rpcif_dirmap_read
EXPORT_SYMBOL(rpcif_dirmap_read);
rpcif_dirmap_read(hyperbus->rpc.dev, from, len, to);
return rpcif_dirmap_read(rpc->dev, offs, len, buf);
ssize_t rpcif_dirmap_read(struct device *dev, u64 offs, size_t len, void *buf);