Re: [PATCH] Kill _

linux-mips

Re: [PATCH] Kill __bzero()

To:	fbuihuu@gmail.com
Subject:	Re: [PATCH] Kill __bzero()
From:	Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date:	Mon, 05 Nov 2007 00:42:08 +0900 (JST)
Cc:	ralf@linux-mips.org, linux-mips@linux-mips.org
In-reply-to:	<472D8058.5080209@gmail.com>
Original-recipient:	rfc822;linux-mips@linux-mips.org
References:	<472D8058.5080209@gmail.com>
Sender:	linux-mips-bounce@linux-mips.org

On Sun, 04 Nov 2007 09:18:32 +0100, Franck Bui-Huu <fbuihuu@gmail.com> wrote:
>   2/ For the caller, it makes no difference to call memset instead
>   since it has to setup the second parameter of __bzero to 0.

__bzero() does not clobber v0 but memset() does.  I don't know if gcc
does some magical thing to protect v0, but it would be safer to add v0
explicitly to clobber-list of __clear_user().

---
Atsushi Nemoto

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