pdata.dump_oops = dump_oops;

+       /* If "max_reason" is set, its value has priority over "dump_oops". */
+       if (ramoops_max_reason != -1)
+               pdata.max_reason = ramoops_max_reason;

 (ramoops_max_reason >= 0) might make more sense here, we do not want
negative max_reason even if it was provided by the user.

Otherwise the series looks good.

Thank you,
Pasha