void ion_unmap_kernel(struct ion_client *client, struct ion_handle *handle)
{
	struct ion_buffer *buffer;

	mutex_lock(&client->lock);
	buffer = handle->buffer;
	mutex_lock(&buffer->lock);
	ion_handle_kmap_put(handle);
	mutex_unlock(&buffer->lock);
	mutex_unlock(&client->lock);
}
void ion_unmap_kernel(struct ion_client *client, struct ion_handle *handle)
{
	struct ion_buffer *buffer;

	mutex_lock(&client->lock);
	buffer = handle->buffer;
	mutex_lock(&buffer->lock);
	ion_handle_kmap_put(handle);
	mutex_unlock(&buffer->lock);
	mutex_unlock(&client->lock);
}