linux-kernel - [PATCH v4 01/10] KVM: MMU: return bool in __rmap_write

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Date:	Wed, 25 Apr 2012 12:01:05 +0800
From:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
To:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
CC:	Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: [PATCH v4 01/10] KVM: MMU: return bool in __rmap_write_protect

The reture value of __rmap_write_protect is either 1 or 0, use
true/false instead of these

Signed-off-by: Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
---
 arch/x86/kvm/mmu.c |   13 +++++++------
 1 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 29ad6f9..4a3cc18 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1041,11 +1041,12 @@ static void drop_spte(struct kvm *kvm, u64 *sptep)
 		rmap_remove(kvm, sptep);
 }

-static int __rmap_write_protect(struct kvm *kvm, unsigned long *rmapp, int level)
+static bool
+__rmap_write_protect(struct kvm *kvm, unsigned long *rmapp, int level)
 {
 	u64 *sptep;
 	struct rmap_iterator iter;
-	int write_protected = 0;
+	bool write_protected = false;

 	for (sptep = rmap_get_first(*rmapp, &iter); sptep;) {
 		BUG_ON(!(*sptep & PT_PRESENT_MASK));
@@ -1066,7 +1067,7 @@ static int __rmap_write_protect(struct kvm *kvm, unsigned long *rmapp, int level
 			sptep = rmap_get_first(*rmapp, &iter);
 		}

-		write_protected = 1;
+		write_protected = true;
 	}

 	return write_protected;
@@ -1097,12 +1098,12 @@ void kvm_mmu_write_protect_pt_masked(struct kvm *kvm,
 	}
 }

-static int rmap_write_protect(struct kvm *kvm, u64 gfn)
+static bool rmap_write_protect(struct kvm *kvm, u64 gfn)
 {
 	struct kvm_memory_slot *slot;
 	unsigned long *rmapp;
 	int i;
-	int write_protected = 0;
+	bool write_protected = false;

 	slot = gfn_to_memslot(kvm, gfn);

@@ -1691,7 +1692,7 @@ static void mmu_sync_children(struct kvm_vcpu *vcpu,

 	kvm_mmu_pages_init(parent, &parents, &pages);
 	while (mmu_unsync_walk(parent, &pages)) {
-		int protected = 0;
+		bool protected = false;

 		for_each_sp(pages, sp, parents, i)
 			protected |= rmap_write_protect(vcpu->kvm, sp->gfn);
-- 
1.7.7.6

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