PR 252541: Early kernel panic on RPi4B (Too many early devmatch mappings)

[Klaus Küchemann]

> Am 12.01.2021 um 02:08 schrieb Klaus Küchemann <maciphone2 at googlemail.com>:
> 
> 
> 
>> Am 11.01.2021 um 21:47 schrieb Gordon Bergling <gbe at freebsd.org>:
>> https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=252541
>> Gordon Bergling <committer.png> 2021-01-10 11:18:34 UTC
>> This panic happens on GENERIC and on GENERIC-MMCCAM.
> 
> 
> default sys/arm64/conf/GENERIC :
> 
> 1a816c75600335c4482070df055add6f96885d54 refs/heads/main
> 
> — no problems on 8GB-model :----
> 
> root@:/ # uname -a
> FreeBSD  13.0-CURRENT FreeBSD 13.0-CURRENT #8 main-c255871-g1a816c75600: Tue Jan 12 01:05:32 UTC 2021     root at generic:/usr/obj/usr/src/arm64.aarch64/sys/GENERIC  arm64
> 
> ——
> With the same boot-device on the 4GB-model I had to manually unload/load kernel from loader-prompt, then boots normally into GENERIC .
> 
> Regards
> 
> K.
> 
> 

… forgot to say :(same boot device/GENERIC) while the machine  boots normal boot on 8GB-model, on the 4GB-model not only I had to  load kernel manually but also 
had to boot with next step : mountroot> ufs:/ufs/rootfs, then the machine boots up normal.