bool btrfs_subpage_end_and_test_writer(const struct btrfs_fs_info *fs_info,
				       struct folio *folio, u64 start, u32 len)
static bool btrfs_subpage_end_and_test_writer(const struct btrfs_fs_info *fs_info,
					      struct folio *folio, u64 start, u32 len)