Alpha SMP panic

# cd /usr/src ; cvs -qR up -PdA
...
U sys/netgraph/bluetooth/include/ng_btsocket_hci_raw.h
U sys/netgraph/bluetooth/include/ng_btsocket_l2cap.h
U sys/netgraph/bluetooth/include/ng_btsocket_rfcomm.h
panic: Assertion td->td_turnstile != NULL failed at
../../../kern/subr_turnstile.c:427
cpuid = 1; 
panic
spin lock sched lock held by 0xfffffc001f053c80 for > 5 seconds