worse.

Thanks,

	Ingo

  reply	other threads:[~2012-02-03  9:10 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-30 14:09 [patch cr 0/4] [patch cr 0/@total@] Cyrill Gorcunov
2012-01-30 14:09 ` [patch cr 1/4] fs, proc: Introduce /proc/<pid>/task/<tid>/children entry v9 Cyrill Gorcunov
2012-01-30 14:09 ` [patch cr 2/4] [RFC] syscalls, x86: Add __NR_kcmp syscall v7 Cyrill Gorcunov
2012-01-30 19:58   ` Jonathan Corbet
2012-01-30 21:07     ` Cyrill Gorcunov
2012-01-30 21:11     ` H. Peter Anvin
2012-02-02 23:26   ` Andrew Morton
2012-02-03  2:27     ` H. Peter Anvin
2012-02-03  7:09       ` Cyrill Gorcunov
2012-02-03  7:46   ` Ingo Molnar
2012-02-03  8:35     ` Cyrill Gorcunov
2012-02-03  9:09       ` Ingo Molnar [this message]
2012-02-03  9:22         ` Andrew Morton
2012-02-03  9:28           ` Cyrill Gorcunov
2012-02-03 17:32             ` H. Peter Anvin
2012-02-03 17:35               ` H. Peter Anvin
2012-02-03 17:42                 ` Cyrill Gorcunov
2012-02-03  9:52           ` Ingo Molnar
2012-02-03 10:07             ` [PATCH] SubmittingPatches: Increase the line length limit from 80 to 100 colums Ingo Molnar
2012-02-03 10:17               ` Pekka Enberg
2012-02-03 10:23                 ` Cyrill Gorcunov
2012-02-03 10:40               ` Alexey Dobriyan
2012-02-03 16:13               ` Tejun Heo
2012-02-03 16:39                 ` hpanvin@gmail.com
2012-02-03 17:56               ` Andi Kleen
2012-02-03 20:57               ` Andrew Morton
2012-02-03 21:00                 ` H. Peter Anvin
2012-02-03 21:06                 ` H. Peter Anvin
2012-02-04 13:08                 ` Ingo Molnar
2012-02-03 21:27               ` Linus Torvalds
2012-02-03 23:20                 ` [PATCH] checkpatch: Warn on code with 6+ tab indentation Joe Perches
2012-02-04  1:27                   ` Linus Torvalds
2012-02-04  1:33                     ` Joe Perches
2012-02-04  3:09                       ` Linus Torvalds
2012-02-04  3:21                         ` Joe Perches
2012-02-04  3:35                           ` Linus Torvalds
2012-02-04  3:58                             ` Joe Perches
2012-02-04  1:37                     ` Andrew Morton
2012-02-04  2:40                   ` Eric W. Biederman
2012-02-04  2:46                     ` Joe Perches
2012-02-04  4:45                   ` Tony Luck
2012-02-04  4:53                     ` Joe Perches
2012-02-04 13:03                   ` [PATCH, v2] checkpatch: Warn on code with 6+ tab indentation, remove 80col warning Ingo Molnar
2012-02-04 16:22                     ` Joe Perches
2012-02-04 18:02                       ` Ingo Molnar
2012-02-04 18:48                         ` Joe Perches
2012-02-04 18:54                           ` Pekka Enberg
2012-02-04 19:27                             ` Joe Perches
2012-02-04 19:32                               ` Pekka Enberg
2012-02-05 11:38                               ` Ingo Molnar
2012-02-05 16:21                                 ` Joe Perches
2012-02-05 18:13                                   ` Ingo Molnar
2012-02-05 19:01                                     ` [PATCH] checkpatch: Add line-length options, set default to 100 Joe Perches
2012-02-06 12:36                                       ` Dan Carpenter
2012-02-04  1:24                 ` [PATCH] SubmittingPatches: Increase the line length limit from 80 to 100 colums Randy Dunlap
2012-02-09 21:55               ` Jan Engelhardt
2012-02-09 22:09                 ` Joe Perches
2012-02-09 22:30                 ` Mark Brown
2012-01-30 14:09 ` [patch cr 3/4] c/r: procfs: add arg_start/end, env_start/end and exit_code members to /proc/$pid/stat Cyrill Gorcunov
2012-02-02 23:26   ` Andrew Morton
2012-02-03  7:11     ` Cyrill Gorcunov
2012-01-30 14:09 ` [patch cr 4/4] c/r: prctl: Extend PR_SET_MM to set up more mm_struct entries Cyrill Gorcunov
2012-02-02 23:27   ` Andrew Morton
2012-02-03  7:18     ` Cyrill Gorcunov
2012-02-02 23:26 ` [patch cr 0/4] [patch cr 0/@total@] Andrew Morton

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20120203090929.GA23996@elte.hu \
    --to=mingo@elte.hu \
    --cc=Valdis.Kletnieks@vt.edu \
    --cc=adobriyan@gmail.com \
    --cc=akpm@linux-foundation.org \
    --cc=andi@firstfloor.org \
    --cc=avagin@openvz.org \
    --cc=ebiederm@xmission.com \
    --cc=eric.dumazet@gmail.com \
    --cc=glommer@parallels.com \
    --cc=gorcunov@openvz.org \
    --cc=hpa@zytor.com \
    --cc=kamezawa.hiroyu@jp.fujitsu.com \
    --cc=keescook@chromium.org \
    --cc=kosaki.motohiro@gmail.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=matthltc@us.ibm.com \
    --cc=penberg@kernel.org \
    --cc=segoon@openwall.com \
    --cc=serge.hallyn@canonical.com \
    --cc=tglx@linutronix.de \
    --cc=tj@kernel.org \
    --cc=xemul@parallels.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.