linux-kernel - Re: [PATCH 09/14] s390: Use macros for .data.page

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Date:	Tue, 28 Apr 2009 11:39:07 +0400
From:	Cyrill Gorcunov <gorcunov@...nvz.org>
To:	Tim Abbott <tabbott@....edu>
Cc:	Sam Ravnborg <sam@...nborg.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Anders Kaseorg <andersk@....edu>,
	Waseem Daher <wdaher@....edu>,
	Denys Vlasenko <vda.linux@...glemail.com>,
	Jeff Arnold <jbarnold@....edu>,
	Paul Mundt <lethal@...ux-sh.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>
Subject: Re: [PATCH 09/14] s390: Use macros for .data.page_aligned.

On 4/28/09, Tim Abbott <tabbott@....edu> wrote:
> .data.page_aligned should not need a separate output section, so as
> part of this cleanup I moved into the .data output section in the
> linker scripts in order to eliminate unnecessary references to the
> section name.
>
> Remove the reference to .data.idt, since nothing is put into the
> .data.idt section on the s390 architecture.  It looks like Cyrill
> Gorcunov posted a patch to remove the .data.idt code on s390
> previously:
>
> <http://lkml.indiana.edu/hypermail/linux/kernel/0802.2/2536.html>
>
> CCing him and the people who acked that patch in case there's a reason
> it wasn't applied.
>

It was not applied case of being a bit buggy.
You've fixed it as well. Thanks and my ack if needed.

> Signed-off-by: Tim Abbott <tabbott@....edu>
> Cc: Martin Schwidefsky <schwidefsky@...ibm.com>
> Cc: Cyrill Gorcunov <gorcunov@...nvz.org>
> Cc: Sam Ravnborg <sam@...nborg.org>
> ---
>  arch/s390/kernel/vdso.c                  |    2 +-
>  arch/s390/kernel/vdso32/vdso32_wrapper.S |    3 ++-
>  arch/s390/kernel/vdso64/vdso64_wrapper.S |    3 ++-
>  arch/s390/kernel/vmlinux.lds.S           |    6 +-----
>  4 files changed, 6 insertions(+), 8 deletions(-)
>
> diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
> index 89b2e7f..eff6fba 100644
> --- a/arch/s390/kernel/vdso.c
> +++ b/arch/s390/kernel/vdso.c
> @@ -64,7 +64,7 @@ __setup("vdso=", vdso_setup);
>  static union {
>  	struct vdso_data	data;
>  	u8			page[PAGE_SIZE];
> -} vdso_data_store __attribute__((__section__(".data.page_aligned")));
> +} vdso_data_store __page_aligned_data
>  struct vdso_data *vdso_data = &vdso_data_store.data;
>
>  /*
> diff --git a/arch/s390/kernel/vdso32/vdso32_wrapper.S
> b/arch/s390/kernel/vdso32/vdso32_wrapper.S
> index 61639a8..ae42f8c 100644
> --- a/arch/s390/kernel/vdso32/vdso32_wrapper.S
> +++ b/arch/s390/kernel/vdso32/vdso32_wrapper.S
> @@ -1,7 +1,8 @@
>  #include <linux/init.h>
> +#include <linux/linkage.h>
>  #include <asm/page.h>
>
> -	.section ".data.page_aligned"
> +	__PAGE_ALIGNED_DATA
>
>  	.globl vdso32_start, vdso32_end
>  	.balign PAGE_SIZE
> diff --git a/arch/s390/kernel/vdso64/vdso64_wrapper.S
> b/arch/s390/kernel/vdso64/vdso64_wrapper.S
> index d8e2ac1..c245842 100644
> --- a/arch/s390/kernel/vdso64/vdso64_wrapper.S
> +++ b/arch/s390/kernel/vdso64/vdso64_wrapper.S
> @@ -1,7 +1,8 @@
>  #include <linux/init.h>
> +#include <linux/linkage.h>
>  #include <asm/page.h>
>
> -	.section ".data.page_aligned"
> +	__PAGE_ALIGNED_DATA
>
>  	.globl vdso64_start, vdso64_end
>  	.balign PAGE_SIZE
> diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S
> index 89399b8..d552089 100644
> --- a/arch/s390/kernel/vmlinux.lds.S
> +++ b/arch/s390/kernel/vmlinux.lds.S
> @@ -59,6 +59,7 @@ SECTIONS
>  	} :data
>
>  	.data : {		/* Data */
> +		PAGE_ALIGNED_DATA
>  		DATA_DATA
>  		CONSTRUCTORS
>  	}
> @@ -71,11 +72,6 @@ SECTIONS
>  	. = ALIGN(PAGE_SIZE);
>  	__nosave_end = .;
>
> -	. = ALIGN(PAGE_SIZE);
> -	.data.page_aligned : {
> -		*(.data.idt)
> -	}
> -
>  	. = ALIGN(0x100);
>  	.data.cacheline_aligned : {
>  		*(.data.cacheline_aligned)
> --
> 1.6.2.1
>
>
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