umapfs module build broken

hi there,

${subj}, it happens on both 6.x and -current:

Warning: Object directory not changed from original /usr/src/sys/modules/umapfs
cc -O2 -pipe -s -mtune=pentium4 -march=pentium4 -march=pentium4 -fno-strict-aliasing -Werror -D_KERNEL -DKLD_MODULE -std=c99 -nostdinc -I-   -I. -I_at_ -I_at_/contrib/altq -finline-limit=8000 --param inline-unit-growth=100 --param large-function-growth=1000 -fno-common  -mno-align-long-strings -mpreferred-stack-boundary=2  -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 -ffreestanding -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual  -Wundef -fformat-extensions -c /usr/src/sys/modules/umapfs/../../fs/umapfs/umap_subr.c
/usr/src/sys/modules/umapfs/../../fs/umapfs/umap_subr.c: In function `umap_node_alloc':
/usr/src/sys/modules/umapfs/../../fs/umapfs/umap_subr.c:211: error: `umap_vnodeop_p' undeclared (first use in this function)
/usr/src/sys/modules/umapfs/../../fs/umapfs/umap_subr.c:211: error: (Each undeclared identifier is reported only once
/usr/src/sys/modules/umapfs/../../fs/umapfs/umap_subr.c:211: error: for each function it appears in.)
*** Error code 1

Stop in /usr/src/sys/modules/umapfs.

./danfe