Re: [virtio-dev] [PATCH v4 1/6] virtio-vsock vhost device: fixed endiannes issue

and even if you make vhost_init_is_le() extern, this won't work if the device
is in legacy mode, and the host and guest have different endianness.

This is because vhost_init_is_le() computes vq->is_le as follows when we
have CONFIG_VHOST_CROSS_ENDIAN_LEGACY=y:

vq->is_le = vhost_has_feature(vq, VIRTIO_F_VERSION_1) || !vq->user_be;

and vq->user_be comes from the VHOST_SET_VRING_ENDIAN ioctl.