[PATCH]Replace 0 with NULL when returning a pointer

[Cong WANG]

Use NULL to indicate we are returning a pointer rather than an integer
and to eliminate some sparse warnings.

Signed-off-by: Cong WANG <xiyou.wangcong@xxxxxxxxx>

---
--- drivers/kvm/kvm_main.c.orig	2007-03-11 21:41:23.000000000 +0800
+++ drivers/kvm/kvm_main.c	2007-03-12 14:26:17.000000000 +0800
@@ -205,7 +205,7 @@ static struct kvm_vcpu *vcpu_load(struct
	mutex_lock(&vcpu->mutex);
	if (unlikely(!vcpu->vmcs)) {
		mutex_unlock(&vcpu->mutex);
-		return 0;
+		return NULL;
	}
	return kvm_arch_ops->vcpu_load(vcpu);
}
@@ -799,7 +799,7 @@ struct kvm_memory_slot *gfn_to_memslot(s
		    && gfn < memslot->base_gfn + memslot->npages)
			return memslot;
	}
-	return 0;
+	return NULL;
}
EXPORT_SYMBOL_GPL(gfn_to_memslot);
-
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