ufs_free_fragments
ufs_free_fragments (inode, result + newcount, request - newcount);
ufs_free_fragments (inode, tmp, oldcount);
ufs_free_fragments(inode, tmp + new_tail, old_tail - new_tail);
ufs_free_fragments(inode, tmp + new_tail,
ufs_free_fragments(inode, tmp, old_tail);
void ufs_free_fragments (struct inode *, u64 fragment, unsigned count);