From: David Hildenbrand <david@redhat.com>
Date: Thu, 24 Aug 2017 20:51:24 +0200
Subject: KVM: x86: mmu: free_page can handle NULL
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Patch-mainline: v4.15-rc1
Git-commit: 87ca74ad920ccc8b9fd1c00bd7177070f17ebc95
References: bsc#1077761

Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Acked-by: Alexander Graf <agraf@suse.de>
---
 arch/x86/kvm/mmu.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -4993,8 +4993,7 @@
 static void free_mmu_pages(struct kvm_vcpu *vcpu)
 {
 	free_page((unsigned long)vcpu->arch.mmu.pae_root);
-	if (vcpu->arch.mmu.lm_root != NULL)
-		free_page((unsigned long)vcpu->arch.mmu.lm_root);
+	free_page((unsigned long)vcpu->arch.mmu.lm_root);
 }
 
 static int alloc_mmu_pages(struct kvm_vcpu *vcpu)