XFS_BMAP_UNMAP
__xfs_bmap_add(tp, XFS_BMAP_UNMAP, ip, whichfork, PREV);
case XFS_BMAP_UNMAP:
{ XFS_BMAP_UNMAP, "unmap" }
case XFS_BMAP_UNMAP:
ASSERT(bi->bi_type == XFS_BMAP_UNMAP);
case XFS_BMAP_UNMAP:
TRACE_DEFINE_ENUM(XFS_BMAP_UNMAP);