Date: Sat, 22 Sep 2007 04:48:28 -0400 (EDT)
From: "Robert P. J. Day" <rpjday@mindspring.com>
To: Cyrill Gorcunov <gorcunov@gmail.com>
cc: LKML <linux-kernel@vger.kernel.org>,
       Andrew Morton <akpm@linux-foundation.org>, Ingo Molnar <mingo@elte.hu>,
       Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: memset as memzero
In-Reply-To: <20070922083355.GA7226@cvg>
Message-ID: <Pine.LNX.4.64.0709220441090.21302@localhost.localdomain>
References: <20070922083355.GA7226@cvg>
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On Sat, 22 Sep 2007, Cyrill Gorcunov wrote:

> Hi list,
>
> could anyone tell me why there is no official memzero function (or
> macros) in the kernel. As I see a lot of kernel parts calls for it
> (defying own macros as alias to memset). Maybe there is a special
> reason not to do so? Actually my suggestion is to define _one_
> general macros for this.

i brought up this issue on the KJ list once upon a time:

https://lists.linux-foundation.org/pipermail/kernel-janitors/2007-February/017847.html

and there didn't seem to be much enthusiasm for it.

  however, i am still curious why there isn't more use of the
already-defined "clear_page" macro.  most architectures appear to
define it:

$ grep -r "define.*clear_page" include

but there are still numerous explicit calls to memset() to zero a
chunk of memory that is exactly PAGE_SIZE in size.  just an
observation.

rday
-- 
========================================================================
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry
Waterloo, Ontario, CANADA

http://crashcourse.ca
========================================================================
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