263 static int queue_get(struct ring_buffer *rb, void **mem_block, size_t *size)  in queue_get()  argument
269 	if (rb->tail == rb->head) {  in queue_get()
274 	*mem_block = rb->buf[rb->tail].mem_block;  in queue_get()
275 	*size = rb->buf[rb->tail].size;  in queue_get()
276 	MODULO_INC(rb->tail, rb->len);  in queue_get()
285 static int queue_put(struct ring_buffer *rb, void *mem_block, size_t size)  in queue_put()  argument
292 	head_next = rb->head;  in queue_put()
293 	MODULO_INC(head_next, rb->len);  in queue_put()
295 	if (head_next == rb->tail) {  in queue_put()
301 	rb->buf[rb->head].mem_block = mem_block;  in queue_put()
302 	rb->buf[rb->head].size = size;  in queue_put()
303 	rb->head = head_next;  in queue_put()