vhost: copy_to_user -> __copy_to_user

We do access_ok checks at setup time, so we don't need to
redo them on each access.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index c17c881e235ac12c9d6c042dafbd1fc32bce3149..e6a093187a0e9036b52c1085ba9fc32de9703970 100644 (file)
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -1258,7 +1258,7 @@ static int __vhost_add_used_n(struct vhost_virtqueue *vq,
 
        start = vq->last_used_idx % vq->num;
        used = vq->used->ring + start;
-       if (copy_to_user(used, heads, count * sizeof *used)) {
+       if (__copy_to_user(used, heads, count * sizeof *used)) {
                vq_err(vq, "Failed to write used");
                return -EFAULT;
        }