kernel/bpf/ringbuf.c

317 	unsigned long cons_pos, prod_pos, over_pos;
323 		prod_pos = smp_load_acquire(&rb->producer_pos);
324 		return prod_pos - max(cons_pos, over_pos);
326 		prod_pos = smp_load_acquire(&rb->producer_pos);
327 		return prod_pos - cons_pos;
465 	unsigned long cons_pos, prod_pos, new_prod_pos, pend_pos, over_pos, flags;
482 	prod_pos = rb->producer_pos;
483 	new_prod_pos = prod_pos + len;
485 	while (pend_pos < prod_pos) {
527 	hdr = (void *)rb->data + (prod_pos & rb->mask);
752 	u64 cons_pos, prod_pos;
755 	prod_pos = smp_load_acquire(&rb->producer_pos);
756 	if (prod_pos % 8)
761 	if (cons_pos >= prod_pos)
772 	if (total_len > prod_pos - cons_pos)