With my -current setup (as of the night before last) when I
say "make" in /usr/src/distrib/i386/floppies, I get a kernel
panic upon the execution of "sh MAKEDEV floppy"; the message
is "panic: locking against myself" and it occurs in:
ufs_lock+0x62, from
vndstrategy+0x14, from
spec_strategy, from
ufs_strategy, from
bwrite, from
vn_bwrite, from
bawrite, from
getnewbuf, from 
getblk, from
ufs_bmaparray, from
ufs_bmap, from
vndstrategy+0x18, from
spec_strategy+0x20, etc etc.

This implies a bug in the vnd code, yes?  How come this happens
to me but others can make boot floppies???

DG