linux-kernel - [PATCH] xen: Fix for xen guest with mem

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Date:	Sun, 14 Sep 2008 07:42:23 -0700
From:	Jeremy Fitzhardinge <jeremy@...p.org>
To:	Ingo Molnar <mingo@...e.hu>
CC:	roberto@...it.it, jeremy@...source.com,
	linux-kernel@...r.kernel.org, Mirko Iannella <mirko@...it.it>,
	Alex Nixon <alex.nixon@...rix.com>
Subject: [PATCH] xen: Fix for xen guest with mem > 3.7G

PFN_PHYS() can truncate large addresses unless its passed a suitable
large type.  This is fixed more generally in the patch series
introducing phys_addr_t, but we need a short-term fix to solve a
regression.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Cc: roberto@...it.it
---
 arch/x86/xen/setup.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

===================================================================
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -42,7 +42,7 @@
 
 	e820.nr_map = 0;
 
-	e820_add_region(0, PFN_PHYS(max_pfn), E820_RAM);
+	e820_add_region(0, PFN_PHYS((u64)max_pfn), E820_RAM);
 
 	/*
 	 * Even though this is normal, usable memory under Xen, reserve


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