bucket_alloc
static uma_bucket_t bucket_alloc(uma_zone_t zone, void *, int);
bucket = bucket_alloc(zone, udata, M_NOWAIT | (flags & M_NOVM));
b = bucket_alloc(zone, udata, M_NOWAIT);
newbucket = bucket_alloc(zone, udata, M_NOWAIT);
newbucket = bucket_alloc(zone, udata, M_NOWAIT);