linux-kernel - [PATCH 2/3] arch/powerpc: use __page_aligned

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Date:	Wed, 28 May 2008 17:04:49 +0100
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Paul Mackerras <paulus@...ba.org>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	Ingo Molnar <mingo@...e.hu>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Sam Ravnborg <sam@...nborg.org>
Subject: [PATCH 2/3] arch/powerpc: use __page_aligned_bss

The patch "make page-aligned data and bss less fragile" introduces
__page_aligned_data and __page_aligned_bss to make sure that page
aligned things remain so, even if there are non-page-sized
page-aligned things.

This paragraph converts an instance of an explicit section attribute
to __page_aligned_data.  It's purely decorative.

(It should be noted that powerpc already defines __page_aligned to
have the same meaning as __page_aligned_data in non-MODULE code.  Also
this particular case looks like it could be __page_aligned_bss rather
than data, but I didn't want to change the meaning of the code.)

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Cc: Paul Mackerras <paulus@...ba.org>
---
 arch/powerpc/kernel/vdso.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

===================================================================
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -14,6 +14,7 @@
 #include <linux/kernel.h>
 #include <linux/mm.h>
 #include <linux/smp.h>
+#include <linux/linkage.h>
 #include <linux/stddef.h>
 #include <linux/unistd.h>
 #include <linux/slab.h>
@@ -74,7 +75,7 @@
 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;
 
 /* Format of the patch table */


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