filemap_read
ret = filemap_read(iocb, to, ret);
ret = filemap_read(iocb, iter, 0);
return filemap_read(iocb, to, ret);
return filemap_read(iocb, to, 0);
nread = filemap_read(&dedup_iocb, to, 0);
ret = filemap_read(iocb, to, 0);
ret = filemap_read(iocb, iter, 0);
rc = filemap_read(iocb, to, 0);
ssize_t filemap_read(struct kiocb *iocb, struct iov_iter *to,
EXPORT_SYMBOL_GPL(filemap_read);
return filemap_read(iocb, iter, retval);