scan_leb_used_cmp
RB_PROTOTYPE(scan_leb_used_rbtree, chfs_scan_leb, u.rb, scan_leb_used_cmp);
RB_GENERATE(scan_leb_used_rbtree, chfs_scan_leb, u.rb, scan_leb_used_cmp);
int scan_leb_used_cmp(struct chfs_scan_leb *sleb1, struct chfs_scan_leb *sleb2);