linux-kernel - Re: sh: include empty_zero

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Date:	Thu, 11 Jun 2009 22:10:48 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Magnus Damm <damm@...l.co.jp>, Paul Mundt <lethal@...ux-sh.org>
Cc:	git-commits-head@...r.kernel.org
Subject: Re: sh: include empty_zero_page in text

On Thu, Jun 11, 2009 at 07:03:02PM +0000, Linux Kernel Mailing List wrote:
> Gitweb:     http://git.kernel.org/linus/53c0054c3f11b49fc09f24e46f58661def952728
> Commit:     53c0054c3f11b49fc09f24e46f58661def952728
> Parent:     7bce6c2740fab36708233e998a9e53115649b193
> Author:     Magnus Damm <damm@...l.co.jp>
> AuthorDate: Mon May 11 08:45:27 2009 +0000
> Committer:  Paul Mundt <lethal@...ux-sh.org>
> CommitDate: Mon May 11 18:42:14 2009 +0900
> 
>     sh: include empty_zero_page in text
>     
>     Include empty_zero_page in _text. This fixes a problem
>     introduced by c3e2586b794b12ffcdf69b4e547030b51e18e6d9
>     which results in broken boot on R2D-Plus.
>     
>     Signed-off-by: Magnus Damm <damm@...l.co.jp>
>     Signed-off-by: Paul Mundt <lethal@...ux-sh.org>
> ---
>  arch/sh/kernel/vmlinux.lds.S |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/sh/kernel/vmlinux.lds.S b/arch/sh/kernel/vmlinux.lds.S
> index d737230..f53c76a 100644
> --- a/arch/sh/kernel/vmlinux.lds.S
> +++ b/arch/sh/kernel/vmlinux.lds.S
> @@ -26,12 +26,13 @@ SECTIONS
>  	. = CONFIG_PAGE_OFFSET + CONFIG_MEMORY_START + CONFIG_ZERO_PAGE_OFFSET;
>  #endif
>  
> +	_text = .;		/* Text and read-only data */
> +
>  	.empty_zero_page : AT(ADDR(.empty_zero_page) - LOAD_OFFSET) {
>  		*(.empty_zero_page)
>  	} = 0
>  
>  	.text : AT(ADDR(.text) - LOAD_OFFSET) {
> -		_text = .;		/* Text and read-only data */
>  		HEAD_TEXT
>  		TEXT_TEXT

This change turned _text to be an absolute symbol.
Do you support rolocatable kernels then this may fail.

	Sam
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