Kernel build error

[Willem Jan Withagen]

One more on amd64, althoug it looks generic.
I could delete the -Werror flag, but none the less it gives a full stop

--WjW

cc -c -O -pipe  -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes  -W
missing-prototypes -Wpointer-arith -Winline -Wcast-qual  -fformat-extensions -st
d=c99 -g -nostdinc -I-  -I. -I/home2/src/sys -I/home2/src/sys/contrib/dev/acpica
 -I/home2/src/sys/contrib/altq -I/home2/src/sys/contrib/ipfilter -I/home2/src/sy
s/contrib/pf -I/home2/src/sys/contrib/dev/ath -I/home2/src/sys/contrib/dev/ath/f
reebsd -I/home2/src/sys/contrib/ngatm -D_KERNEL -include opt_global.h -fno-commo
n -finline-limit=8000 --param inline-unit-growth=100 --param large-function-grow
th=1000  -fno-omit-frame-pointer -mcmodel=kernel -mno-red-zone  -mfpmath=387 -mn
o-sse -mno-sse2 -mno-mmx -mno-3dnow  -msoft-float -fno-asynchronous-unwind-table
s -ffreestanding -Werror  /home2/src/sys/isa/pnp.c
/home2/src/sys/isa/pnp.c: In function `pnp_set_config':
./machine/cpufunc.h:124: warning: inlining failed in call to 'ffs': function not
 considered for inlining
/home2/src/sys/isa/pnp.c:430: warning: called from here
*** Error code 1

Stop in /usr/obj/home2/src/sys/OPTERON.amd64.
*