vdev_buf_t
vb = kmem_alloc(sizeof (vdev_buf_t), KM_SLEEP);
vdev_buf_t *vb = (vdev_buf_t *)bp;
kmem_free(vb, sizeof (vdev_buf_t));
vdev_buf_t *vb;
vdev_buf_t *vb = (vdev_buf_t *)bp;
kmem_free(vb, sizeof (vdev_buf_t));
vdev_buf_t *vb;
vb = kmem_alloc(sizeof (vdev_buf_t), KM_SLEEP);