RINGBUF_TYPE_DATA_TYPE_LEN_MAX
#define RB_MAX_SMALL_DATA (RB_ALIGNMENT * RINGBUF_TYPE_DATA_TYPE_LEN_MAX)
#define RINGBUF_TYPE_DATA 0 ... RINGBUF_TYPE_DATA_TYPE_LEN_MAX
if (event->type_len > RINGBUF_TYPE_DATA_TYPE_LEN_MAX)
WARN_ON_ONCE(event->type_len > RINGBUF_TYPE_DATA_TYPE_LEN_MAX);
if (event->type_len <= RINGBUF_TYPE_DATA_TYPE_LEN_MAX)
RINGBUF_TYPE_DATA_TYPE_LEN_MAX);