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Merge branch 'net-2.6' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

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David S. Miller 2010-05-14 03:42:49 -07:00
commit d77f873fdd
1 changed files with 6 additions and 1 deletions
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7
drivers/vhost/vhost.c
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@ -1035,7 +1035,12 @@ int vhost_add_used(struct vhost_virtqueue *vq, unsigned int head, int len)
/* This actually signals the guest, using eventfd. */
void vhost_signal(struct vhost_dev *dev, struct vhost_virtqueue *vq)
{
__u16 flags = 0;
__u16 flags;
/* Flush out used index updates. This is paired
* with the barrier that the Guest executes when enabling
* interrupts. */
smp_mb();
if (get_user(flags, &vq->avail->flags)) {
vq_err(vq, "Failed to get flags");
return;