link_elf_obj: symbol ata_controlcmd undefined

[C. P. Ghost]

Hello,

what does this boot message means, and where
does it come from?

link_elf_obj: symbol ata_controlcmd undefined
linker_load_file: Unsupported file type

It appears between between
  ZFS storage pool version 28
and
  drm0: <ATI Radeon HD 3200 Graphics> on vgapci0

uname -a:

FreeBSD phenom.cordula.ws 9.0-STABLE FreeBSD 9.0-STABLE #0
r235604: Fri May 18 15:49:06 CEST 2012 root at phenom.cordula.ws:
/usr/obj/usr/src/sys/GENERIC  amd64

TIA,
-cpghost.

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