linux-kernel - Re: [PATCH] i386 kernel instant reboot with older binutils fix

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Message-ID: <20070103141807.GA8236@in.ibm.com>
Date:	Wed, 3 Jan 2007 19:48:07 +0530
From:	Vivek Goyal <vgoyal@...ibm.com>
To:	Adrian Bunk <bunk@...sta.de>
Cc:	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...l.org>, Andi Kleen <ak@....de>,
	Morton Andrew Morton <akpm@...l.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Fastboot mailing list <fastboot@...ts.osdl.org>,
	Jean Delvare <khali@...ux-fr.org>,
	Segher Boessenkool <segher@...nel.crashing.org>
Subject: Re: [PATCH] i386 kernel instant reboot with older binutils fix

On Wed, Jan 03, 2007 at 02:53:26PM +0100, Adrian Bunk wrote:
> On Wed, Jan 03, 2007 at 09:46:45AM +0530, Vivek Goyal wrote:
> >
> > o i386 kernel reboots instantly if compiled with binutils older than
> >   2.6.15.
> 
> Should that have been "2.15"?
> 

Yes Adrian, it should be 2.15 instead. My mistake.

Hopefully this patch should solve steve's issue too.

Reattaching the patch with corrected changelog.

Thanks
Vivek


o i386 kernel reboots instantly if compiled with binutils older than
  2.15.

o Older binutils required explicit flags to mark a section allocatable
  and executable(AX). Newer binutils automatically mark a section AX if
  the name starts with .text.

o While defining a new section using assembler "section" directive,
  explicitly mention section flags. 

Signed-off-by: Segher Boessenkool <segher@...nel.crashing.org>
Signed-off-by: Vivek Goyal <vgoyal@...ibm.com>
---

 arch/i386/boot/compressed/head.S |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN arch/i386/boot/compressed/head.S~jean-reboot-issue-fix arch/i386/boot/compressed/head.S
--- linux-2.6.20-rc2-reloc/arch/i386/boot/compressed/head.S~jean-reboot-issue-fix	2007-01-02 09:54:56.000000000 +0530
+++ linux-2.6.20-rc2-reloc-root/arch/i386/boot/compressed/head.S	2007-01-02 09:57:46.000000000 +0530
@@ -28,7 +28,7 @@
 #include <asm/page.h>
 #include <asm/boot.h>
 
-.section ".text.head"
+.section ".text.head","ax",@progbits
 	.globl startup_32
 
 startup_32:
_
-
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