id = bufb->buf_rsb.id;
sb_bindex = subbuffer_id_get_index(config, id);
rpages = bufb->array[sb_bindex];
CHAN_WARN_ON(chanb, config->mode == RING_BUFFER_OVERWRITE
&& subbuffer_id_is_noref(config, id));
memcpy(dest, rpages->p[index].virt + (offset & ~PAGE_MASK),
id = bufb->buf_rsb.id;
sb_bindex = subbuffer_id_get_index(config, id);
rpages = bufb->array[sb_bindex];
CHAN_WARN_ON(chanb, config->mode == RING_BUFFER_OVERWRITE
&& subbuffer_id_is_noref(config, id));
memcpy(dest, rpages->p[index].virt + (offset & ~PAGE_MASK),