From f9fbf1a36a6bb6a639459802bccee01185ee3220 Mon Sep 17 00:00:00 2001
From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Mon, 17 Mar 2008 16:37:04 -0700
Subject: x86/pgtable.h: demacro ptep_test_and_clear_young

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
 arch/x86/mm/pgtable.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'arch/x86')

diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index e7cda2057e1d..54bd77a7eee0 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -280,3 +280,18 @@ int ptep_set_access_flags(struct vm_area_struct *vma,
 
 	return changed;
 }
+
+int ptep_test_and_clear_young(struct vm_area_struct *vma,
+			      unsigned long addr, pte_t *ptep)
+{
+	int ret = 0;
+
+	if (pte_young(*ptep))
+		ret = test_and_clear_bit(_PAGE_BIT_ACCESSED,
+					 &ptep->pte);
+
+	if (ret)
+		pte_update(vma->vm_mm, addr, ptep);
+
+	return ret;
+}
-- 
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