From: Davidlohr Bueso <dave@stgolabs.net>
Date: Wed, 13 Sep 2017 20:08:19 +0000 (-0700)
Subject: kvm,async_pf: Use swq_has_sleeper()
X-Git-Tag: v4.14-rc1~10^2~8
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b9f67a420b3d76991592558af06e9cf1b8953b3d;p=platform%2Fkernel%2Flinux-rpi.git

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>
---

diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c
index bb298a2..57bcb27 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);