xfs_valid_startblock
if (WARN_ON_ONCE(!xfs_valid_startblock(bma->ip, bma->blkno))) {
if (unlikely(!xfs_valid_startblock(ip, imap->br_startblock))) {
if (unlikely(!xfs_valid_startblock(ip, imap->br_startblock))) {
if (unlikely(!xfs_valid_startblock(ip, imap.br_startblock))) {