FS_DYNAMICPOSTBLFMT
if (fs->fs_postblformat != FS_DYNAMICPOSTBLFMT) {
nrpos = (((fsp)->fs_postblformat == FS_DYNAMICPOSTBLFMT) ?
sblock.fs_postblformat = FS_DYNAMICPOSTBLFMT;
if (sblock.fs_postblformat != FS_DYNAMICPOSTBLFMT) {
(((ufsvfsp)->vfs_fs->fs_postblformat != FS_DYNAMICPOSTBLFMT) \
(((fs)->fs_postblformat != FS_DYNAMICPOSTBLFMT) \
(((fs)->fs_postblformat != FS_DYNAMICPOSTBLFMT) \