port-sparc/54845: sparc panics in sleepq_remove

[gson%gson.org@localhost (Andreas Gustafsson)]

>Number:         54845
>Category:       port-sparc
>Synopsis:       sparc panics in sleepq_remove
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-sparc-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jan 08 14:35:00 +0000 2020
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current
>Organization:

>Environment:
System: NetBSD
Architecture: sparc
Machine: sparc
>Description:

The last few sparc test runs on the TNF testbed have paniced with:

  panic: TAILQ_PREREMOVE head 0xf0002008 elm 0xf074c040 /tmp/bracket/build/2020.01.06.01.37.57-sparc/src/sys/kern/kern_sleepq.c:117

For example:

  http://releng.netbsd.org/b5reports/sparc/2020/2020.01.06.01.37.57/test.log
  http://releng.netbsd.org/b5reports/sparc/2020/2020.01.06.21.03.24/test.log
  http://releng.netbsd.org/b5reports/sparc/2020/2020.01.07.10.20.07/test.log

>How-To-Repeat:

>Fix: