From 1e8e23bc469a11fc190a6bace857075d83dc2555 Mon Sep 17 00:00:00 2001
From: Andi Kleen <ak@suse.de>
Date: Wed, 30 Jan 2008 13:33:53 +0100
Subject: [PATCH] x86: introduce canon_pgprot()

Introduce canon_pgprot()

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 include/asm-x86/pgtable.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h
index 2f93723a3e18..2726ddc457fd 100644
--- a/include/asm-x86/pgtable.h
+++ b/include/asm-x86/pgtable.h
@@ -189,6 +189,8 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
 
 #define pte_pgprot(x) __pgprot(pte_val(x) & (0xfff | _PAGE_NX))
 
+#define canon_pgprot(p) __pgprot(pgprot_val(p) & __supported_pte_mask)
+
 #ifdef CONFIG_PARAVIRT
 #include <asm/paravirt.h>
 #else  /* !CONFIG_PARAVIRT */
-- 
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