port-hpcmips/43738: [mips64 merge problem] NetBSD/hpcmips can't login after Dec.2009

[jun%NetBSD.org@localhost]

>Number:         43738
>Category:       port-hpcmips
>Synopsis:       [mips64 merge problem] NetBSD/hpcmips can't login after 
>Dec.2009
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-hpcmips-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Aug 10 18:45:00 +0000 2010
>Originator:     Jun Ebihara
>Release:        NetBSD 5.99.22 (Nov 30 20:51:38 2009113000000Z)
>Organization:
        SOUM Corporation
>Environment:
System: NetBSD narn.netbsd.org 4.0_STABLE NetBSD 4.0_STABLE (NBMAIL) #5: Fri 
Jul 3 22:41:25 UTC 2009 root@ADMIN:/usr/obj/sys/arch/i386/compile.i386/NBMAIL 
i386
Architecture: i386
Machine: i386
>Description:
NetBSD/hpcmips can't login with userland after Dec.2009.

Login OK:
kernel   version (5.99.38)
userland version (5.99.22)
NetBSD/hpcmips 5.99.22 (200911300000Z)
ftp://ftp.jp.netbsd.org/pub/NetBSD-daily/HEAD/200911300000Z/hpcmips

Login Fail:
kernel   version (5.99.38)
userland version (5.99.23-38)
NetBSD/hpcmips 5.99.23 (200912310000Z) or lator.
ftp://ftp.jp.netbsd.org/pub/NetBSD-daily/HEAD/200912310000Z/hpcmips/

... boot message

NetBSD/hpcmips (Amnesiac) (ttyE0)

Jul 23 22:21:59 init: getty repeating too quickly on port '/dev/ttyE0', sleeping


NetBSD/hpcmips (Amnesiac) (ttyE0)
   :
repeating and can't login

>How-To-Repeat:

- download hpcmips kernel newer then 20100622
cf.
ftp://ftp.jp.netbsd.org/pub/NetBSD-daily/HEAD/201008070000Z/hpcmips/binary/kernel/netbsd-GENERIC.gz

- install userland
-- ftp://ftp.jp.netbsd.org/pub/NetBSD-daily/HEAD/200911300000Z/hpcmips
-- ftp://ftp.jp.netbsd.org/pub/NetBSD-daily/HEAD/200912310000Z/hpcmips

- boot NetBSD/hpcmips machine.
-- ftp://ftp.jp.netbsd.org/pub/NetBSD-daily/HEAD/200911300000Z/hpcmips
   ==> Login OK.
-- ftp://ftp.jp.netbsd.org/pub/NetBSD-daily/HEAD/200912310000Z/hpcmips
   ==> Login FAIL.

- if you don't have hpcmips machine, install pkgsrc/emulators/gxemul 
and run
# gxemul -e mobilepro770 -X -M 50 kernel/netbsd20100807

>Fix: