__do_read
if (__do_read(ff, buf, sz))
ret = __do_read(ff, addr, sizeof(*addr));
ret = __do_read(ff, addr, sizeof(*addr));
if (!__do_read(ff, buf, len)) {
if (__do_read(ff, &info_linear->info, info_len))
if (__do_read(ff, info_linear->data, data_len))
if (__do_read(ff, node->data, data_size))
r = __do_read(input_fd, data, size);