kvm,async_pf: Use swq_has_sleeper()

... as we've got the new helper now. This caller already
does the right thing, hence no changes in semantics.

Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 5 deletions

diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c
index bb298a200cd3..57bcb27dcf30 100644
--- a/virt/kvm/async_pf.c
+++ b/virt/kvm/async_pf.c
@@ -106,11 +106,7 @@ static void async_pf_execute(struct work_struct *work)
 
         trace_kvm_async_pf_completed(addr, gva);
 
-        /*
-         * This memory barrier pairs with prepare_to_wait's set_current_state()
-         */
-        smp_mb();
-        if (swait_active(&vcpu->wq))
+        if (swq_has_sleeper(&vcpu->wq))
                 swake_up(&vcpu->wq);
 
         mmput(mm);