> +enum { APPLE_RTKIT_PWR_STATE_OFF = 0x00, > + APPLE_RTKIT_PWR_STATE_SLEEP = 0x01, > + APPLE_RTKIT_PWR_STATE_GATED = 0x02, > + APPLE_RTKIT_PWR_STATE_QUIESCED = 0x10, > + APPLE_RTKIT_PWR_STATE_ON = 0x20, > +}; It would be great to get comments added explaining what these states are. It's not obvious how off/sleep/gated/quiesced differ, and it's not obvious from the code (doesn't look like GATED is used here at all?). Are these Apple names or r/e'd names or a mix? > + if (!rtk->syslog_buffer.size) { > + rtk_warn( > + "received syslog message but syslog_buffer.size is zero"); > + goto done; > + } > + if (!rtk->syslog_buffer.buffer && !rtk->syslog_buffer.iomem) { > + rtk_warn("received syslog message but no syslog_buffer.buffer or syslog_buffer.iomem"); > + goto done; > + } Nit: Wrapping is inconsistent between these two warns.