229 	const int nbits = len >> fs_info->sectorsize_bits;  in btrfs_subpage_start_reader()  local
240 	ASSERT(bitmap_test_range_all_zero(subpage->bitmaps, start_bit, nbits));  in btrfs_subpage_start_reader()
241 	bitmap_set(subpage->bitmaps, start_bit, nbits);  in btrfs_subpage_start_reader()
242 	atomic_add(nbits, &subpage->readers);  in btrfs_subpage_start_reader()
251 	const int nbits = len >> fs_info->sectorsize_bits;  in btrfs_subpage_end_reader()  local
262 	ASSERT(bitmap_test_range_all_set(subpage->bitmaps, start_bit, nbits));  in btrfs_subpage_end_reader()
263 	ASSERT(atomic_read(&subpage->readers) >= nbits);  in btrfs_subpage_end_reader()
265 	bitmap_clear(subpage->bitmaps, start_bit, nbits);  in btrfs_subpage_end_reader()
266 	last = atomic_sub_and_test(nbits, &subpage->readers);  in btrfs_subpage_end_reader()
303 	const int nbits = (len >> fs_info->sectorsize_bits);  in btrfs_subpage_start_writer()  local
311 	ASSERT(bitmap_test_range_all_zero(subpage->bitmaps, start_bit, nbits));  in btrfs_subpage_start_writer()
312 	bitmap_set(subpage->bitmaps, start_bit, nbits);  in btrfs_subpage_start_writer()
313 	ret = atomic_add_return(nbits, &subpage->writers);  in btrfs_subpage_start_writer()
314 	ASSERT(ret == nbits);  in btrfs_subpage_start_writer()
323 	const int nbits = (len >> fs_info->sectorsize_bits);  in btrfs_subpage_end_and_test_writer()  local
344 	for_each_set_bit_from(bit, subpage->bitmaps, start_bit + nbits) {  in btrfs_subpage_end_and_test_writer()
752 	unsigned int nbits;  in btrfs_folio_assert_not_dirty()  local
764 	nbits = len >> fs_info->sectorsize_bits;  in btrfs_folio_assert_not_dirty()
768 	ASSERT(bitmap_test_range_all_zero(subpage->bitmaps, start_bit, nbits));  in btrfs_folio_assert_not_dirty()
785 	unsigned int nbits;  in btrfs_folio_set_writer_lock()  local
794 	nbits = len >> fs_info->sectorsize_bits;  in btrfs_folio_set_writer_lock()
797 	ASSERT(bitmap_test_range_all_zero(subpage->bitmaps, start_bit, nbits));  in btrfs_folio_set_writer_lock()
798 	bitmap_set(subpage->bitmaps, start_bit, nbits);  in btrfs_folio_set_writer_lock()
799 	ret = atomic_add_return(nbits, &subpage->writers);  in btrfs_folio_set_writer_lock()