Hello, sorry for typo in my earlier mail.
> cd sys/arch/`uname -p`/conf > echo 'option WIT_PF_LOCK' >> GENERIC.MP > config GENERIC.MP > cd ../compile/GENERIC.MP/ > make clean > make do s/WIT_PF_LOCK/WITH_PF_LOCK in the snippet above. my apologize. thanks and regards sashan