[kvm-commits] [PATCH] KVM: MMU: Broaden scope of mmap_sem to include actual mapping

[Avi Kivity]

From: Avi Kivity <[EMAIL PROTECTED]>

Signed-off-by: Avi Kivity <[EMAIL PROTECTED]>

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index bfdff1a..c478ee2 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1018,12 +1018,14 @@ static int nonpaging_map(struct kvm_vcpu *vcpu, gva_t 
v, int write, gfn_t gfn)
 
        down_read(&current->mm->mmap_sem);
        page = gfn_to_page(vcpu->kvm, gfn);
-       up_read(&current->mm->mmap_sem);
 
        spin_lock(&vcpu->kvm->mmu_lock);
        kvm_mmu_free_some_pages(vcpu);
        r = __nonpaging_map(vcpu, v, write, gfn, page);
        spin_unlock(&vcpu->kvm->mmu_lock);
+
+       up_read(&current->mm->mmap_sem);
+
        return r;
 }
 

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