rpcif_prepare
EXPORT_SYMBOL(rpcif_prepare);
rpcif_prepare(rpc->dev, &op, NULL, NULL);
rpcif_prepare(rpc->dev, &op, NULL, NULL);
rpcif_prepare(rpc->dev, &rpc_op, offs, len);
void rpcif_prepare(struct device *dev, const struct rpcif_op *op, u64 *offs,