[PATCH 1/2] KVM: kvm_is_visible_gfn can be boolean

[Yaowei Bai]

This patch makes kvm_is_visible_gfn return bool due to this particular
function only using either one or zero as its return value.

No functional change.

Signed-off-by: Yaowei Bai <baiyao...@cmss.chinamobile.com>
---
 include/linux/kvm_host.h | 2 +-
 virt/kvm/kvm_main.c      | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 5706a21..4436539 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -623,7 +623,7 @@ int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct 
gfn_to_hva_cache *ghc,
 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
 int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
 struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
-int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
+bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
 unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
 void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
 
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 484079e..73cbb41 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1164,15 +1164,15 @@ struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct 
kvm_vcpu *vcpu, gfn_t gfn
        return __gfn_to_memslot(kvm_vcpu_memslots(vcpu), gfn);
 }
 
-int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
+bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
 {
        struct kvm_memory_slot *memslot = gfn_to_memslot(kvm, gfn);
 
        if (!memslot || memslot->id >= KVM_USER_MEM_SLOTS ||
              memslot->flags & KVM_MEMSLOT_INVALID)
-               return 0;
+               return false;
 
-       return 1;
+       return true;
 }
 EXPORT_SYMBOL_GPL(kvm_is_visible_gfn);
 
-- 
1.9.1



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