fs_old_cgmask
fs->fs_old_cgmask = 0xffffffff;
fs->fs_old_cgmask <<= 1;
fs->fs_old_cgmask <<= 1;
sblock.fs_old_cgmask = 0xffffffff;
fsi_ffs.old_cgmask = buf.sblk.fs_old_cgmask;
fsi_ffs.old_cgmask = buf.sblk.fs_old_cgmask;
int32_t fs_old_cgmask; /* used to calc mod fs_ntrak */
(cgbase(fs, c) + (fs)->fs_old_cgoffset * ((c) & ~((fs)->fs_old_cgmask)))
fs->fs_old_cgoffset, fs->fs_old_cgmask);
sblock.fs_old_cgmask = 0xffffffff;