$ cd /usr/src/sys/dev/disk/mpt && make -m /usr/src/share/mk all
round 1 (initial fix draft): error: struct dev_ioctl_args has no member a_oflags; FWRITE undeclared
   -> corrected to a_fflag + #include <sys/fcntl.h>
round 2: cc ... -c mpt_user.c ; cc -Wl,--build-id=sha1 -nostdlib -r -o mpt.ko mpt.o mpt_cam.o mpt_debug.o mpt_pci.o mpt_raid.o mpt_user.o
BUILD OK (-Werror): mpt.ko with both FWRITE gates