freebsd stable - Sep 2012 - interleaving messages on umass detach

Hi.
No biggie, but when I remove a umass device it appears that two kernel messages 
are being written at the same time.

(da4:umass-sim1:1:0:0): lost device - 0 outstanding, 1 refs
(da4:(pass6:umass-sim1:1:umass-sim1:1:0:0:0): removing device entry
0): passdevgonecb: devfs entry is gone

(FreeBSD 9.1-PRERELEASE #0 r241067)

Cheers
Michiel