linux-kernel - [PATCH] KVM: MMU: use page table level macro

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Date:	Wed, 18 Apr 2012 12:24:29 +0200
From:	Davidlohr Bueso <dave@....org>
To:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>
Cc:	KVM <kvm@...r.kernel.org>, lkml <linux-kernel@...r.kernel.org>
Subject: [PATCH] KVM: MMU: use page table level macro

From: Davidlohr Bueso <dave@....org>

Its much cleaner to use PT_PAGE_TABLE_LEVEL than its numeric value.

Signed-off-by: Davidlohr Bueso <dave@....org>
---
 arch/x86/kvm/mmu.c         |    2 +-
 arch/x86/kvm/paging_tmpl.h |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 4cb1642..163a008 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3554,7 +3554,7 @@ static bool detect_write_flooding(struct kvm_mmu_page *sp)
 	 * Skip write-flooding detected for the sp whose level is 1, because
 	 * it can become unsync, then the guest page is not write-protected.
 	 */
-	if (sp->role.level == 1)
+	if (sp->role.level == PT_PAGE_TABLE_LEVEL)
 		return false;
 
 	return ++sp->write_flooding_count >= 3;
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index df5a703..34f9709 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -658,7 +658,7 @@ static gpa_t FNAME(get_level1_sp_gpa)(struct kvm_mmu_page *sp)
 {
 	int offset = 0;
 
-	WARN_ON(sp->role.level != 1);
+	WARN_ON(sp->role.level != PT_PAGE_TABLE_LEVEL);
 
 	if (PTTYPE == 32)
 		offset = sp->role.quadrant << PT64_LEVEL_BITS;
-- 
1.7.4.1



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