56 	unsigned	head;	/* Written to by userland or under ring_lock  member
525 	ring->head = ring->tail = 0;  in aio_setup_ring()
597 static void free_ioctx_rcufn(struct rcu_head *head)  in free_ioctx_rcufn()  argument
599 	struct kioctx *ctx = container_of(head, struct kioctx, free_rcu);  in free_ioctx_rcufn()
959 static void refill_reqs_available(struct kioctx *ctx, unsigned head,  in refill_reqs_available()  argument
965 	head %= ctx->nr_events;  in refill_reqs_available()
966 	if (head <= tail)  in refill_reqs_available()
967 		events_in_ring = tail - head;  in refill_reqs_available()
969 		events_in_ring = ctx->nr_events - (head - tail);  in refill_reqs_available()
993 		unsigned head;  in user_refill_reqs_available()  local
1005 		head = ring->head;  in user_refill_reqs_available()
1008 		refill_reqs_available(ctx, head, ctx->tail);  in user_refill_reqs_available()
1087 	unsigned tail, pos, head;  in aio_complete()  local
1143 	head = ring->head;  in aio_complete()
1150 		refill_reqs_available(ctx, head, tail);  in aio_complete()
1188 	unsigned head, tail, pos;  in aio_read_events_ring()  local
1203 	head = ring->head;  in aio_read_events_ring()
1213 	pr_debug("h%u t%u m%u\n", head, tail, ctx->nr_events);  in aio_read_events_ring()
1215 	if (head == tail)  in aio_read_events_ring()
1218 	head %= ctx->nr_events;  in aio_read_events_ring()
1226 		avail = (head <= tail ?  tail : ctx->nr_events) - head;  in aio_read_events_ring()
1227 		if (head == tail)  in aio_read_events_ring()
1232 			    ((head + AIO_EVENTS_OFFSET) % AIO_EVENTS_PER_PAGE));  in aio_read_events_ring()
1234 		pos = head + AIO_EVENTS_OFFSET;  in aio_read_events_ring()
1249 		head += avail;  in aio_read_events_ring()
1250 		head %= ctx->nr_events;  in aio_read_events_ring()
1254 	ring->head = head;  in aio_read_events_ring()
1258 	pr_debug("%li  h%u t%u\n", ret, head, tail);  in aio_read_events_ring()