xfs_iext_first
xfs_iext_first(ifp, &icur);
xfs_iext_first(ifp, &ir.icur);
xfs_iext_first(ifp, &icur);
xfs_iext_first(ifp, cur);
xfs_iext_first(ifp, &icur);
void xfs_iext_first(struct xfs_ifork *, struct xfs_iext_cursor *);
for (xfs_iext_first((ifp), (ext)); \
xfs_iext_first(ifp, &icur);