linux-kernel - Re: [PATCH 2/8] powerpc: share .data output section definition between 32 and 64 bits.

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Date:	Fri, 01 May 2009 11:46:42 +1000
From:	Michael Ellerman <michael@...erman.id.au>
To:	Tim Abbott <tabbott@....EDU>
Cc:	Sam Ravnborg <sam@...nborg.org>,
	Denys Vlasenko <vda.linux@...glemail.com>,
	Jeff Arnold <jbarnold@....EDU>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Anders Kaseorg <andersk@....EDU>, linuxppc-dev@...abs.org,
	Paul Mackerras <paulus@...ba.org>,
	Waseem Daher <wdaher@....EDU>
Subject: Re: [PATCH 2/8] powerpc: share .data output section definition
 between 32 and 64 bits.

On Thu, 2009-04-30 at 19:56 -0400, Tim Abbott wrote:
> Since upcoming changes will add several more common pieces of code
> between the 32-bit and 64-bit powerpc architectures, it seems best to
> unify these two blocks.
> 
> Signed-off-by: Tim Abbott <tabbott@....edu>
> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> Cc: Paul Mackerras <paulus@...ba.org>
> Cc: linuxppc-dev@...abs.org
> ---
>  arch/powerpc/kernel/vmlinux.lds.S |    7 +++----
>  1 files changed, 3 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
> index a047a6c..47899b0 100644
> --- a/arch/powerpc/kernel/vmlinux.lds.S
> +++ b/arch/powerpc/kernel/vmlinux.lds.S
> @@ -220,20 +220,19 @@ SECTIONS
>  	. = ALIGN(PAGE_SIZE);
>  	_sdata = .;
>  
> -#ifdef CONFIG_PPC32
>  	.data : AT(ADDR(.data) - LOAD_OFFSET) {
>  		DATA_DATA
> +#ifdef CONFIG_PPC32
>  		*(.sdata)
>  		*(.got.plt) *(.got)
> -	}
>  #else
> -	.data : AT(ADDR(.data) - LOAD_OFFSET) {
> -		DATA_DATA
>  		*(.data.rel*)
>  		*(.toc1)
>  		*(.branch_lt)
> +#endif
>  	}
>  
> +#ifndef CONFIG_PPC32
>  	.opd : AT(ADDR(.opd) - LOAD_OFFSET) {
>  		*(.opd)
>  	}

This would be clearer in the positive, as in #ifdef CONFIG_PPC64.

cheers

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