RFC: ATA to CAM integration patch

hi there,

i'm having problems applying the patch. i copied it to /usr/src and then did
`patch < cam-ata.20090626.patch`. the patch applies cleanly to my source, but
all the files that should go into sys/dev/ahci and sys/modules/ahci get
created in /usr/src. maybe a bug in `patch` or am i doing something wrong?

cheers.