SEBSD MAC Kernel build - AMD64

[Dingo]

seems x86 kernel and world build fine on the SEBSD tree as of today, so
the devfs issues seems resolved. At least ive booted a MAC kernel on
x86. make world builds/installs okay on AMD64 also, but building a MAC
kernel doesnt work.

cc -c -O2 -frename-registers -pipe -fno-strict-aliasing  -Wall
-Wredundant-decls -Wnested-externs -Wstrict-prototypes
-Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual
-fformat-extensions -std=c99 -g -nostdinc -I-  -I. -I/usr/src/sys
-I/usr/src/sys/contrib/altq -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS
-include opt_global.h -fno-common -finline-limit=8000 --param
inline-unit-growth=100 --param large-function-growth=1000
-fno-omit-frame-pointer -mcmodel=kernel -mno-red-zone  -mfpmath=387
-mno-sse -mno-sse2 -mno-mmx -mno-3dnow  -msoft-float
-fno-asynchronous-unwind-tables -ffreestanding
-Werror  /usr/src/sys/amd64/amd64/trap.c
/usr/src/sys/amd64/amd64/trap.c: In function `syscall':
/usr/src/sys/amd64/amd64/trap.c:828: warning: passing arg 2 of
`mac_thread_syscall_enter' from incompatible pointer type
/usr/src/sys/amd64/amd64/trap.c:833: warning: passing arg 2 of
`mac_thread_syscall_exit' from incompatible pointer type
/usr/src/sys/amd64/amd64/trap.c:840: warning: passing arg 2 of
`mac_thread_syscall_enter' from incompatible pointer type
/usr/src/sys/amd64/amd64/trap.c:845: warning: passing arg 2 of
`mac_thread_syscall_exit' from incompatible pointer type
*** Error code 1

Stop in /usr/obj/usr/src/sys/MAC.