clrbit
#define clrbmap(blkno) clrbit(blockmap, blkno)
#define clrbmap(blkno) clrbit(blockmap, blkno)
clrbit(cg_inosused(cgp, 0), ino % sblock->fs_ipg);
clrbit(quotamap[blk], qidx);
clrbit(cg_blksfree(cgp, 0), baseblk + k);
#define clrbmap(blkno) clrbit(blockmap, blkno)
clrbit(cg_clustersfree(&acg, 0), blkno);
clrbit(sparse_dump_physmap, p);
clrbit(sparse_dump_physmap, p/PAGE_SIZE);
clrbit(sc->sc_keymap, keyix);
clrbit(sc->sc_keymap, keyix+64); /* TX key MIC */
clrbit(sc->sc_keymap, keyix+32);
clrbit(sc->sc_keymap, keyix+32+64);
clrbit(&p->adapter->open_device_map, p->port_id);
clrbit(sc->sc_sessions, session);
clrbit(pm->disk_boot->bits, i);
clrbit(ud->keys, i);
clrbit(pmnt->pmnt_bitmap, pty);
clrbit(clp->c_cq, i);
clrbit(ieee80211_vapmap, ic->ic_vap);
clrbit(ic->ic_tim_bitmap, aid);
clrbit(ic->ic_chan_scan, ieee80211_chan2ieee(ic, chan));
clrbit(bbp, bno);
clrbit(ibp, ino);
clrbit(blksfree, bno + i);
clrbit(blksfree, bno + i);
clrbit(blksfree, cgbno + i);
clrbit(inosused, cgino);
clrbit(freemapp, blkno);
clrbit((fs)->fs_active, (cg)); \
clrbit(cg_blksfree(cgp, needswap), bno + i);