From: Dominik Dingel <dingel@linux.vnet.ibm.com>
Date: Tue, 3 Sep 2013 10:31:16 +0000 (+0200)
Subject: KVM: async_pf: Allow to wait for outstanding work
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=9f2ceda49c6b8827c795731c204f6c2587886e2c;p=linux-beck.git

KVM: async_pf: Allow to wait for outstanding work

On s390 we are not able to cancel work. Instead we will flush the work and wait for
completion.

Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
---

diff --git a/virt/kvm/async_pf.c b/virt/kvm/async_pf.c
index 00980ab02c45..889aad022014 100644
--- a/virt/kvm/async_pf.c
+++ b/virt/kvm/async_pf.c
@@ -113,11 +113,16 @@ void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu)
 			list_entry(vcpu->async_pf.queue.next,
 				   typeof(*work), queue);
 		list_del(&work->queue);
+
+#ifdef CONFIG_KVM_ASYNC_PF_SYNC
+		flush_work(&work->work);
+#else
 		if (cancel_work_sync(&work->work)) {
 			mmdrop(work->mm);
 			kvm_put_kvm(vcpu->kvm); /* == work->vcpu->kvm */
 			kmem_cache_free(async_pf_cache, work);
 		}
+#endif
 	}
 
 	spin_lock(&vcpu->async_pf.lock);