40 	rbuf->pread=rbuf->pwrite=0;  in dvb_ringbuffer_init()
60 	return (rbuf->pread == smp_load_acquire(&rbuf->pwrite));  in dvb_ringbuffer_empty()
74 	free = READ_ONCE(rbuf->pread) - rbuf->pwrite;  in dvb_ringbuffer_free()
90 	avail = smp_load_acquire(&rbuf->pwrite) - rbuf->pread;  in dvb_ringbuffer_avail()
106 	smp_store_release(&rbuf->pread, smp_load_acquire(&rbuf->pwrite));  in dvb_ringbuffer_flush()
118 	smp_store_release(&rbuf->pwrite, 0);  in dvb_ringbuffer_reset()
187 	split = (rbuf->pwrite + len > rbuf->size) ? rbuf->size - rbuf->pwrite : 0;  in dvb_ringbuffer_write()
190 		memcpy(rbuf->data+rbuf->pwrite, buf, split);  in dvb_ringbuffer_write()
198 		smp_store_release(&rbuf->pwrite, 0);  in dvb_ringbuffer_write()
200 	memcpy(rbuf->data+rbuf->pwrite, buf, todo);  in dvb_ringbuffer_write()
202 	smp_store_release(&rbuf->pwrite, (rbuf->pwrite + todo) % rbuf->size);  in dvb_ringbuffer_write()
214 	split = (rbuf->pwrite + len > rbuf->size) ? rbuf->size - rbuf->pwrite : 0;  in dvb_ringbuffer_write_user()
217 		status = copy_from_user(rbuf->data+rbuf->pwrite, buf, split);  in dvb_ringbuffer_write_user()
227 		smp_store_release(&rbuf->pwrite, 0);  in dvb_ringbuffer_write_user()
229 	status = copy_from_user(rbuf->data+rbuf->pwrite, buf, todo);  in dvb_ringbuffer_write_user()
233 	smp_store_release(&rbuf->pwrite, (rbuf->pwrite + todo) % rbuf->size);  in dvb_ringbuffer_write_user()
241 	ssize_t oldpwrite = rbuf->pwrite;  in dvb_ringbuffer_pkt_write()
248 	if (status < 0) rbuf->pwrite = oldpwrite;  in dvb_ringbuffer_pkt_write()