hugetlbfs: use pagevec_lookup_range() in remove_inode_hugepages()

	struct pagevec pvec;

	pgoff_t next, index;

	int i, freed = 0;

	long lookup_nr = PAGEVEC_SIZE;

	bool truncate_op = (lend == LLONG_MAX);

	memset(&pseudo_vma, 0, sizeof(struct vm_area_struct));

	pagevec_init(&pvec, 0);

	next = start;

	while (next < end) {

		/*

		 * Don't grab more pages than the number left in the range.

		 */

		if (end - next < lookup_nr)

			lookup_nr = end - next;

		/*

		 * When no more pages are found, we are done.

		 */

		if (!pagevec_lookup(&pvec, mapping, &next, lookup_nr))

		if (!pagevec_lookup_range(&pvec, mapping, &next, end - 1,

					  PAGEVEC_SIZE))

			break;

		for (i = 0; i < pagevec_count(&pvec); ++i) {

			struct page *page = pvec.pages[i];

			u32 hash;

			/*

			 * The page (index) could be beyond end.  This is

			 * only possible in the punch hole case as end is

			 * max page offset in the truncate case.

			 */

			index = page->index;

			if (index >= end)

				break;

			hash = hugetlb_fault_mutex_hash(h, current->mm,

							&pseudo_vma,

							mapping, index, 0);