atomic_sub_int_nv
((unsigned long)atomic_sub_int_nv((unsigned int *)p, (unsigned int)v))
if (atomic_sub_int_nv(&sc->sc_txfree, txused) == 0)
txcnt = atomic_sub_int_nv(&sc->bge_txcnt, freed);
used = atomic_sub_int_nv(&sc->used_tx_bd, freed);
used = atomic_sub_int_nv(&sc->sc_tx_cnt, freed);
if (atomic_sub_int_nv(&ccb->ccb_refcnt, refs) == 0)
#ifndef atomic_sub_int_nv
#define atomic_sub_int(_p, _v) ((void)atomic_sub_int_nv((_p), (_v)))
#define atomic_dec_int_nv(_p) atomic_sub_int_nv((_p), 1)