15 	if (s->buf_size - buf->bytesused < copybytes)  in ivtv_buf_copy_from_user()
16 		copybytes = s->buf_size - buf->bytesused;  in ivtv_buf_copy_from_user()
17 	if (copy_from_user(buf->buf + buf->bytesused, src, copybytes)) {  in ivtv_buf_copy_from_user()
20 	buf->bytesused += copybytes;  in ivtv_buf_copy_from_user()
28 	for (i = 0; i < buf->bytesused; i += 4)  in ivtv_buf_swap()
37 	q->bytesused = 0;  in ivtv_queue_init()
46 		buf->bytesused = 0;  in ivtv_enqueue()
55 	q->bytesused += buf->bytesused - buf->readpos;  in ivtv_enqueue()
70 		q->bytesused -= buf->bytesused - buf->readpos;  in ivtv_dequeue()
84 	from->bytesused -= buf->bytesused - buf->readpos;  in ivtv_queue_move_buf()
87 		buf->bytesused = buf->readpos = buf->b_flags = buf->dma_xfer_cnt = 0;  in ivtv_queue_move_buf()
90 	to->bytesused += buf->bytesused - buf->readpos;  in ivtv_queue_move_buf()
125 	bytes_available = from_free ? from->length : from->bytesused;  in ivtv_queue_move()
145 			steal->bytesused -= buf->bytesused - buf->readpos;  in ivtv_queue_move()
146 			buf->bytesused = buf->readpos = buf->b_flags = buf->dma_xfer_cnt = 0;  in ivtv_queue_move()
163 		u32 old_bytesused = to->bytesused;  in ivtv_queue_move()
165 		while (to->bytesused - old_bytesused < needed_bytes) {  in ivtv_queue_move()