atomic64_dec_if_positive
return __lse_ll_sc_body(atomic64_dec_if_positive, v);
atomic64_dec_if_positive(&esw->user_count);
atomic64_dec_if_positive(&entry->num);
atomic64_dec_if_positive(&entry->num);
BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
BUG_ON(atomic64_dec_if_positive(&v) != -one);
BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
return atomic64_dec_if_positive(v);