ffs_blkfree
ffs_blkfree(ip, bprev, (long)osize);
ffs_blkfree(ip, bno + numfrags(fs, nsize),
ffs_blkfree(ip, *blkp, fs->fs_bsize);
ffs_blkfree(ip, *blkp, fs->fs_bsize);
void ffs_blkfree(struct inode *, daddr_t, long);
ffs_blkfree(oip, bn, fs->fs_bsize);
ffs_blkfree(oip, bn, bsize);
ffs_blkfree(oip, bn, oldspace - newspace);
ffs_blkfree(ip, nb, fs->fs_bsize);