kern/55606: t_lock test kills armv4 machines

[martin%NetBSD.org@localhost]

>Number:         55606
>Category:       kern
>Synopsis:       t_lock test kills armv4 machines
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Aug 25 13:40:00 +0000 2020
>Originator:     Martin Husemann
>Release:        NetBSD 9.99.71
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD drowsy.duskware.de 9.99.71 NetBSD 9.99.71 (GENERIC) #0: Mon Aug 24 19:50:02 CEST 2020 martin%martins.aprisoft.de@localhost:/usr/src/sys/arch/shark/compile/GENERIC shark
Architecture: earmv4
Machine: shark
>Description:

Trying to run atf tests a shark locks up instantly in the kernel/t_lock
test. Console is dead, test can't be interrupted. ddb still works.

>How-To-Repeat:
as root: cd /usr/tests/kernel && atf-run t_lock

Lockup is instantly.

>Fix:
n/a