10-current sheevaplug boot fails

[Ronald Klop]

Hi,

If I try a recent 10-current I get this panic:
## Starting application at 0x00900000 ...
KDB: debugger backends: ddb
KDB: current backend: ddb
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FreeBSD 10.0-CURRENT #1: Sun Jun 30 22:43:04 CEST 2013
     root at mailjail.klop.ws:/usr/obj/arm.arm/usr/src/sys/SHEEVAPLUG arm
FreeBSD clang version 3.3 (tags/RELEASE_33/final 183502) 20130610
WARNING: WITNESS option enabled, expect reduced performance.
WARNING: DIAGNOSTIC option enabled, expect reduced performance.
panic: lock "vm map (user)" 0xc0fca050 already initialized
KDB: enter: panic


It was also mentioned here:
http://freebsd.1045724.n5.nabble.com/A-booting-r251793-kernel-panics-on-RPi-td5820296.html
http://www.mail-archive.com/svn-src-head@freebsd.org/msg33905.html

The revert of r251709 (as mentioned in one of the e-mails above) gives a  
conflict with too many differences for me to fix.

But if I update to r251708 (one before the culprit) I get some LORs  
followed by this panic later in the boot proces:
usbus0: 480Mbps High Speed USB v2.0
Fatal kernel mode data abort: 'Alignment Fault 1'
trapframe: 0xde7f6c68
FSR=00000001, FAR=de7f6ce4, spsr=60000093
r0 =000306e7, r1 =ffffffff, r2 =0000001c, r3 =000306e7
r4 =de7f6cdc, r5 =de7f6ce4, r6 =c38b5960, r7 =c0cfa150
r8 =798ee230, r9 =00000015, r10=00000001, r11=de7f6cd4
r12=c0bea544, ssp=de7f6cb4, slr=c0c0afec, pc =c0a71cac

[ thread pid 14 tid 100028 ]
Stopped at      binuptime+0x70: und     0xe1c500d0


Is it currently possible to boot 10-CURRENT on a Sheevaplug?

NB: I'm booting from usb-stick.

Ronald.