linux-kernel - [PATCH] x86/xen: fix arbitrary_virt_to

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Message-Id: <482C47B4.76E4.0078.0@novell.com>
Date:	Thu, 15 May 2008 13:24:52 +0100
From:	"Jan Beulich" <jbeulich@...ell.com>
To:	<mingo@...e.hu>, "Jeremy Fitzhardinge" <jeremy@...p.org>,
	<tglx@...utronix.de>, <hpa@...or.com>
Cc:	<linux-kernel@...r.kernel.org>
Subject: [PATCH] x86/xen: fix arbitrary_virt_to_machine()

While I realize that the function isn't currently being used, I still
think an obvious mistake like this should be corrected.

Signed-off-by: Jan Beulich <jbeulich@...ell.com>

--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -60,7 +60,7 @@ xmaddr_t arbitrary_virt_to_machine(unsig
 {
 	unsigned int level;
 	pte_t *pte = lookup_address(address, &level);
-	unsigned offset = address & PAGE_MASK;
+	unsigned offset = address & (PAGE_SIZE - 1);
 
 	BUG_ON(pte == NULL);
 


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