| Message ID | jpgiocywg3x.fsf@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Apr 14, 2015 at 05:32:34PM -0400, Bandan Das wrote: > > Code Cleanup, kthread_run is a convenient wrapper > around kthread_create() that even wakes up the process > for us. Use it and remove no longer needed temp > task_struct variable. > > Signed-off-by: Bandan Das <bsd@redhat.com> > --- > drivers/vhost/vhost.c | 12 ++++-------- > 1 file changed, 4 insertions(+), 8 deletions(-) > > diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c > index 2ee2826..9ac66f7 100644 > --- a/drivers/vhost/vhost.c > +++ b/drivers/vhost/vhost.c > @@ -366,7 +366,6 @@ EXPORT_SYMBOL_GPL(vhost_dev_has_owner); > /* Caller should have device mutex */ > long vhost_dev_set_owner(struct vhost_dev *dev) > { > - struct task_struct *worker; > int err; > > /* Is there an owner already? */ > @@ -377,15 +376,12 @@ long vhost_dev_set_owner(struct vhost_dev *dev) > > /* No owner, become one */ > dev->mm = get_task_mm(current); > - worker = kthread_create(vhost_worker, dev, "vhost-%d", current->pid); > - if (IS_ERR(worker)) { > - err = PTR_ERR(worker); > + dev->worker = kthread_run(vhost_worker, dev, "vhost-%d", current->pid); > + if (IS_ERR(dev->worker)) { > + err = PTR_ERR(dev->worker); > goto err_worker; If you do it like this, dev->worker is not initialized when thread starts running. As thread itself might queue entries using vhost_work_queue, this seems wrong. > } > > - dev->worker = worker; > - wake_up_process(worker); /* avoid contributing to loadavg */ > - > err = vhost_attach_cgroups(dev); > if (err) > goto err_cgroup; > @@ -396,7 +392,7 @@ long vhost_dev_set_owner(struct vhost_dev *dev) > > return 0; > err_cgroup: > - kthread_stop(worker); > + kthread_stop(dev->worker); > dev->worker = NULL; > err_worker: > if (dev->mm) > -- > 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index 2ee2826..9ac66f7 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -366,7 +366,6 @@ EXPORT_SYMBOL_GPL(vhost_dev_has_owner); /* Caller should have device mutex */ long vhost_dev_set_owner(struct vhost_dev *dev) { - struct task_struct *worker; int err; /* Is there an owner already? */ @@ -377,15 +376,12 @@ long vhost_dev_set_owner(struct vhost_dev *dev) /* No owner, become one */ dev->mm = get_task_mm(current); - worker = kthread_create(vhost_worker, dev, "vhost-%d", current->pid); - if (IS_ERR(worker)) { - err = PTR_ERR(worker); + dev->worker = kthread_run(vhost_worker, dev, "vhost-%d", current->pid); + if (IS_ERR(dev->worker)) { + err = PTR_ERR(dev->worker); goto err_worker; } - dev->worker = worker; - wake_up_process(worker); /* avoid contributing to loadavg */ - err = vhost_attach_cgroups(dev); if (err) goto err_cgroup; @@ -396,7 +392,7 @@ long vhost_dev_set_owner(struct vhost_dev *dev) return 0; err_cgroup: - kthread_stop(worker); + kthread_stop(dev->worker); dev->worker = NULL; err_worker: if (dev->mm)
Code Cleanup, kthread_run is a convenient wrapper around kthread_create() that even wakes up the process for us. Use it and remove no longer needed temp task_struct variable. Signed-off-by: Bandan Das <bsd@redhat.com> --- drivers/vhost/vhost.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-)