iov_iter_xarray
iov_iter_xarray(&io->iter, ITER_DEST, &folio->mapping->i_pages,
iov_iter_xarray(&iter, ITER_DEST, &mapping->i_pages, pos, PAGE_SIZE);
iov_iter_xarray(&iter, ITER_DEST, &mapping->i_pages, pos, count);
iov_iter_xarray(&io->iter, ITER_DEST, &mapping->i_pages, pos, count);
iov_iter_xarray(&iter, ITER_SOURCE, &mapping->i_pages, start, len);
iov_iter_xarray(&iter, ITER_DEST, i_pages, offset, readahead_length(rac));
void iov_iter_xarray(struct iov_iter *i, unsigned int direction, struct xarray *xarray,
EXPORT_SYMBOL(iov_iter_xarray);
iov_iter_xarray(iter, dir, xarray, 0, size);
iov_iter_xarray(&iter, READ, xarray, pr->from, size);
iov_iter_xarray(&iter, WRITE, xarray, pr->from, size);
iov_iter_xarray(&iter, WRITE, xarray, from, size);