Merge tag 'iomap-4.21-merge-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

}

EXPORT_SYMBOL_GPL(iomap_readpages);

/*

 * iomap_is_partially_uptodate checks whether blocks within a page are

 * uptodate or not.

 *

 * Returns true if all blocks which correspond to a file portion

 * we want to read within the page are uptodate.

 */

int

iomap_is_partially_uptodate(struct page *page, unsigned long from,

		unsigned long count)

{

	struct iomap_page *iop = to_iomap_page(page);

	struct inode *inode = page->mapping->host;

	unsigned first = from >> inode->i_blkbits;

	unsigned last = (from + count - 1) >> inode->i_blkbits;

	unsigned len, first, last;

	unsigned i;

	/* Limit range to one page */

	len = min_t(unsigned, PAGE_SIZE - from, count);

	/* First and last blocks in range within page */

	first = from >> inode->i_blkbits;

	last = (from + len - 1) >> inode->i_blkbits;

	if (iop) {

		for (i = first; i <= last; i++)

			if (!test_bit(i, iop->uptodate))