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authorPetr Mladek <pmladek@suse.com>2016-10-19 14:50:47 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2016-12-08 17:31:11 +0300
commit36da91bdf568e804aac3ef02a5e3d867585f08fb (patch)
treeb1bd594acd9e661f26cdcb2afc4c0f0949555682 /arch/x86/kvm/i8254.c
parent16c2aec6a295f8a4916dbcbaa5051cf5c78be56a (diff)
downloadlinux-36da91bdf568e804aac3ef02a5e3d867585f08fb.tar.xz
KVM: x86: Handle the kthread worker using the new API
Use the new API to create and destroy the "kvm-pit" kthread worker. The API hides some implementation details. In particular, kthread_create_worker() allocates and initializes struct kthread_worker. It runs the kthread the right way and stores task_struct into the worker structure. kthread_destroy_worker() flushes all pending works, stops the kthread and frees the structure. This patch does not change the existing behavior except for dynamically allocating struct kthread_worker and storing only the pointer of this structure. It is compile tested only because I did not find an easy way how to run the code. Well, it should be pretty safe given the nature of the change. Signed-off-by: Petr Mladek <pmladek@suse.com> Message-Id: <1476877847-11217-1-git-send-email-pmladek@suse.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/i8254.c')
-rw-r--r--arch/x86/kvm/i8254.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index 16a7134eedac..a78b445ce411 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -212,7 +212,7 @@ static void kvm_pit_ack_irq(struct kvm_irq_ack_notifier *kian)
*/
smp_mb();
if (atomic_dec_if_positive(&ps->pending) > 0)
- kthread_queue_work(&pit->worker, &pit->expired);
+ kthread_queue_work(pit->worker, &pit->expired);
}
void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu)
@@ -272,7 +272,7 @@ static enum hrtimer_restart pit_timer_fn(struct hrtimer *data)
if (atomic_read(&ps->reinject))
atomic_inc(&ps->pending);
- kthread_queue_work(&pt->worker, &pt->expired);
+ kthread_queue_work(pt->worker, &pt->expired);
if (ps->is_periodic) {
hrtimer_add_expires_ns(&ps->timer, ps->period);
@@ -667,10 +667,8 @@ struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags)
pid_nr = pid_vnr(pid);
put_pid(pid);
- kthread_init_worker(&pit->worker);
- pit->worker_task = kthread_run(kthread_worker_fn, &pit->worker,
- "kvm-pit/%d", pid_nr);
- if (IS_ERR(pit->worker_task))
+ pit->worker = kthread_create_worker(0, "kvm-pit/%d", pid_nr);
+ if (IS_ERR(pit->worker))
goto fail_kthread;
kthread_init_work(&pit->expired, pit_do_work);
@@ -713,7 +711,7 @@ fail_register_speaker:
fail_register_pit:
mutex_unlock(&kvm->slots_lock);
kvm_pit_set_reinject(pit, false);
- kthread_stop(pit->worker_task);
+ kthread_destroy_worker(pit->worker);
fail_kthread:
kvm_free_irq_source_id(kvm, pit->irq_source_id);
fail_request:
@@ -730,8 +728,7 @@ void kvm_free_pit(struct kvm *kvm)
kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, &pit->speaker_dev);
kvm_pit_set_reinject(pit, false);
hrtimer_cancel(&pit->pit_state.timer);
- kthread_flush_work(&pit->expired);
- kthread_stop(pit->worker_task);
+ kthread_destroy_worker(pit->worker);
kvm_free_irq_source_id(kvm, pit->irq_source_id);
kfree(pit);
}