linux-kernel - [PATCH 3/11] i386: Force data segment to be 4K aligned

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Message-ID: <20061023193057.GD13263@in.ibm.com>
Date:	Mon, 23 Oct 2006 15:30:57 -0400
From:	Vivek Goyal <vgoyal@...ibm.com>
To:	linux kernel mailing list <linux-kernel@...r.kernel.org>
Cc:	Reloc Kernel List <fastboot@...ts.osdl.org>, ebiederm@...ssion.com,
	akpm@...l.org, ak@...e.de, hpa@...or.com, magnus.damm@...il.com,
	lwang@...hat.com, dzickus@...hat.com, maneesh@...ibm.com
Subject: [PATCH 3/11] i386: Force data segment to be 4K aligned



o Currently there is no specific alignment restriction in linker script
  and in some cases it can be placed non 4K aligned addresses. This fails
  kexec which checks that segment to be loaded is page aligned.

o I guess, it does not harm data segment to be 4K aligned.

Signed-off-by: Vivek Goyal <vgoyal@...ibm.com>
---

 arch/i386/kernel/vmlinux.lds.S |    1 +
 1 file changed, 1 insertion(+)

diff -puN arch/i386/kernel/vmlinux.lds.S~i386-force-data-section-to-4K-aligned arch/i386/kernel/vmlinux.lds.S
--- linux-2.6.19-rc2-git7-reloc/arch/i386/kernel/vmlinux.lds.S~i386-force-data-section-to-4K-aligned	2006-10-23 13:15:21.000000000 -0400
+++ linux-2.6.19-rc2-git7-reloc-root/arch/i386/kernel/vmlinux.lds.S	2006-10-23 15:08:55.000000000 -0400
@@ -52,6 +52,7 @@ SECTIONS
   }
 
   /* writeable */
+  . = ALIGN(4096);
   .data : AT(ADDR(.data) - LOAD_OFFSET) {	/* Data */
 	*(.data)
 	CONSTRUCTORS
_
-
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