40 	rbuf->pread = 0;  in dvb_ringbuffer_init()
61 	return (rbuf->pread == smp_load_acquire(&rbuf->pwrite));  in dvb_ringbuffer_empty()
75 	free = READ_ONCE(rbuf->pread) - rbuf->pwrite;  in dvb_ringbuffer_free()
91 	avail = smp_load_acquire(&rbuf->pwrite) - rbuf->pread;  in dvb_ringbuffer_avail()
107 	smp_store_release(&rbuf->pread, smp_load_acquire(&rbuf->pwrite));  in dvb_ringbuffer_flush()
117 	smp_store_release(&rbuf->pread, 0);  in dvb_ringbuffer_reset()
139 	split = (rbuf->pread + len > rbuf->size) ? rbuf->size - rbuf->pread : 0;  in dvb_ringbuffer_read_user()
141 		if (copy_to_user(buf, rbuf->data+rbuf->pread, split))  in dvb_ringbuffer_read_user()
149 		smp_store_release(&rbuf->pread, 0);  in dvb_ringbuffer_read_user()
151 	if (copy_to_user(buf, rbuf->data+rbuf->pread, todo))  in dvb_ringbuffer_read_user()
155 	smp_store_release(&rbuf->pread, (rbuf->pread + todo) % rbuf->size);  in dvb_ringbuffer_read_user()
165 	split = (rbuf->pread + len > rbuf->size) ? rbuf->size - rbuf->pread : 0;  in dvb_ringbuffer_read()
167 		memcpy(buf, rbuf->data+rbuf->pread, split);  in dvb_ringbuffer_read()
174 		smp_store_release(&rbuf->pread, 0);  in dvb_ringbuffer_read()
176 	memcpy(buf, rbuf->data+rbuf->pread, todo);  in dvb_ringbuffer_read()
179 	smp_store_release(&rbuf->pread, (rbuf->pread + todo) % rbuf->size);  in dvb_ringbuffer_read()
337 		idx = rbuf->pread;  in dvb_ringbuffer_pkt_next()
344 	consumed = (idx - rbuf->pread);  in dvb_ringbuffer_pkt_next()