== DF-4957 build (guest /root/df4957, DragonFly 6.5-DEVELOPMENT, cc 8.3) ==
[captured live; guest later reset with-src (the panic on this same boot
 requires it), so guest-side object files are gone - rebuild via build.sh
 after re-transfer]

First attempt failed: ciphysink.c included <sys/bus.h>, which requires the
generated device_if.h; fixed by dropping the unneeded include.

== building ciphysink.ko ==
cc -O2 -pipe -D_KERNEL [kmod flags] -c ciphysink.c
cc -Wl,--build-id=sha1 -nostdlib -Wl,--hash-style=sysv -r -Wl,-d -o ciphysink.ko ciphysink.o
-rw-r--r-- 1 root 1000 5216 Sep 25 10:50 ciphysink.ko
BUILD_OK