Symbol: ffs_blkfree
sys/ufs/ffs/ffs_alloc.c
1733
ffs_blkfree(struct fs *fs, struct vnode *devvp, daddr_t bno, long size,
usr.sbin/makefs/ffs/ffs_alloc.c
441
ffs_blkfree(struct inode *ip, daddr_t bno, long size)