KVM: MMU: fix bogus alloc_mmu_pages assignment

Remove the bogus n_free_mmu_pages assignment from alloc_mmu_pages.

It breaks accounting of mmu pages, since n_free_mmu_pages is modified
but the real number of pages remains the same.

Cc: stable@kernel.org
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 28be35c..6f38178 100644 (file)
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2786,14 +2786,6 @@ static int alloc_mmu_pages(struct kvm_vcpu *vcpu)
 
        ASSERT(vcpu);
 
-       spin_lock(&vcpu->kvm->mmu_lock);
-       if (vcpu->kvm->arch.n_requested_mmu_pages)
-               vcpu->kvm->arch.n_free_mmu_pages =
-                                       vcpu->kvm->arch.n_requested_mmu_pages;
-       else
-               vcpu->kvm->arch.n_free_mmu_pages =
-                                       vcpu->kvm->arch.n_alloc_mmu_pages;
-       spin_unlock(&vcpu->kvm->mmu_lock);
        /*
         * When emulating 32-bit mode, cr3 is only 32 bits even on x86_64.
         * Therefore we need to allocate shadow page tables in the first