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linux-sg2042
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Merge branch 'vhost-net' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

This commit is contained in:
David S. Miller 2011-01-14 12:41:47 -08:00
parent 92d76e81b9 0174b0c30a
commit b7e2041e2a
1 changed files with 11 additions and 7 deletions
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18
drivers/vhost/vhost.c
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@ -97,22 +97,26 @@ void vhost_poll_stop(struct vhost_poll *poll)
remove_wait_queue(poll->wqh, &poll->wait); remove_wait_queue(poll->wqh, &poll->wait);
} }
static bool vhost_work_seq_done(struct vhost_dev *dev, struct vhost_work *work,
unsigned seq)
{
int left;
spin_lock_irq(&dev->work_lock);
left = seq - work->done_seq;
spin_unlock_irq(&dev->work_lock);
return left <= 0;
}
static void vhost_work_flush(struct vhost_dev *dev, struct vhost_work *work) static void vhost_work_flush(struct vhost_dev *dev, struct vhost_work *work)
{ {
unsigned seq; unsigned seq;
int left;
int flushing; int flushing;
spin_lock_irq(&dev->work_lock); spin_lock_irq(&dev->work_lock);
seq = work->queue_seq; seq = work->queue_seq;
work->flushing++; work->flushing++;
spin_unlock_irq(&dev->work_lock); spin_unlock_irq(&dev->work_lock);
wait_event(work->done, ({ wait_event(work->done, vhost_work_seq_done(dev, work, seq));
spin_lock_irq(&dev->work_lock);
left = seq - work->done_seq <= 0;
spin_unlock_irq(&dev->work_lock);
left;
}));
spin_lock_irq(&dev->work_lock); spin_lock_irq(&dev->work_lock);
flushing = --work->flushing; flushing = --work->flushing;
spin_unlock_irq(&dev->work_lock); spin_unlock_irq(&dev->work_lock);