41 	rbuf->pwrite = 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()
119 	smp_store_release(&rbuf->pwrite, 0);  in dvb_ringbuffer_reset()
188 	split = (rbuf->pwrite + len > rbuf->size) ? rbuf->size - rbuf->pwrite : 0;  in dvb_ringbuffer_write()
191 		memcpy(rbuf->data+rbuf->pwrite, buf, split);  in dvb_ringbuffer_write()
199 		smp_store_release(&rbuf->pwrite, 0);  in dvb_ringbuffer_write()
201 	memcpy(rbuf->data+rbuf->pwrite, buf, todo);  in dvb_ringbuffer_write()
203 	smp_store_release(&rbuf->pwrite, (rbuf->pwrite + todo) % rbuf->size);  in dvb_ringbuffer_write()
215 	split = (rbuf->pwrite + len > rbuf->size) ? rbuf->size - rbuf->pwrite : 0;  in dvb_ringbuffer_write_user()
218 		status = copy_from_user(rbuf->data+rbuf->pwrite, buf, split);  in dvb_ringbuffer_write_user()
228 		smp_store_release(&rbuf->pwrite, 0);  in dvb_ringbuffer_write_user()
230 	status = copy_from_user(rbuf->data+rbuf->pwrite, buf, todo);  in dvb_ringbuffer_write_user()
234 	smp_store_release(&rbuf->pwrite, (rbuf->pwrite + todo) % rbuf->size);  in dvb_ringbuffer_write_user()
242 	ssize_t oldpwrite = rbuf->pwrite;  in dvb_ringbuffer_pkt_write()
250 		rbuf->pwrite = oldpwrite;  in dvb_ringbuffer_pkt_write()