From: "Hua Zhong" <hzhong@gmail.com>
To: "'Paul Mackerras'" <paulus@samba.org>,
"'Pekka Enberg'" <penberg@cs.helsinki.fi>
Cc: "'Andrew Morton'" <akpm@osdl.org>,
"'James Morris'" <jmorris@namei.org>, <dwalker@mvista.com>,
<linux-kernel@vger.kernel.org>
Subject: RE: kfree(NULL)
Date: Sat, 22 Apr 2006 11:57:23 -0700 [thread overview]
Message-ID: <001201c6663e$983f7960$0200a8c0@nuitysystems.com> (raw)
In-Reply-To: <17481.60890.127240.334557@cargo.ozlabs.ibm.com>
> There is a judgement to be made at each call site of kfree
> (and similar functions) about whether the argument is rarely
> NULL, or could often be NULL. If the janitors have been
> making this judgement, I apologise, but I haven't seen them
> doing that.
>
> Paul.
Even if the caller passes NULL most of the time, the check should be removed.
It's just crazy talk to say "you should not check NULL before calling kfree, as long as you make sure it's not NULL most of the
time".
Hua
next prev parent reply other threads:[~2006-04-22 18:57 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-21 7:03 kfree(NULL) Daniel Walker
2006-04-21 7:22 ` kfree(NULL) James Morris
2006-04-21 8:54 ` kfree(NULL) Andrew Morton
2006-04-21 13:56 ` kfree(NULL) Vernon Mauery
2006-04-21 14:07 ` kfree(NULL) Dmitry Fedorov
2006-04-21 15:07 ` kfree(NULL) Jan Engelhardt
2006-04-21 19:22 ` kfree(NULL) Adrian Bunk
2006-04-21 20:30 ` kfree(NULL) Vernon Mauery
2006-04-21 20:54 ` kfree(NULL) Steven Rostedt
2006-04-21 21:38 ` kfree(NULL) Adrian Bunk
2006-04-22 11:56 ` kfree(NULL) Jörn Engel
2006-04-21 23:55 ` kfree(NULL) Paul Mackerras
2006-04-22 7:43 ` kfree(NULL) Pekka Enberg
2006-04-22 8:48 ` kfree(NULL) Paul Mackerras
2006-04-22 15:02 ` kfree(NULL) Pekka Enberg
2006-04-22 18:57 ` Hua Zhong [this message]
2006-04-22 19:05 ` kfree(NULL) Nick Piggin
2006-04-22 19:22 ` kfree(NULL) Hua Zhong
2006-04-22 19:25 ` kfree(NULL) Nick Piggin
2006-04-22 20:18 ` kfree(NULL) Jan Engelhardt
2006-04-23 16:50 ` kfree(NULL) Steven Rostedt
2006-04-22 11:34 ` kfree(NULL) Jesper Juhl
2006-04-21 14:06 ` kfree(NULL) Daniel Walker
[not found] <63XWg-1IL-5@gated-at.bofh.it>
[not found] ` <63YfP-26I-11@gated-at.bofh.it>
[not found] ` <63ZEY-45n-27@gated-at.bofh.it>
2006-04-21 15:25 ` kfree(NULL) Tilman Schmidt
2006-04-21 16:03 ` kfree(NULL) Daniel Walker
2006-04-21 17:48 ` kfree(NULL) Jörn Engel
2006-04-21 18:00 ` kfree(NULL) Steven Rostedt
2006-04-21 18:42 ` kfree(NULL) Daniel Walker
2006-04-21 18:56 ` kfree(NULL) Steven Rostedt
2006-04-21 19:26 ` kfree(NULL) Andrew Morton
-- strict thread matches above, loose matches on Subject: below --
2006-04-21 21:02 kfree(NULL) Hua Zhong
2006-04-21 21:11 ` kfree(NULL) Daniel Walker
2006-04-21 21:36 ` kfree(NULL) Michael Buesch
2006-04-21 21:42 ` kfree(NULL) Andrew Morton
2006-04-21 21:48 ` kfree(NULL) Andrew Morton
2006-04-21 22:53 ` kfree(NULL) Hua Zhong
2006-04-21 22:58 ` kfree(NULL) Daniel Walker
2006-04-21 23:03 ` kfree(NULL) Hua Zhong
2006-04-21 23:25 ` kfree(NULL) Andrew Morton
2006-04-21 23:27 ` kfree(NULL) Andrew Morton
2006-04-22 11:18 ` kfree(NULL) Jan Engelhardt
2006-04-22 12:05 kfree(NULL) linux
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