linux-kernel - [PATCH] KVM: Use consistent type for return value of kvm_mmu_memory_cache_nr_free

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Message-ID: <20220614093222.25387-1-liubo03@inspur.com>
Date:   Tue, 14 Jun 2022 05:32:22 -0400
From:   Bo Liu <liubo03@...pur.com>
To:     <pbonzini@...hat.com>
CC:     <kvm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Bo Liu <liubo03@...pur.com>
Subject: [PATCH] KVM: Use consistent type for return value of kvm_mmu_memory_cache_nr_free_objects()

The return value type of the function rmap_can_add() is "bool", and it will
returns the result of the function kvm_mmu_memory_cache_nr_free_objects().
So we should change the return value type of
kvm_mmu_memory_cache_nr_free_objects() to "bool".

Signed-off-by: Bo Liu <liubo03@...pur.com>
---
 include/linux/kvm_host.h | 2 +-
 virt/kvm/kvm_main.c      | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index c20f2d55840c..a399a7485795 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1358,7 +1358,7 @@ void kvm_flush_remote_tlbs(struct kvm *kvm);
 
 #ifdef KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE
 int kvm_mmu_topup_memory_cache(struct kvm_mmu_memory_cache *mc, int min);
-int kvm_mmu_memory_cache_nr_free_objects(struct kvm_mmu_memory_cache *mc);
+bool kvm_mmu_memory_cache_nr_free_objects(struct kvm_mmu_memory_cache *mc);
 void kvm_mmu_free_memory_cache(struct kvm_mmu_memory_cache *mc);
 void *kvm_mmu_memory_cache_alloc(struct kvm_mmu_memory_cache *mc);
 #endif
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index a67e996cbf7f..2872569e3580 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -394,9 +394,9 @@ int kvm_mmu_topup_memory_cache(struct kvm_mmu_memory_cache *mc, int min)
 	return 0;
 }
 
-int kvm_mmu_memory_cache_nr_free_objects(struct kvm_mmu_memory_cache *mc)
+bool kvm_mmu_memory_cache_nr_free_objects(struct kvm_mmu_memory_cache *mc)
 {
-	return mc->nobjs;
+	return !!mc->nobjs;
 }
 
 void kvm_mmu_free_memory_cache(struct kvm_mmu_memory_cache *mc)
-- 
2.27.0