NSPB
i * afs.fs_spc / NSPB(&afs));
howmany(fs->fs_cpg * fs->fs_spc / NSPB(fs), NBBY);
e=howmany(sb->fs_cpg * sb->fs_spc / NSPB(sb), NBBY);
(sblock.fs_cpg * sblock.fs_spc / NSPB(&sblock), NBBY);
for (sblock.fs_cpc = NSPB(&sblock), i = sblock.fs_spc;
if ((sblock.fs_cpg * sblock.fs_spc) % NSPB(&sblock) != 0) {
rotblsize = sblock.fs_cpc * sblock.fs_spc / NSPB(&sblock);
sblock.fs_nsect > (1 << NBBY) * NSPB(&sblock)) {
(sblock.fs_cpg * sblock.fs_spc / NSPB(&sblock), NBBY);
bno = (cylno - pos) * fs->fs_spc / NSPB(fs);
/* cluster map */ howmany((fs)->fs_cpg * (fs)->fs_spc / NSPB(fs), NBBY)))