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KVM: async_pf: Allow to wait for outstanding work

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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>
(cherry picked from commit 9f2ceda49c)
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Dominik Dingel
2013-09-03 12:31:16 +02:00
committed by Christoffer Dall
parent e9aa8f627c
commit 65d762a03f
1 changed files with 5 additions and 0 deletions
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5
virt/kvm/async_pf.c
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@@ -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);