persistent_ram_write
persistent_ram_write(prz, hdr, len);
persistent_ram_write(cxt->cprz, record->buf, record->size);
persistent_ram_write(cxt->fprzs[zonenum], record->buf,
persistent_ram_write(prz, record->buf, size);
int persistent_ram_write(struct persistent_ram_zone *prz, const void *s,