linux-kernel - [PATCH] x86_64: Align data segment to PAGE

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Message-ID: <20061120162909.GJ11450@in.ibm.com>
Date:	Mon, 20 Nov 2006 11:29:09 -0500
From:	Vivek Goyal <vgoyal@...ibm.com>
To:	Andi Kleen <ak@....de>
Cc:	linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Fastboot mailing list <fastboot@...ts.osdl.org>
Subject: [PATCH] x86_64: Align data segment to PAGE_SIZE boundary

Hi Andi,

This patch was previously part of relocatable kernel series but now I have
forked it out as it is required for 2.6.19 kernels and relocatable kernel
patches have to wait.

Please apply.

Thanks
Vivek


o Explicitly align data segment to PAGE_SIZE boundary otherwise depending on
  config options and tool chain it might be placed on a non PAGE_SIZE aligned
  boundary and vmlinux loaders like kexec fail when they encounter a 
  PT_LOAD type segment which is not aligned to PAGE_SIZE boundary.

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

 arch/x86_64/kernel/vmlinux.lds.S |    1 +
 1 file changed, 1 insertion(+)

diff -puN arch/x86_64/kernel/vmlinux.lds.S~x86_64-align-data-segment-to-4K-boundary arch/x86_64/kernel/vmlinux.lds.S
--- linux-2.6.19-rc6-reloc/arch/x86_64/kernel/vmlinux.lds.S~x86_64-align-data-segment-to-4K-boundary	2006-11-17 00:05:06.000000000 -0500
+++ linux-2.6.19-rc6-reloc-root/arch/x86_64/kernel/vmlinux.lds.S	2006-11-17 00:05:06.000000000 -0500
@@ -60,6 +60,7 @@ SECTIONS
   }
 #endif
 
+  . = ALIGN(PAGE_SIZE);        /* Align data segment to page size boundary */
 				/* Data */
   .data : AT(ADDR(.data) - LOAD_OFFSET) {
 	*(.data)
_
-
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