37 	int consumer_head ____cacheline_aligned_in_smp; /* next valid entry */
176 		return READ_ONCE(r->queue[r->consumer_head]);  in __ptr_ring_peek()
201 		return !r->queue[READ_ONCE(r->consumer_head)];  in __ptr_ring_empty()
268 	int consumer_head = r->consumer_head;  in __ptr_ring_discard_one()  local
269 	int head = consumer_head++;  in __ptr_ring_discard_one()
276 	if (unlikely(consumer_head - r->consumer_tail >= r->batch ||  in __ptr_ring_discard_one()
277 		     consumer_head >= r->size)) {  in __ptr_ring_discard_one()
285 		r->consumer_tail = consumer_head;  in __ptr_ring_discard_one()
287 	if (unlikely(consumer_head >= r->size)) {  in __ptr_ring_discard_one()
288 		consumer_head = 0;  in __ptr_ring_discard_one()
292 	WRITE_ONCE(r->consumer_head, consumer_head);  in __ptr_ring_discard_one()
498 	r->producer = r->consumer_head = r->consumer_tail = 0;  in ptr_ring_init()
531 	head = r->consumer_head - 1;  in ptr_ring_unconsume()
534 	r->consumer_tail = r->consumer_head;  in ptr_ring_unconsume()
541 		head = r->consumer_head - 1;  in ptr_ring_unconsume()
551 		WRITE_ONCE(r->consumer_head, head);  in ptr_ring_unconsume()
578 	r->consumer_head = 0;  in __ptr_ring_swap_queue()