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-rw-r--r--virt/kvm/async_pf.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c
index 100c66ee022..74268b4c2ee 100644
--- a/virt/kvm/async_pf.c
+++ b/virt/kvm/async_pf.c
@@ -196,7 +196,7 @@ int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu)
{
struct kvm_async_pf *work;
- if (!list_empty(&vcpu->async_pf.done))
+ if (!list_empty_careful(&vcpu->async_pf.done))
return 0;
work = kmem_cache_zalloc(async_pf_cache, GFP_ATOMIC);
@@ -207,7 +207,10 @@ int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu)
get_page(bad_page);
INIT_LIST_HEAD(&work->queue); /* for list_del to work */
+ spin_lock(&vcpu->async_pf.lock);
list_add_tail(&work->link, &vcpu->async_pf.done);
+ spin_unlock(&vcpu->async_pf.lock);
+
vcpu->async_pf.queued++;
return 0;
}