linux-kernel - Re: [PATCH 5/5] x86, head_32: Remove an old gcc2 fix

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Message-ID: <af2ed3e1-3ac4-421c-b1a8-bfa243327ffb@email.android.com>
Date:	Sat, 09 Feb 2013 12:52:01 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Borislav Petkov <bp@...en8.de>
CC:	X86 ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
	Borislav Petkov <bp@...e.de>
Subject: Re: [PATCH 5/5] x86, head_32: Remove an old gcc2 fix

However... DF should have been cleared long before this...

Borislav Petkov <bp@...en8.de> wrote:

>From: Borislav Petkov <bp@...e.de>
>
>gcc2 wants direction flag cleared but we don't support gcc2 anymore. So
>drop it. Original patch adding this was:
>
>commit 57d40092c375d2b6d34f814f5fb306967e22c4f5
>Author: linus1 <torvalds@...uxfoundation.org>
>Date:   Mon Nov 9 12:00:00 1992 -0600
>
>    [PATCH] Linux-0.98.4 (November 9, 1992)
>...
>
>Signed-off-by: Borislav Petkov <bp@...e.de>
>---
> arch/x86/kernel/head_32.S | 1 -
> 1 file changed, 1 deletion(-)
>
>diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
>index 75e96d7e4e5f..fc56613224c3 100644
>--- a/arch/x86/kernel/head_32.S
>+++ b/arch/x86/kernel/head_32.S
>@@ -463,7 +463,6 @@ is486:
> 	xorl %eax,%eax			# Clear LDT
> 	lldt %ax
> 
>-	cld			# gcc2 wants the direction flag cleared at all times
> 	pushl $0		# fake return address for unwinder
> 	jmp *(initial_code)
> 

-- 
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